Controller Area Network (CAN) - Except Lancer Evolution Mitsubishi Lancer Evolution X

GENERAL INFORMATION

CAN, an abbreviation for Controller Area Network, is an ISO-certified international standard for a serial multiplex communication protocol*. A communication circuit employing the CAN protocol connects each electric control module (ECU), and sensor data can be shared among, which enables more reduction in wiring.

Note. *: The regulations have been decided in detail, from software matters such as the necessary transmission rate for communication, the system, data format, and communication timing control method to hardware matters such as the harness type and length and the resistance values.

CAN offers the following advantages.

1. Transmission rates are much faster than those in conventional communication (up to 1 Mbps), allowing much more data to be sent.
2. It is exceptionally immune to noise, and the data obtained from each error detection device is more reliable.
3. Each ECU connected via the CAN communicates independently, therefore if the ECU enters damaged mode, communications can be continued in some cases.

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1. A gateway function has been integrated to ETACS-ECU as the network central ECU.
2. The CAN system consists of the following three networks: CAN-B (middle-speed body network), CAN-C (high-speed power train network), and the diagnosis CAN-C (diagnosis exclusive network). Each ECU is connected to one of the networks depending on its functions.
3. The CAN bus line consists of two lines, CAN_L and CAN_H (CAN Low and CAN High, respectively), as well as two terminal resistors (A twisted-pair cable, highly resistant to noise, is used for the communications line).
4. The CAN bus line connecting two dominant ECUs is the main bus line, and the CAN bus line connecting each ECU is the sub-bus line.
5. With CAN-C, the terminal resistors are incorporated in ECU. Resistors with approximately 120 ohms is used for the dominant ECU, and that with 3.0 kohms is used for the non-dominant ECU. NOTE: Dominant ECU: ETACS-ECU and engine ECU Non-dominant ECU: ECU and sensor on CAN-C network, excluding ETACS-ECU and engine ECU
6. To the CAN bus line, ECU, sensor, and data link connector are connected as follows for each network.

CAN-B

1. Wireless control module (WCM) < vehicles without KOS >
2. KOS-ECU < vehicles with KOS >
3. SRS-ECU
4. Occupant classification-ECU
5. A/C-ECU < vehicles with A/C >
6. Heater control unit < vehicles without A/C >
7. Radio and CD player
8. CAN box unit < vehicles with Mitsubishi Multi-Communication System (MMCS) >
9. Satellite radio tuner < vehicles with satellite radio >
10. Combination meter

CAN-C

1. ABS-ECU < vehicles without ASC >
2. ASC-ECU < vehicles with ASC >
3. Electric power steering-ECU < vehicles with electric power steering >
4. Steering wheel sensor < vehicles with ASC >
5. AWC-ECU < RALLIART >
6. Transaxle control module (TCM) < CVT >
7. Transaxle assembly (TC-SST-ECU) < RALLIART >
8. Shift lever < RALLIART >
9. Engine control module (ECM)

DIAGNOSIS CAN-C

1. Data link connector

SPECIAL TOOLS

SPECIAL TOOLS Tool Tool number and name Supersession Application MB991958 MB991824 MB991827 MB991910 MB991911 MB991914 MB991825 MB991826 M.U.T.-III sub assembly Vehicle communication interface (V.C.I.) M.U.T.-III USB cable M.U.T.-III main harness A (Vehicles with CAN communication system) M.U.T.-III main harness B (Vehicles without CAN communication system) M.U.T.-III main harness C (for Chrysler models only) M.U.T.-III measurement adapter M.U.T.-III trigger harness MB991824-KIT NOTE: G: MB991826 M.U.T.-III Trigger Harness is not necessary when pushing V.C.I. ENTER key. CAUTION: M.U.T.-III main harness A (MB991910) should be used. M.U.T.-III main harness B and C should not be used for this vehicle. CAN bus diagnostics MB991223 MB991219 MB991220 MB991221 MB991222 Harness set Test harness LED harness LED harness adaptor Probe General service tools Continuity check and voltage measurement at harness wire or connector for loose, corroded or damaged terminals, or terminals pushed back in the connector. Connector pin contact pressure inspection Power circuit inspection Power circuit inspection Commercial tester connection MB992006 Extra fine probe - Continuity check and voltage measurement at harness wire or connector for loose, corroded or damaged terminals, or terminals pushed back in the connector. MB992110 Power plant ECU check harness - Measure the voltage and resistance at the engine control module (ECM) MB991974 ABS check harness - Measure the voltage and resistance at the ABS-ECU MB991997 ASC check harness - Measure the voltage and resistance at the ASC-ECU

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TEST EQUIPMENT

TEST EQUIPMENT Test equipment Name Application Digital multimeter Checking CAN bus circuit (for resistance and voltage measurements)

SERVICE PRECAUTIONS

SERVICE PRECAUTIONS Warnings in diagnosis section Details regarding warnings CAUTION: When servicing a CAN bus line, ground yourself by touching a metal object such as an unpainted water pipe. If you fail to do, a component connected to the CAN bus line may be broken. - CAUTION: A digital multimeter should be used. When measuring resistance value or voltage in CAN bus lines, use a digital multimeter. If not using a digital multimeter, the equipments, which are connected through the CAN communication lines, may be damaged. CAUTION: When measuring the resistance, disconnect the negative battery terminal. Disconnect the negative battery terminal when measuring the resistance value in the CAN bus line. If you fail to do so, the equipments, which are connected through the CAN communication lines, may be damaged. CAUTION: The test wiring harness should be used. Always use the test harness when measuring the voltage or resistance value at the female connector. If you fail to do so, connectors may be damaged. CAUTION: The strand end of the twist wire should be within 10 cm from the connector. If you repair the wire due to a defective connector or its terminal or harness wire, you should cut the wire so that the strand end of the twist wire should be within 10 cm (4 inches) from the connector as shown in the figure. If it exceeds 10 cm (4 inches), twist the wiring harness just like the original twisted wire. If the strand end exceeds 10 cm (4 inches), a communication error may be caused. CAUTION: Strictly observe the specified wiring harness repair procedure. When you repair a CAN bus line, observe the precautions on how to repair the CAN bus line strictly. Refer to PRECAUTIONS ON HOW TO REPAIR THE CAN BUS LINES . If a new wire is added or a splice point is modified for the CAN_L or CAN_H line, an error in the CAN communication may be caused

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1. If the CAN bus line(s) are repaired, renew all the twisted wires between the end connectors. If the wiring harness is partially repaired, or only CAN_L or CAN_H line is repaired, noise suppression is deteriorated, causing a communication error.
2. If the connector or wire on the main bus line or the sub-bus wire is replaced, the frayed end of the twisted wire should be within 10 cm (4 inches) from the connector. If it exceeds 10 cm (4 inches), twist the wiring harness just like the original twisted wire. If the frayed end exceeds 10 cm (4 inches), noise suppression is deteriorated, causing a communication error.
3. If a sub-bus line is repaired, splice a new wire directly into the main bus line. If a new wire is spliced into the sub-bus line, which is connected to another device, the CAN communication will be disabled.

PRECAUTIONS ON HOW TO REPAIR THE TERMINATOR RESISTOR

If one-side terminator resistor is broken, the CAN communication will continue although noise suppression is deteriorated. No diagnostic trouble code may be set even if the terminator resistor was broken. If damage is found, replace the ECU which incorporates the defective terminator resistor.

CAN BUS LINE REPAIR HARNESS (PART NAME AND NUMBER)

CAN BUS LINE REPAIR HARNESS PART NAME AND NUMBER

EXPLANATION ABOUT THE SCAN TOOL (M.U.T.-III) CAN BUS DIAGNOSTICS

Scan tool MB991958 CAN bus diagnostics carries out the two checks below automatically, and then displays current condition of the CAN bus lines according to the check results.

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1. Scan tool CAN bus diagnostics Scan tool MB991958 diagnoses CAN bus lines in accordance with the following strategy. NOTE: After you determine whether the CAN-C lines are in good condition, then determine whether the CAN-B lines are in good condition. Then confirm each judgment result on the scan tool screen. Check that the ETACS-ECU sets a diagnostic trouble code. You can narrow down the points to be diagnosed by confirming an ETACS-ECU diagnostic trouble code. Checking the communication condition of ECUs Scan tool MB991958 narrows down troubles in circuit by itself. Its strategies are as follows. Reference Circuit CAN BUS LINE DIAGNOSIS TABLE (1 OF 2) ECU which cannot communicate with the scan tool Possible trouble spot Logic for narrowing down trouble spot ETACS-ECU and all ECUs CAN bus line (h) and power supply system to ETACS-ECU The ETACS-ECU and the other ECUs use the CAN bus line (h) when they communicate with scan tool MB991958. Since none of the ETACS-ECU and the other ECUs can communicate with scan tool MB991958, CAN bus line (h) or the power supply circuit to the ETACS-ECU may be faulty. ECU A CAN bus line (a) and power supply system to ECU A ECU A communicates with the scan tool MB991958 via CAN bus lines (a) and (b). Scan tool MB991958 judges that CAN bus line (b) is normal, because it can communicate with other ECUs. Possible trouble may be present in CAN bus line (a) or the power supply system to ECU A. ECU C CAN bus line (g) and power supply system to ECU C The ECU C communicates with scan tool MB991958 via CAN bus lines (b), (c), (d) and (g). Scan tool MB991958 judges that CAN bus lines (b), (c) and (d) are normal, because it can communicate with ECUs B and D. Possible trouble may be present in CAN bus line (g) or the power supply system to ECU C. ECU C and ECU D Trouble in CAN bus line (d) ECUs C and D communicate with scan tool MB991958 via CAN bus lines (b), (c), (d), (e) and (g). Scan tool MB991958 judges that CAN bus lines (b) and (c) are normal, because it can communicate with ECU B. Possible trouble may be present in CAN bus line (d), (e) or (g) or the power supply system to ECU C and ECU D. CAN bus line (d) is shared by ECUs C and D when they communicate with scan tool MB991958, so CAN bus line (d) is suspected as ultimate cause. CAN bus line (g) or (e) and power supply systems to ECU C or D are also suspected as second cause. ECU B and ECU D CAN bus line (e) or (f) or power supply system to ECU B or D ECUs B and D communicate with scan tool MB991958 via CAN bus lines (b), (c), (d), (e) and (f). Scan tool MB991958 judges that CAN bus lines (b), (c) and (d) are normal, because it can communicate with ECU C. Possible trouble may be present in CAN bus line (f) or (e) or the power supply system to ECU B or ECU D. All ECU (except ETACS-ECU) CAN bus line (b) The other ECUs except the ETACS-ECU use CAN bus lines (b) and (h) when they communicate with scan tool MB991958. It must be assumed that CAN bus line (b) is defective since the ETACS-ECU can communicate with scan tool MB991958.
2. Pinpoint possible trouble spot according to diagnostic trouble code If diagnostic trouble code related to CAN communication is set as past trouble, isolate opens as described below. NOTE: If you pinpoint trouble spot according to diagnostic trouble code, you should use time-out diagnostic trouble code. Diagnostic trouble code related to failure information is set when the data to be set contains an error, so CAN bus line itself is probably normal. NOTE: Time-out diagnostic trouble codes are stored in each ECU memory individually. Therefore, it is possible that these diagnostic trouble codes have not been set simultaneously. If the trouble spot cannot be found when you diagnose by judging from multiple diagnostic trouble codes, check the communication lines between each ECU. CAN BUS LINE DIAGNOSIS TABLE (2 OF 2) Diagnostic trouble code to be set Possible trouble spot Logic for narrowing down trouble spot Time-out diagnostic trouble code associated with ECU D is stored in ECU A, ECU B and ECU C. Trouble in CAN bus line (e) and power supply system to ECU D When time-out diagnostic trouble code associated with ECU D is stored in ECU A, B and C, or time-out diagnostic trouble code associated with ECUs A, B and C is stored in ECU D, or "bus off" diagnostic trouble code is stored in ECU D, CAN bus line (e) is suspected. When diagnostic trouble code is not stored in ECU D, the power supply to ECU D is suspected. Time-out diagnostic trouble code associated with ECUs A, B and C is stored in ECU D. "Bus off" diagnostic trouble code is stored in ECU D. Time-out diagnostic trouble code associated with ECU A is stored in ECUs B, C and D. Trouble in CAN bus line (a) or (c) and power supply system to ECU A. When time-out diagnostic trouble code associated with ECU A is stored in ECUs B, C and D, or time-out diagnostic trouble code associated with ECUs B, C and D is stored in ECU A, or "bus off" diagnostic trouble code is stored in ECU A, CAN bus line (a) or (c) is suspected. When diagnostic trouble code is not stored in ECU A, the power supply to ECU A is suspected. Time-out diagnostic trouble code associated with ECUs B, C and D is stored in ECU A. "Bus off" diagnostic trouble code is stored in ECU A. Time-out diagnostic trouble codes associated with ECUs C and D are stored in ECU A and ECU B. Trouble in CAN bus line (d) If time-out diagnostic trouble codes associated with ECUs C and D are stored in ECUs A and B, or time-out codes associated with ECUs A and B are stored in ECUs C and D, CAN bus line (d) is suspected. CAN bus line (g) or (e) and power supply systems to ECU C or D are also suspected as second cause. Time-out diagnostic trouble codes associated with ECUs A and B are stored in ECU C and ECU D. Time-out diagnostic trouble codes associated with ECUs A, B, C and D are stored in ETACS-ECU. Trouble in CAN bus line (b) It must be assumed that a fault was present in CAN bus line (b) when the ETACS-ECU has set a time-out diagnostic trouble code for ECU A, B, C or D. Time-out diagnostic trouble codes associated with ETACS-ECU is stored in ECU A, B, C and ECU D.

ON-BOARD DIAGNOSTICS

The CAN is a communication method which the ECUs use in order to communicate each other. The CAN-related diagnostic trouble codes will be stored in the following ECUs, which use the CAN communication.

1. ETACS-ECU
2. ECM
3. TCM < CVT >
4. Transaxle assembly (TC-SST-ECU) < RALLIART >
5. Steering wheel sensor < vehicles with ASC >
6. ABS-ECU < vehicles without ASC >
7. ASC-ECU < vehicles with ASC >
8. AWC-ECU < RALLIART >
9. Electric power steering-ECU < vehicles with electric power steering >
10. Shift lever < RALLIART >
11. A/C-ECU < vehicles with A/C >
12. Heater control unit < vehicles without A/C >
13. SRS-ECU
14. Occupant classification-ECU
15. Radio and CD player
16. CAN box unit < vehicles with Mitsubishi Multi-Communication System (MMCS) >
17. Satellite radio tuner < vehicles with satellite radio >
18. WCM < vehicles without KOS >
19. KOS-ECU < vehicles with KOS >
20. Combination meter

HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

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1. Ensure that the ignition switch is at the "LOCK" (OFF) position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824 and the personal computer.
4. Connect special tool MB991910 to special tool MB991824.
5. Connect special tool MB991910 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON" position. NOTE: When special tool MB991824 is energized, special tool MB991824 indicator light will be illuminated in a green color.
7. Start the scan tool system on the personal computer. NOTE: Disconnecting scan tool MB991958 is the reverse of the connecting sequence, making sure that the ignition switch is at the "LOCK" (OFF) position.

HOW TO DIAGNOSE THE CAN BUS LINE

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "CAN Bus Diagnosis" from the start-up screen.
4. When the vehicle information is displayed, confirm that it matches the vehicle whose CAN bus lines will be diagnosed. If they match, go to step 8 . If not, go to step 5.
5. Select the "view vehicle information" button.
6. Enter the vehicle information and select the "OK" button.
7. When the vehicle information is displayed, confirm again that it matches the vehicle whose CAN bus lines will be diagnosed. If they match, go to step 8. If not, go to step 5 .
8. Select the "OK" button.
9. When the optional equipment screen is displayed, choose the one which the vehicle is fitted with, and then select the "OK" button.

CAN BUS DIAGNOSTICS TABLE

This diagnosis applies only to the CAN bus lines. If a different system is defective, proceed to the applicable diagnosis section for each system. Observe the diagnosis procedure below only when the CAN bus line is defective.

CAN BUS DIAGNOSIS TABLE Scan tool screen (The ECUs that are not adopted are not displayed.) - Diagnosis detail Reference Comment Short circuit to battery in red displayed area is estimated. Diagnosis Item 1 Diagnose when the scan tool cannot receive the data sent by ETACS-ECU. DIAGNOSTIC ITEM 1: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY ETACS-ECU. Grounding in red displayed area is estimated. Diagnosis Item 2 Malfunction of the ETACS-ECU. DIAGNOSTIC ITEM 2: MALFUNCTION OF THE ETACS-ECU. CAN-C: A bus-off failure is present in the gateway ECU. Diagnosis Item 3 Abnormal short between the CAN-C bus lines. DIAGNOSTIC ITEM 3: ABNORMAL SHORT BETWEEN THE CAN-C BUS LINES. CAN-C: Grounding in red displayed area is estimated Diagnosis Item 4 Diagnose shorts in the ground to CAN-C bus line. DIAGNOSTIC ITEM 4: DIAGNOSE SHORTS IN THE GROUND TO CAN-C BUS LINE. CAN-C: Short circuit to battery in red displayed area is estimated Diagnosis Item 5 Diagnose shorts in the power supply to CAN-C bus line. DIAGNOSTIC ITEM 5: DIAGNOSE SHORTS IN THE POWER SUPPLY TO CAN-C BUS LINE. CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 6 Diagnose when the scan tool cannot receive the data sent by steering wheel sensor. DIAGNOSTIC ITEM 6: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY STEERING WHEEL SENSOR. CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 7 Diagnose when the scan tool cannot receive the data sent by AWC-ECU. < RALLIART > DIAGNOSTIC ITEM 7: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY AWC-ECU. < RALLIART > CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 8 Diagnose when the scan tool cannot receive the data sent by ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC >. DIAGNOSTIC ITEM 8: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY ABS-ECU < VEHICLES WITHOUT ASC > OR ASC-ECU < VEHICLES WITH ASC >. CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 9 Diagnose when the scan tool cannot receive the data sent by shift lever. < RALLIART > DIAGNOSTIC ITEM 9: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY SHIFT LEVER. < RALLIART >). CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 10 Diagnose when the scan tool cannot receive the data sent by TCM. < CVT > DIAGNOSTIC ITEM 10: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY TCM. < CVT > CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 11 Diagnose when the scan tool cannot receive the data sent by electric power steering-ECU < vehicles with electric power steering >. DIAGNOSTIC ITEM 11: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY ELECTRIC POWER STEERING-ECU. < VEHICLES WITH ELECTRIC POWER STEERING > CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 12 Diagnose when the scan tool cannot receive the data sent by transaxle assembly (TC-SST-ECU). < RALLIART > DIAGNOSTIC ITEM 12: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY TRANSAXLE ASSEMBLY (TC-SST-ECU). < RALLIART > CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 13 Diagnose when the scan tool cannot receive the data sent by ECM. DIAGNOSTIC ITEM 13: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY ECM. CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 14 Diagnose the lines between the ETACS-ECU and joint connector (CAN2). DIAGNOSTIC ITEM 14: DIAGNOSE THE LINES BETWEEN THE ETACS-ECU AND JOINT CONNECTOR (CAN2). CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 15 Diagnose the lines between joint connector (CAN2) and joint connector (CAN3). DIAGNOSTIC ITEM 15: DIAGNOSE THE LINES BETWEEN JOINT CONNECTOR (CAN2) AND JOINT CONNECTOR (CAN3). CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 16 Diagnose the lines between joint connector (CAN3) and joint connector (CAN4). < RALLIART > DIAGNOSTIC ITEM 16: DIAGNOSE THE LINES BETWEEN JOINT CONNECTOR (CAN3) AND JOINT CONNECTOR (CAN4). < RALLIART > CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 17 Diagnose when the scan tool cannot receive the data sent by KOS-ECU. < vehicles with KOS > DIAGNOSTIC ITEM 17: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY KOS-ECU. < VEHICLES WITH KOS > Diagnosis Item 18 Diagnose when the scan tool cannot receive the data sent by WCM. < vehicles without KOS > DIAGNOSTIC ITEM 18: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY WCM. < VEHICLES WITH WCM > CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 19 Diagnose when the scan tool cannot receive the data sent by SRS-ECU. DIAGNOSTIC ITEM 19: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY SRS-ECU. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 20 Diagnose when the scan tool cannot receive the data sent by A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C >. DIAGNOSTIC ITEM 20: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY A/C-ECU < VEHICLES WITH A/C > OR HEATER CONTROL UNIT < VEHICLES WITHOUT A/C >. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 21 Diagnose when the scan tool cannot receive the data sent by radio and CD player < vehicles with radio and CD player > DIAGNOSTIC ITEM 21: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY RADIO AND CD PLAYER. < VEHICLES WITH RADIO AND CD PLAYER > CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 22 Diagnose when the scan tool cannot receive the data sent by CAN box unit < vehicles with MMCS > DIAGNOSTIC ITEM 22: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY CAN BOX UNIT < VEHICLES WITH MMCS >. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 23 Diagnose when the scan tool cannot receive the data sent by combination meter. DIAGNOSTIC ITEM 23: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY COMBINATION METER. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 24 Diagnose when the scan tool cannot receive the data sent by occupant classification-ECU. DIAGNOSTIC ITEM 24: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY OCCUPANT CLASSIFICATION-ECU. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 25 Diagnose when the scan tool cannot receive the data sent by satellite radio tuner. < vehicles with satellite radio tuner > DIAGNOSTIC ITEM 25: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY SATELLITE RADIO TUNER < VEHICLES WITH SATELLITE RADIO TUNER >. CAN-B: A failure in the red section, or a bus-off failure is present in the gateway ECU. Diagnosis Item 26 Short to power supply or ground in both CAN_H and CAN_L lines. DIAGNOSTIC ITEM 26: SHORT TO POWER SUPPLY OR GROUND IN BOTH CAN_H AND CAN_L LINES. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 27 Diagnose the ETACS-ECU, joint connector (CAN1) or lines between ETACS-ECU and joint connector (CAN1). DIAGNOSTIC ITEM 27: DIAGNOSE THE ETACS-ECU, JOINT CONNECTOR (CAN1) OR LINES BETWEEN ETACS-ECU AND JOINT CONNECTOR (CAN1). CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 28 Short to power supply or ground, open circuit or line-to-line short in the CAN-B bus lines. DIAGNOSTIC ITEM 28: SHORT TO POWER SUPPLY OR GROUND, OPEN CIRCUIT OR LINE-TO-LINE SHORT IN THE CAN-B BUS LINES.

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CONNECTOR REFERENCE TABLE (1 OF 2)

CONNECTOR REFERENCE TABLE (2 OF 2)

DIAGNOSTIC ITEM 1: Diagnose when the scan tool cannot receive the data sent by ETACS-ECU

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FUNCTION

When the CAN bus diagnosis is carried out, the scan tool communicates with the ETACS-ECU. If a communication flag is not set for the ETACS-ECU, the ETACS-ECU will be diagnosed as a communication error.

TROUBLE JUDGMENT CONDITIONS

If a communication flag is not set for the ETACS-ECU, the scan tool determines that there is a failure.

TROUBLESHOOTING HINTS

1. Malfunction of the connector (data link connector or ETACS-ECU connector improperly connected)
2. Malfunction of the wiring harness (open circuit, short to ground, short to power supply between the data link connector and the ETACS-ECU connector, line-to-line short, or power supply to the ETACS-ECU)
3. Malfunction of ETACS-ECU

DIAGNOSIS

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe
3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

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1. STEP 1. Check data link connector C-34 and ETACS-ECU connector C-301 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are data link connector C-34 and ETACS-ECU connector C-301 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between data link connector C-34 and ETACS-ECU connector C-301 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect the scan tool and ETACS-ECU connector C-301, and check the wiring harness. Check the wiring harness between data link connector C-34 (terminal 6) and ETACS-ECU connector C-301 (terminal 5) < CAN_H > OK: Continuity exists (2 ohms or less) Check the wiring harness between data link connector C-34 (terminal 14) and ETACS-ECU connector C-301 (terminal 4) < CAN_L > OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between data link connector C-34 and ETACS-ECU connector C-301 in good condition? YES: Go to Step 3. NO: Repair the wiring harness between data link connector C-34 and ETACS-ECU connector C-301.
3. STEP 3. Check the wiring harness between data link connector C-34 and ETACS-ECU connector C-301 for a short to ground. Measure the resistance at data link connector C-34. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect the scan tool and ETACS-ECU connector C-301, and measure the resistance at the wiring harness side of data link connector C-34. Measure the resistance between data link connector terminal 6 and body ground. < CAN_H > OK: 1 kilo ohm or more Measure the resistance between data link connector terminal 14 and body ground. < CAN_L > OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 4. NO: Repair the wiring harness between data link connector C-34 and ETACS-ECU connector C-301.
4. STEP 4. Check the wiring harness between data link connector C-34 and ETACS-ECU connector C-301 for a short to the power supply. Measure the voltage at data link connector C-34. Disconnect the scan tool and ETACS-ECU connector C-301, and measure the resistance at the wiring harness side of data link connector C-34. Turn the ignition switch to the "ON" position. Measure the voltage between data link connector terminal 6 and body ground. < CAN_H > OK: 1 volts or less Measure the voltage between data link connector terminal 14 and body ground. < CAN_L > OK: 1 volts or less Q: Do all the voltage measure 5 volts or less? YES: Go to Step 5. NO: Repair the wiring harness between data link connector C-34 and ETACS-ECU connector C-301.
5. STEP 5. Check the wiring harness between data link connector C-34 and ETACS-ECU connector C-301 for line-to-line short. Measure the resistance at data link connector C-34. Disconnect the scan tool and ETACS-ECU connector C-301, and measure the resistance at the wiring harness side of data link connector C-34. Measure the resistance between data link connector terminal 6 and 14. OK: No continuity Q: Is the check result normal? YES: Go to Step 6. NO: Repair the wiring harness between data link connector C-34 and ETACS-ECU connector C-301.
6. STEP 6. Using scan tool MB991958, diagnose the CAN bus line. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool screen is as shown in the illustration. Q: Does the scan tool screen correspond to the illustration? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/hoistjack/#general-information-except-lancer-evolution__how-to-cope-with-intermittent-malfunctions) ). NO: Replace the ETACS-ECU.

DIAGNOSTIC ITEM 2: Malfunction of the ETACS-ECU

When the CAN bus diagnosis is carried out, the scan tool sets communication "OK" flags in the patch between the ETACS-ECU and active other ECUs. If a communication "OK" flag is not set for the ECUs other than the ETACS-ECU, this diagnosis result will be set.

If no communication flags are set for the ECUs (on the CAN-B or CAN-C lines) other than the ETACS-ECU, the ETACS-ECU determines that there is a failure.

TROUBLESHOOTING HINT

Malfunction of the ETACS-ECU

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

Recheck for other system diagnostic trouble code.

Check whether ETACS-ECU-related DTC is set.

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? The DTC other than the U code is set.: Troubleshoot the ETACS-ECU. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#electronic-time-and-alarm-control-system-etacs-except-lancer-evolution__diagnostic-trouble-code-chart) . Only U-code DTC is set.: Check the power supply circuit of the ETACS-ECU. Refer to «MALFUNCTION OF ETACS-ECU POWER SUPPLY CIRCUIT»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#electronic-time-and-alarm-control-system-etacs-except-lancer-evolution) . The DTC is not set.: Check the power supply circuit of the ETACS-ECU. Refer to «MALFUNCTION OF ETACS-ECU POWER SUPPLY CIRCUIT»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#electronic-time-and-alarm-control-system-etacs-except-lancer-evolution) .

DIAGNOSTIC ITEM 3: Abnormal short between the CAN-C bus lines

Scheme 114

Scheme 115

Scheme 116

If a line-to-line short is present in the CAN-C lines, this diagnosis result will be set.

If only diagnostic trouble code U0001 is set, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector (joint connectors or ECU connectors improperly connected)
2. Malfunction of the wiring harness (line-to-line short in the CAN-C main or sub bus lines)
3. Malfunction of the ECU (ECU on CAN-C lines failed)

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe
3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A
4. MB991974: ABS Check Harness
5. MB991997: ASC Check Harness
6. MB992110: Power Plant ECU Check Harness

Scheme 117

Scheme 118

Scheme 119

Scheme 120

Scheme 121

Scheme 122

Scheme 123

Scheme 124

Scheme 125

Scheme 126

Scheme 127

Scheme 128

Scheme 129

Scheme 130

Scheme 131

1. STEP 1. Check joint connector (CAN2) C-05, joint connector (CAN3) C-124 and joint connector (CAN4) A-55 < RALLIART > for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN2) C-05, joint connector (CAN3) C-124 and joint connector (CAN4) A-55 < RALLIART > in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN2) C-05 and steering wheel sensor connector C-211 for line-to-line short. Measure the resistance at joint connector (CAN2) C-05. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2), and check that there is continuity at the harness side of joint connector (CAN2). Check that there is continuity between joint connector (CAN2) terminals 7 and 20. OK: No continuity Q: Is the check result normal? YES < except RALLIART >: Go to Step 4 . YES < RALLIART >: Go to Step 3. NO: Go to Step 14 .
3. STEP 3. Check the wiring harness between joint connector (CAN2) C-05 and AWC-ECU connector C-51 for line-to-line short. Measure the resistance at joint connector (CAN2) C-05. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2), and check that there is continuity at the harness side of joint connector (CAN2). Check that there is continuity between joint connector (CAN2) terminals 4 and 15. OK: No continuity Q: Is the check result normal? YES: Go to Step 5 . NO: Go to Step 15 .
4. STEP 4. Check the wiring harness between joint connector (CAN2) C-05 and no connection connector C-51 for line-to-line short. Measure the resistance at joint connector (CAN2) C-05. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2), and check that there is continuity at the harness side of joint connector (CAN2). Check that there is continuity between joint connector (CAN2) terminals 4 and 15. OK: No continuity Q: Is the check result normal? YES: Go to Step 5. NO: Repair the wiring harness between joint connector (CAN2) C-05 and no connection connector C-51.
5. STEP 5. Check the wiring harness between joint connector (CAN2) C-05 and ETACS-ECU connector C-301 for line-to-line short. Measure the resistance at joint connector (CAN2) C-05. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2), and check that there is continuity at the harness side of joint connector (CAN2). Check that there is continuity between joint connector (CAN2) terminals 6 and 19. OK: 120 ± 20 ohms Q: Is the check result normal? YES: Go to Step 6. NO: Go to Step 16 .
6. STEP 6. Check the wiring harness between joint connector (CAN3) C-124 and ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC > for line-to-line short. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and check that there is continuity at the harness side of joint connector (CAN3). Check that there is continuity between joint connector (CAN3) terminals 6 and 19. OK: No continuity Q: Is the check result normal? YES < except RALLIART >: Go to Step 7. YES < RALLIART >: Go to Step 10 . NO: Go to Step 17 .
7. STEP 7. Check the wiring harness between joint connector (CAN3) C-124 and TCM connector C-41 for line-to-line short. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and check that there is continuity at the harness side of joint connector (CAN3). Check that there is continuity between joint connector (CAN3) terminals 7 and 20. OK: No continuity Q: Is the check result normal? YES: Go to Step 8. NO: Go to Step 18 .
8. STEP 8. Check the wiring harness between joint connector (CAN3) C-124 and ECM connector B-109 < except RALLIART > for line-to-line short. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and check that there is continuity at the harness side of joint connector (CAN3). Check that there is continuity between joint connector (CAN3) terminals 4 and 15. OK: 120 ± 20 ohms Q: Is the check result normal? YES: Go to Step 9. NO: Go to Step 19 .
9. STEP 9. Check the wiring harness between joint connector (CAN3) C-124 and electric power steering-ECU connector C-141 < vehicles with electric power steering > for a short to ground. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and check that there is continuity at the harness side of joint connector (CAN3). Check that there is continuity between joint connector (CAN3) terminals 3 and 14. OK: No continuity Q: Do all the resistances measure 1 kilo ohm or more? YES: Check intermediate connector C-128, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN2) C-05 and joint connector (CAN3) C-124. NO: Go to Step 20 .
10. STEP 10. Check the wiring harness between joint connector (CAN3) C-124 and shift lever connector C-49 for line-to-line short. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and check that there is continuity at the harness side of joint connector (CAN3). Check that there is continuity between joint connector (CAN3) terminals 7 and 20. OK: No continuity Q: Is the check result normal? YES: Go to Step 11. NO: Go to Step 21 .
11. STEP 11. Check the wiring harness between joint connector (CAN4) A-55 and ECM connector B-109 < RALLIART > for line-to-line short. Measure the resistance at joint connector (CAN4) A-55. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN4), and check that there is continuity at the harness side of joint connector (CAN4). Check that there is continuity between joint connector (CAN4) terminals 6 and 19. OK: No continuity Q: Is the check result normal? YES: Go to Step 12. NO: Go to Step 19 .
12. STEP 12. Check the wiring harness between joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-120 for line-to-line short. Measure the resistance at joint connector (CAN4) A-55. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN4), and check that there is continuity at the harness side of joint connector (CAN4). Check that there is continuity between joint connector (CAN4) terminals 7 and 20. OK: No continuity Q: Is the check result normal? YES: Go to Step 13. NO: Go to Step 22 .
13. STEP 13. Check the wiring harness between joint connector (CAN3) C-124 and joint connector (CAN2) C-05 for line-to-line short. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3) and Disconnect joint connector (CAN2), and check that there is continuity at the harness side of joint connector (CAN3). Check that there is continuity between joint connector (CAN3) terminals 5 and 16. OK: No continuity Q: Is the check result normal? YES: Check intermediate connector A-54, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN3) C-124 and joint connector (CAN4) A-55. NO: Check intermediate connector C-128, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN2) C-05 and joint connector (CAN3) C-124.
14. STEP 14. Using scan tool MB991958, diagnose the CAN bus line. (checking the steering wheel sensor for internal short) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect steering wheel sensor connector C-209. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between steering wheel sensor connector C-211 and joint connector (CAN2) C-05. NO: Check steering wheel sensor connector C-211, and repair if necessary. If the steering wheel sensor connector is in good condition, replace the steering wheel sensor.
15. STEP 15. Using scan tool MB991958, diagnose the CAN bus line. (checking the AWC-ECU for internal short) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect AWC-ECU connector C-51. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Check C-35 intermediate connector, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between AWC-ECU connector C-51 and joint connector (CAN2) C-05. NO: Check AWC-ECU connector C-51, and repair if necessary. If the AWC-ECU connector is in good condition, replace the AWC-ECU.
16. STEP 16. Check the wiring harness between joint connector (CAN2) C-05 and ETACS-ECU connector C-301 for line-to-line short. Measure the resistance at joint connector (CAN2) C-05. Disconnect joint connector (CAN2) and ETACS-ECU connector, and check that there is continuity at the harness side of joint connector (CAN2). Check that there is continuity between joint connector (CAN2) terminals 6 and 19. OK: No continuity Q: Is the check result normal? YES: Go to Step 23 . NO: Repair the wiring harness between ETACS-ECU connector C-301 and joint connector (CAN2) C-05.
17. STEP 17. Using scan tool MB991958, diagnose the CAN bus line. (checking the ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC >)> for internal short) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC >. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC > and joint connector (CAN3) C-124. NO: Check ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC >, and repair if necessary. If the ABS-ECU connector < vehicles without ASC > or ASC-ECU connector < vehicles with ASC > is in good condition, replace the ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC >.
18. STEP 18. Using scan tool MB991958, diagnose the CAN bus line. (checking the TCM for internal short) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect TCM connector C-41. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between TCM connector C-41 and joint connector (CAN3) C-124. NO: Check TCM connector C-41, and repair if necessary. If the TCM connector is in good condition, replace the TCM connector.
19. STEP 19. Using scan tool MB991958, diagnose the CAN bus line. (checking the ECM for internal short) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect ECM connector B-109. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between ECM connector B-109 and joint connector (CAN3) C-124 < except RALLIART >, or check intermediate connector is in good condition, repair the wiring harness between ECM connector B-109 and joint connector (CAN4) A-55 < RALLIART >. NO: Check ECM connector B-109, and repair if necessary. If the ECM connector is in good condition, replace the ECM connector.
20. STEP 20. Using scan tool MB991958, diagnose the CAN bus line. (checking the electric power steering-ECU < vehicles with electric power steering > for internal short) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect ECM connector B-109. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between electric power steering-ECU connector C-141 < vehicles with electric power steering > and joint connector (CAN3) C-124. NO: Check electric power steering-ECU connector C-141 < vehicles with electric power steering >, and repair if necessary. If the electric power steering-ECU connector < vehicles with electric power steering > is in good condition, replace the electric power steering-ECU < vehicles with electric power steering >.
21. STEP 21. Using scan tool MB991958, diagnose the CAN bus line. (checking the shift lever for internal short) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect shift lever connector C-49. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between shift lever connector C-49 and joint connector (CAN3) C-124. NO: Check shift lever connector C-49, and repair if necessary. If the shift lever is in good condition, replace the shift lever.
22. STEP 22. Using scan tool MB991958, diagnose the CAN bus line. (checking the transaxle assembly (TC-SST-ECU) for internal short) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect transaxle assembly (TC-SST-ECU) connector B-120. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between transaxle assembly (TC-SST-ECU) connector B-120 and joint connector (CAN4) A-55. NO: Check transaxle assembly (TC-SST-ECU) connector B-120, and repair if necessary. If the transaxle assembly (TC-SST-ECU) is in good condition, replace the transaxle assembly (TC-SST-ECU).
23. STEP 23. Using scan tool MB991958, diagnose the CAN bus line. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool screen is as shown in the illustration. Q: Does the scan tool screen correspond to the illustration? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/hoistjack/#general-information-except-lancer-evolution__how-to-cope-with-intermittent-malfunctions) ). NO: Replace the ETACS-ECU.

Scheme 132

If a short to ground is present in the CAN-C lines, this diagnosis result will be set.

If DTC U1120 is set, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector (short to ground inside connector)
2. Malfunction of the wiring harness (short to ground in the CAN-C main or sub bus lines)
3. Malfunction of the ECU (ETACS-ECU, or ECUs on CAN-C lines failed)

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe
3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A
4. MB991974: ABS Check Harness
5. MB991997: ASC Check Harness
6. MB992110: Power Plant ECU Check Harness

Scheme 133

Scheme 134

Scheme 135

Scheme 136

Scheme 137

Scheme 138

Scheme 139

Scheme 140

Scheme 141

Scheme 142

Scheme 143

Scheme 144

Scheme 145

Scheme 146

Scheme 147

Scheme 148

Scheme 149

Scheme 150

Scheme 151

Scheme 152

Scheme 153

1. STEP 1. Check the wiring harness between joint connector (CAN2) C-05 and steering wheel sensor connector C-211 for a short to ground. Measure the resistance at joint connector (CAN2) C-05. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2), and measure the resistance at the wiring harness side of joint connector (CAN2). Measure the resistance between joint connector (CAN2) terminal 7 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN2) terminal 20 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES < except RALLIART >: Go to Step 3 . YES < RALLIART >: Go to Step 2. NO: Go to Step 13 .
2. STEP 2. Check the wiring harness between joint connector (CAN2) C-05 and AWC-ECU connector C-51 for a short to ground. Measure the resistance at joint connector (CAN2) C-05. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2), and measure the resistance at the wiring harness side of joint connector (CAN2). Measure the resistance between joint connector (CAN2) terminal 4 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN2) terminal 15 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 4 . NO: Go to Step 14 .
3. STEP 3. Check the wiring harness between joint connector (CAN2) C-05 and no connection connector C-51 for a short to ground. Measure the resistance at joint connector (CAN2) C-05. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2), and measure the resistance at the wiring harness side of joint connector (CAN2). Measure the resistance between joint connector (CAN2) terminal 4 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN2) terminal 15 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 4. NO: Repair the wiring harness between joint connector (CAN2) C-05 and no connection connector C-51.
4. STEP 4. Check the wiring harness between joint connector (CAN2) C-05 and ETACS-ECU connector C-301 for a short to ground. Measure the resistance at joint connector (CAN2) C-05. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2), and measure the resistance at the wiring harness side of joint connector (CAN2). Measure the resistance between joint connector (CAN2) terminal 6 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN2) terminal 19 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 5. NO: Go to Step 15 .
5. STEP 5. Check the wiring harness between joint connector (CAN3) C-124 and ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC > for a short to ground. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and measure the resistance at the wiring harness side of joint connector (CAN3). Measure the resistance between joint connector (CAN3) terminal 6 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN3) terminal 19 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES < except RALLIART >: Go to Step 6. YES < RALLIART >: Go to Step 9 . NO: Go to Step 16 .
6. STEP 6. Check the wiring harness between joint connector (CAN3) C-124 and TCM connector C-41 for a short to ground. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and measure the resistance at the wiring harness side of joint connector (CAN3). Measure the resistance between joint connector (CAN3) terminal 7 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN3) terminal 20 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 7. NO: Go to Step 17 .
7. STEP 7. Check the wiring harness between joint connector (CAN3) C-124 and ECM connector B-109 < except RALLIART > for a short to ground. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and measure the resistance at the wiring harness side of joint connector (CAN3). Measure the resistance between joint connector (CAN3) terminal 4 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN3) terminal 15 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 8. NO: Go to Step 18 .
8. STEP 8. Check the wiring harness between joint connector (CAN3) C-124 and electric power steering-ECU connector C-141 < vehicles with electric power steering > for a short to ground. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and measure the resistance at the wiring harness side of joint connector (CAN3). Measure the resistance between joint connector (CAN3) terminal 3 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN3) terminal 14 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Check intermediate connector C-128, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN2) C-05 and joint connector (CAN3) C-124. NO: Go to Step 19 .
9. STEP 9. Check the wiring harness between joint connector (CAN3) C-124 and shift lever connector C-49 for a short to ground. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and measure the resistance at the wiring harness side of joint connector (CAN3). Measure the resistance between joint connector (CAN3) terminal 7 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN3) terminal 20 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 10. NO: Go to Step 20 .
10. STEP 10. Check the wiring harness between joint connector (CAN4) A-55 and ECM connector B-109 < RALLIART > for a short to ground. Measure the resistance at joint connector (CAN4) A-55. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN4), and measure the resistance at the wiring harness side of joint connector (CAN4). Measure the resistance between joint connector (CAN4) terminal 6 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN4) terminal 19 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 11. NO: Go to Step 18 .
11. STEP 11. Check the wiring harness between joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-120 for a short to ground. Measure the resistance at joint connector (CAN4) A-55. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN4), and measure the resistance at the wiring harness side of joint connector (CAN4). Measure the resistance between joint connector (CAN4) terminal 7 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN4) terminal 20 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 12. NO: Go to Step 21 .
12. STEP 12. Check the wiring harness between joint connector (CAN3) C-124 and joint connector (CAN2) C-05 for a short to ground. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and measure the resistance at the wiring harness side of joint connector (CAN3). Measure the resistance between joint connector (CAN3) terminal 5 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN3) terminal 16 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Check intermediate connector A-54, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN3) C-124 and joint connector (CAN4) A-55. NO: Check intermediate connector C-128, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN3) C-124 and joint connector (CAN2) C-05.
13. STEP 13. Using scan tool MB991958, diagnose the CAN bus line. (checking the steering wheel sensor for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect steering wheel sensor connector C-211. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between steering wheel sensor connector C-211 and joint connector (CAN2) C-05. NO: Check steering wheel sensor connector C-211, and repair if necessary. If the steering wheel sensor connector is in good condition, replace the steering wheel sensor.
14. STEP 14. Using scan tool MB991958, diagnose the CAN bus line. (checking the AWC-ECU for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect AWC-ECU connector C-51. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between AWC-ECU connector C-51 and joint connector (CAN2) C-05. NO: Check AWC-ECU connector C-51, and repair if necessary. If the AWC-ECU connector is in good condition, replace the AWC-ECU.
15. STEP 15. Check the wiring harness between joint connector (CAN2) C-05 and ETACS-ECU connector C-301 for a short to ground. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect ETACS-ECU connector and joint connector (CAN2), and measure at the wiring harness side. Measure the resistance between joint connector (CAN2) terminal 6 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN2) terminal 19 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Check ETACS-ECU connector C-301, and repair if necessary. If the ETACS-ECU connector is in good condition, replace the ETACS-ECU. NO: Repair the wiring harness between ETACS-ECU connector C-301 and joint connector (CAN2) C-05.
16. STEP 16. Using scan tool MB991958, diagnose the CAN bus line. (checking the ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC > for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC >. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC > and joint connector (CAN3) C-124. NO: Check ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC >, and repair if necessary. If the ABS-ECU connector < vehicles without ASC > or ASC-ECU connector < vehicles with ASC > is in good condition, replace the ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC >.
17. STEP 17. Using scan tool MB991958, diagnose the CAN bus line. (checking the TCM for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect TCM connector C-41. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between TCM connector C-41 and joint connector (CAN3) C-124. NO: Check TCM connector C-41, and repair if necessary. If the TCM connector is in good condition, replace the TCM.
18. STEP 18. Using scan tool MB991958, diagnose the CAN bus line. (checking the ECM for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect ECM connector B-109. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between ECM connector B-109 and joint connector (CAN3) C-124 < except RALLIART >, or check intermediate connector A-54 < RALLIART >, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between ECM connector B-109 and joint connector (CAN4) A-55 < RALLIART >. NO: Check ECM connector B-109, and repair if necessary. If the ECM connector is in good condition, replace the ECM.
19. STEP 19. Using scan tool MB991958, diagnose the CAN bus line. (checking the electric power steering-ECU < vehicles with electric power steering > for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect electric power steering-ECU connector C-141 < vehicles with electric power steering >. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between electric power steering-ECU connector C-141 < vehicles with electric power steering > and joint connector (CAN3) C-124. NO: Check electric power steering-ECU connector C-141 < vehicles with electric power steering >, and repair if necessary. If the electric power steering-ECU connector < vehicles with electric power steering > is in good condition, replace the electric power steering-ECU < vehicles with electric power steering >.
20. STEP 20. Using scan tool MB991958, diagnose the CAN bus line. (checking the shift lever for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect shift lever connector C-49. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between shift lever connector C-49 and joint connector (CAN3) C-124. NO: Check shift lever connector C-49, and repair if necessary. If the shift lever connector is in good condition, replace the shift lever.
21. STEP 21. Using scan tool MB991958, diagnose the CAN bus line. (checking the transaxle assembly (TC-SST-ECU) connector for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect transaxle assembly (TC-SST-ECU) connector B-120. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between transaxle assembly (TC-SST-ECU) connector B-120 and joint connector (CAN4) A-55. NO: Check transaxle assembly (TC-SST-ECU) connector B-120, and repair if necessary. If the transaxle assembly (TC-SST-ECU) connector is in good condition, replace the transaxle assembly (TC-SST-ECU).

Scheme 154

If a short to power supply is present in the CAN-C lines, this diagnosis result will be set.

The wiring harness wire or connectors may have loose, corroded, or damage terminals, or terminals pushed back in the connector, or an ECU may be defective.

1. Malfunction of the connector (short to power supply in connector)
2. Malfunction of the wiring harness (short to power supply in the CAN-C main or sub bus lines)
3. Malfunction of the ECU (ETACS-ECU, or ECUs on CAN-C lines failed)

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe
3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A
4. MB991974: ABS Check Harness
5. MB991997: ASC Check Harness
6. MB992110: Power Plant ECU Check Harness

Scheme 155

Scheme 156

Scheme 157

Scheme 158

Scheme 159

Scheme 160

Scheme 161

Scheme 162

Scheme 163

Scheme 164

Scheme 165

Scheme 166

Scheme 167

Scheme 168

Scheme 169

Scheme 170

Scheme 171

Scheme 172

Scheme 173

Scheme 174

Scheme 175

1. STEP 1. Check the wiring harness between joint connector (CAN2) C-05 and steering wheel sensor connector C-211 for a short to power supply. Measure the voltage at joint connector (CAN2) C-05. Disconnect joint connector (CAN2), and measure the voltage at the wiring harness side of joint connector (CAN2). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN2) terminal 7 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN2) terminal 20 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES < except RALLIART >: Go to Step 3 . YES < RALLIART >: Go to Step 2. NO: Go to Step 13 .
2. STEP 2. Check the wiring harness between joint connector (CAN2) C-05 and AWC-ECU connector C-51 for a short to power supply. Measure the voltage at joint connector (CAN2) C-05. Disconnect joint connector (CAN2), and measure the voltage at the wiring harness side of joint connector (CAN2). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN2) terminal 4 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN2) terminal 15 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 4 . NO: Go to Step 14 .
3. STEP 3. Check the wiring harness between joint connector (CAN2) C-05 and no connection connector C-51 for a short to power supply. Measure the voltage at joint connector (CAN2) C-05. Disconnect joint connector (CAN2), and measure the voltage at the wiring harness side of joint connector (CAN2). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN2) terminal 4 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN2) terminal 15 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 4. NO: Repair the wiring harness between joint connector (CAN2) C-05 and no connection connector C-51.
4. STEP 4. Check the wiring harness between joint connector (CAN2) C-05 and ETACS-ECU connector C-301 for a short to power supply. Measure the voltage at joint connector (CAN2) C-05. Disconnect joint connector (CAN2), and measure the voltage at the wiring harness side of joint connector (CAN2). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN2) terminal 6 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN2) terminal 19 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 5. NO: Go to Step 15 .
5. STEP 5. Check the wiring harness between joint connector (CAN3) C-124 and ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC > for a short to power supply. Measure the voltage at joint connector (CAN3) C-124. Disconnect joint connector (CAN3), and measure the voltage at the wiring harness side of joint connector (CAN3). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN3) terminal 6 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN3) terminal 19 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES < except RALLIART >: Go to Step 6. YES < RALLIART >: Go to Step 9 . NO: Go to Step 16 .
6. STEP 6. Check the wiring harness between joint connector (CAN3) C-124 and TCM connector C-41 for a short to power supply. Measure the voltage at joint connector (CAN3) C-124. Disconnect joint connector (CAN3), and measure the voltage at the wiring harness side of joint connector (CAN3). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN3) terminal 7 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN3) terminal 20 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 7. NO: Go to Step 17 .
7. STEP 7. Check the wiring harness between joint connector (CAN3) C-124 and ECM connector B-109 < except RALLIART > for a short to power supply. Measure the voltage at joint connector (CAN3) C-124. Disconnect joint connector (CAN3), and measure the voltage at the wiring harness side of joint connector (CAN3). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN3) terminal 4 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN3) terminal 15 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 8. NO: Go to Step 18 .
8. STEP 8. Check the wiring harness between joint connector (CAN3) C-124 and electric power steering-ECU connector C-141 < vehicles with electric power steering > for a short to power supply. Measure the voltage at joint connector (CAN3) C-124. Disconnect joint connector (CAN3), and measure the voltage at the wiring harness side of joint connector (CAN3). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN3) terminal 3 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN3) terminal 14 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Check intermediate connector C-128, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN2) C-05 and joint connector (CAN3) C-124. NO: Go to Step 19 .
9. STEP 9. Check the wiring harness between joint connector (CAN3) C-124 and shift lever connector C-49 for a short to power supply. Measure the voltage at joint connector (CAN3) C-124. Disconnect joint connector (CAN3), and measure the voltage at the wiring harness side of joint connector (CAN3). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN3) terminal 7 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN3) terminal 20 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 10. NO: Go to Step 20 .
10. STEP 10. Check the wiring harness between joint connector (CAN4) A-55 and ECM connector B-109 < RALLIART > for a short to power supply. Measure the voltage at joint connector (CAN4) A-55. Disconnect joint connector (CAN4), and measure the voltage at the wiring harness side of joint connector (CAN4). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN4) terminal 6 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN4) terminal 19 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 11. NO: Go to Step 18 .
11. STEP 11. Check the wiring harness between joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-120 for a short to power supply. Measure the voltage at joint connector (CAN4) A-55. Disconnect joint connector (CAN4), and measure the voltage at the wiring harness side of joint connector (CAN4). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN4) terminal 7 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN4) terminal 20 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 12. NO: Go to Step 21 .
12. STEP 12. Check the wiring harness between joint connector (CAN3) C-124 and joint connector (CAN2) C-05 for a short to ground. Measure the resistance at joint connector (CAN3) C-124. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3), and measure the resistance at the wiring harness side of joint connector (CAN3). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN3) terminal 5 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN3) terminal 16 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Check intermediate connector A-54, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN3) C-124 and joint connector (CAN4) A-55. NO: Check intermediate connector C-128, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN3) C-124 and joint connector (CAN2) C-05.
13. STEP 13. Using scan tool MB991958, diagnose the CAN bus line. (checking the steering wheel sensor for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect steering wheel sensor connector C-211. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between steering wheel sensor connector C-211 and joint connector (CAN2) C-05. NO: Check steering wheel sensor connector C-211, and repair if necessary. If the steering wheel sensor connector is in good condition, replace the steering wheel sensor.
14. STEP 14. Using scan tool MB991958, diagnose the CAN bus line. (checking the AWC-ECU for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect AWC-ECU connector C-51. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between AWC-ECU connector C-51 and joint connector (CAN2) C-05. NO: Check AWC-ECU connector C-51, and repair if necessary. If the AWC-ECU connector is in good condition, replace the AWC-ECU.
15. STEP 15. Check the wiring harness between joint connector (CAN2) C-05 and ETACS-ECU connector C-301 for short to power supply (voltage measurement). CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect ETACS-ECU connector and joint connector (CAN2), and measure at the wiring harness side. Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN2) terminal 6 and body ground. OK: 1.0 volts or less Measure the voltage between joint connector (CAN2) terminal 19 and body ground. OK: 1.0 volts or less Q: Do all the voltages measure 1.0 volts or less? YES: Check ETACS-ECU connector C-301, and repair if necessary. If the ETACS-ECU connector is in good condition, replace the ETACS-ECU. NO: Repair the wiring harness between ETACS-ECU connector C-301 and joint connector (CAN2) C-05.
16. STEP 16. Using scan tool MB991958, diagnose the CAN bus line. (checking the ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC > for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC >. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC > and joint connector (CAN3) C-124. NO: Check ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC >, and repair if necessary. If the ABS-ECU connector < vehicles without ASC > or ASC-ECU connector < vehicles with ASC > is in good condition, replace the ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC >.
17. STEP 17. Using scan tool MB991958, diagnose the CAN bus line. (checking the TCM for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect TCM connector C-41. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between TCM connector C-41 and joint connector (CAN3) C-124. NO: Check TCM connector C-41, and repair if necessary. If the TCM connector is in good condition, replace the TCM.
18. STEP 18. Using scan tool MB991958, diagnose the CAN bus line. (checking the ECM for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect ECM connector B-109. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between ECM connector B-109 and joint connector (CAN3) C-124 < except RALLIART >, or check intermediate connector A-54 < RALLIART >, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between ECM connector B-109 and joint connector (CAN4) A-55 < RALLIART >. NO: Check ECM connector B-109, and repair if necessary. If the ECM connector is in good condition, replace the ECM.
19. STEP 19. Using scan tool MB991958, diagnose the CAN bus line. (checking the electric power steering-ECU < vehicles with electric power steering > for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect electric power steering-ECU connector C-141 < vehicles with electric power steering >. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between electric power steering-ECU connector C-141 < vehicles with electric power steering > and joint connector (CAN3) C-124. NO: Check electric power steering-ECU connector C-141 < vehicles with electric power steering >, and repair if necessary. If the electric power steering-ECU connector < vehicles with electric power steering > is in good condition, replace the electric power steering-ECU < vehicles with electric power steering >.
20. STEP 20. Using scan tool MB991958, diagnose the CAN bus line. (checking the shift lever for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect shift lever connector C-49. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between shift lever connector C-49 and joint connector (CAN3) C-124. NO: Check shift lever connector C-49, and repair if necessary. If the shift lever connector is in good condition, replace the shift lever.
21. STEP 21. Using scan tool MB991958, diagnose the CAN bus line. (checking the transaxle assembly (TC-SST-ECU) for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect transaxle assembly (TC-SST-ECU) connector B-120. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between transaxle assembly (TC-SST-ECU) connector B-120 and joint connector (CAN4) A-55. NO: Check transaxle assembly (TC-SST-ECU) connector B-120, and repair if necessary. If the transaxle assembly (TC-SST-ECU) connector is in good condition, replace the transaxle assembly (TC-SST-ECU).

DIAGNOSTIC ITEM 6: Diagnose when the scan tool cannot receive the data sent by steering wheel sensor

Scheme 176

If the scan tool MB991958 cannot communicate with the TCM, this diagnosis result will be set.

If a communication flag is not set for the steering wheel sensor, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN2) or steering wheel sensor connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the steering wheel sensor and the joint connector (CAN2), power supply circuit to the steering wheel sensor]
3. Malfunction of the steering wheel sensor

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 177

Scheme 178

1. STEP 1. Check joint connector (CAN2) C-05 and steering wheel sensor connector C-211 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN2) C-05 and steering wheel sensor connector C-211 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN2) C-05 and steering wheel sensor connector C-211 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2) C-05 and steering wheel sensor connector C-211, and check the wiring harness. Check the wiring harness between joint connector (CAN2) C-05 (terminal 7) and steering wheel sensor connector C-211 (terminal 3) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN3) C-124 (terminal 20) and steering wheel sensor connector C-211 (terminal 4) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN2) C-211 and steering wheel sensor connector C-211 in good condition? YES: Check the power supply circuit of the steering wheel sensor. Refer to «DTC C121A: ABNORMALITY IN STEERING WHEEL SENSOR CALIBRATION»(/mitsubishi/lancer-evolution/x-2007-2016/remont/anti-locktraction-control/#active-stability-control-system-asc-except-lancer-evolution__dtc-c121a-abnormality-in-steering-wheel) . NO: Repair the wiring harness between joint connector (CAN2) C-05 and steering wheel sensor connector C-211.

DIAGNOSTIC ITEM 7: Diagnose when the scan tool cannot receive the data sent by AWC-ECU. < RALLIART >

Scheme 179

If the scan tool MB991958 cannot communicate with the AWC-ECU, this diagnosis result will be set.

TROUBLE JUDGEMENT CONDITIONS

If a communication flag is not set for the AWC-ECU, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN2) or AWC-ECU connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the AWC-ECU and the joint connector (CAN2), power supply circuit to the AWC-ECU]
3. Malfunction of the AWC-ECU

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 180

Scheme 181

1. STEP 1. Check joint connector (CAN2) C-05 and AWC-ECU connector C-51 and intermediate connector C-35 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN2) C-05 and AWC-ECU connector C-51 and intermediate connector C-35 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN2) C-05 and AWC-ECU connector C-51 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2) C-05 and AWC-ECU connector C-51, and check the wiring harness. Check the wiring harness between joint connector (CAN2) C-05 (terminal 4) and AWC-ECU connector C-51 (terminal 4) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN2) C-05 (terminal 15) and AWC-ECU connector C-51 (terminal 5) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN2) C-05 and AWC-ECU connector C-51 in good condition? YES: Check the power supply circuit of the AWC-ECU. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/automatic-trans/#twin-clutch-sportronic-shift-transmission-tc-sst-on-vehicle-service-except-lancer-evolution) < ACD >. NO: Repair the wiring harness between joint connector (CAN2) C-05 and AWC-ECU connector C-51.

DIAGNOSTIC ITEM 8: Diagnose when the scan tool cannot receive the data sent by ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC >

Scheme 182

If the scan tool MB991958 cannot communicate with the ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC >, this diagnosis result will be set.

If a communication flag is not set for the ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC >, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN3) or ABS-ECU connector < vehicles without ASC > or ASC-ECU connector < vehicles with ASC > improperly connected]
2. Malfunction of the wiring harness [open circuit between the ABS-ECU connector < vehicles without ASC > or ASC-ECU connector < vehicles with ASC > and the joint connector (CAN3), power supply circuit to the ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC >]
3. Malfunction of the ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles with ASC >

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 183

Scheme 184

Scheme 185

Scheme 186

1. STEP 1. Check joint connector (CAN3) C-124 and ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC > for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN3) C-124 and ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC > in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN3) C-124 and ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC > for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3) C-124 and ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC >, and check the wiring harness. Check the wiring harness between joint connector (CAN3) C-124 (terminal 6) and ABS-ECU connector A-03 (terminal 4) < vehicles without ASC > or ASC-ECU connector A-51 (terminal 12) < vehicles with ASC > OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN3) C-124 (terminal 19) and ABS-ECU connector A-03 (terminal 6) < vehicles without ASC > or ASC-ECU connector A-51 (terminal 13) < vehicles with ASC > OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN3) C-127 and ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC > in good condition? YES: Check the power supply circuit of the ABS-ECU < vehicles without ASC > or ASC-ECU < vehicles without ASC >. Refer to «INSPECTION PROCEDURE 8: ABS-ECU POWER SUPPLY CIRCUIT SYSTEM»(/mitsubishi/lancer-evolution/x-2007-2016/remont/anti-locktraction-control/#anti-lock-braking-system-abs-except-lancer-evolution) < vehicles without ASC > or «INSPECTION PROCEDURE 12: ASC-ECU POWER SUPPLY CIRCUIT SYSTEM»(/mitsubishi/lancer-evolution/x-2007-2016/remont/anti-locktraction-control/#active-stability-control-system-asc-except-lancer-evolution__inspection-procedure-12-asc-ecu-power-supply) < vehicles with ASC >. NO: Repair the wiring harness between joint connector (CAN3) C-124 and ABS-ECU connector A-03 < vehicles without ASC > or ASC-ECU connector A-51 < vehicles with ASC >.

DIAGNOSTIC ITEM 9: Diagnose when the scan tool cannot receive the data sent by shift lever. < RALLIART >)

Scheme 187

If the scan tool MB991958 cannot communicate with the shift lever, this diagnosis result will be set.

If a communication flag is not set for the shift lever, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN3) or shift lever connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the shift lever and the joint connector (CAN3), power supply circuit to the shift lever]
3. Malfunction of the shift lever

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 188

Scheme 189

1. STEP 1. Check joint connector (CAN3) C-124 and shift lever connector C-49 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN3) C-124 and shift lever connector C-49 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN3) C-124 and shift lever connector C-49. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3) C-124 and shift lever connector C-49, and check the wiring harness. Check the wiring harness between joint connector (CAN3) C-124 (terminal 7) and shift lever connector C-49 (terminal 2) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN3) C-124 (terminal 20) and shift lever connector C-49 (terminal 1) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN3) C-124 and shift lever connector C-49 in good condition? YES: Check the power supply circuit of the shift lever. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/automatic-trans/#twin-clutch-sportronic-shift-transmission-tc-sst-on-vehicle-service-except-lancer-evolution) < shift lever >. NO: Repair the wiring harness between joint connector (CAN3) C-124 and shift lever connector C-49.

DIAGNOSTIC ITEM 10: Diagnose when the scan tool cannot receive the data sent by TCM. < CVT >

Scheme 190

If the scan tool MB991958 cannot communicate with the TCM, this diagnosis result will be set.

If a communication flag is not set for the TCM, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN3) or TCM connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the TCM connector and the joint connector (CAN3), power supply circuit to the TCM]
3. Malfunction of the TCM

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 191

Scheme 192

1. STEP 1. Check joint connector (CAN3) C-124 and TCM connector C-41 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN3) C-124 and TCM connector C-41 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN3) C-124 and TCM connector C-41. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3) C-124 and TCM connector C-41, and check the wiring harness. Check the wiring harness between joint connector (CAN3) C-124 (terminal 7) and TCM connector C-41 (terminal 4) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN3) C-124 (terminal 20) and TCM connector C-41 (terminal 5) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN3) C-124 and TCM connector C-41 in good condition? YES: Check the power supply circuit of the TCM. Refer to «TROUBLE SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/automatic-trans/#continuously-variable-transaxle-on-vehicle-service-except-lancer-evolution__trouble-symptom-chart) . NO: Repair the wiring harness between joint connector (CAN3) C-124 and TCM connector C-41.

DIAGNOSTIC ITEM 11: Diagnose when the scan tool cannot receive the data sent by electric power steering-ECU. < vehicles with electric power steering >

Scheme 193

If the scan tool MB991958 cannot communicate with the electric power steering-ECU, this diagnosis result will be set.

If a communication flag is not set for the electric power steering-ECU, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN3), electric power steering-ECU connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the electric power steering-ECU connector and the joint connector (CAN3), power supply circuit to the electric power steering-ECU]
3. Malfunction of the electric power steering-ECU

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 194

Scheme 195

1. STEP 1. Check joint connector (CAN3) C-124 and electric power steering-ECU connector C-141 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN3) C-124 and electric power steering-ECU connector C-141 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN3) C-124 and electric power steering-ECU connector C-141 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3) C-124 and electric power steering-ECU C-141, and check the wiring harness. Check the wiring harness between joint connector (CAN3) C-124 (terminal 3) and electric power steering-ECU C-141 (terminal 4) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN3) C-124 (terminal 14) and electric power steering-ECU C-141 (terminal 3) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN3) C-124 and electric power steering-ECU connector C-141 in good condition? YES: Check the power supply circuit of the electric power steering-ECU. Refer to «INSPECTION PROCEDURE 1: SCAN TOOL CANNOT COMMUNICATE WITH ELECTRIC POWER STEERING SYSTEM < ECU POWER SUPPLY CIRCUIT SYSTEM CHECK >»(/mitsubishi/lancer-evolution/x-2007-2016/remont/electronic-steering/#electrical-power-steering-except-lancer-evolution) . NO: Repair the wiring harness between joint connector (CAN3) C-124 and electric power steering-ECU C-141.

DIAGNOSTIC ITEM 12: Diagnose when the scan tool cannot receive the data sent by transaxle assembly (TC-SST-ECU). < RALLIART >

Scheme 196

If the scan tool MB991958 cannot communicate with the transaxle assembly (TC-SST-ECU), this diagnosis result will be set.

If a communication flag is not set for the transaxle assembly (TC-SST-ECU), the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN4), transaxle assembly (TC-SST-ECU) connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the transaxle assembly (TC-SST-ECU) connector and the joint connector (CAN4), power supply circuit to the transaxle assembly (TC-SST-ECU)]
3. Malfunction of the transaxle assembly (TC-SST-ECU)

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 197

Scheme 198

1. STEP 1. Check joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-120 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-150 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-120 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) B-120, and check the wiring harness. Check the wiring harness between joint connector (CAN4) A-55 (terminal 7) and transaxle assembly (TC-SST-ECU) connector B-120 (terminal 5) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN4) A-55 (terminal 20) and transaxle assembly (TC-SST-ECU) connector B-120 (terminal 2) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-120 in good condition? YES: Check the power supply circuit of the transaxle assembly (TC-SST-ECU). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/automatic-trans/#twin-clutch-sportronic-shift-transmission-tc-sst-on-vehicle-service-except-lancer-evolution) < TC-SST >. NO: Repair the wiring harness between joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-120.

DIAGNOSTIC ITEM 13: Diagnose when the scan tool cannot receive the data sent by ECM

Scheme 199

If the scan tool MB991958 cannot communicate with the ECM, this diagnosis result will be set.

If a communication flag is not set for the ECM, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN3) < except RALLIART >, joint connector (CAN4) < RALLIART >, ECM connector or intermediate connector < RALLIART > improperly connected]
2. Malfunction of the wiring harness [open circuit between the ECM connector and the joint connector (CAN3) < except RALLIART > or the joint connector (CAN4) < RALLIART >, power supply circuit to the ECM]
3. Malfunction of the ECM

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 200

Scheme 201

Scheme 202

Scheme 203

1. STEP 1. Check joint connector (CAN3) C-124 < except RALLIART >, joint connector (CAN4) A-55 < RALLIART >, ECM connector B-109 and intermediate connector A-54 < RALLIART > for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN3) C-124 < except RALLIART >, joint connector (CAN4) A-55 < RALLIART >, ECM connector B-109 and intermediate connector A-54 < RALLIART > in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN3) C-124 < except RALLIART > or joint connector (CAN4) A-55 < RALLIART > and ECM connector B-109. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3) C-124 < except RALLIART > or joint connector (CAN4) A-55 < RALLIART > and ECM connector B-109, and check the wiring harness. Check the wiring harness between joint connector (CAN3) C-124 (terminal 4) and ECM connector B-109 (terminal 90) < except RALLIART > OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN3) C-124 (terminal 15) and ECM connector B-109 (terminal 91) < except RALLIART > OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN4) A-55 (terminal 6) and ECM connector B-109 (terminal 90) < RALLIART > OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN4) A-55 (terminal 19) and ECM connector B-109 (terminal 91) < RALLIART > OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN3) C-124 < except RALLIART > or joint connector (CAN4) A-55 < RALLIART > and ECM connector B-109 in good condition? YES: Check the power supply circuit of the ECM. Refer to «SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/testing-diagnostics/#multiport-fuel-injection-mfi-20l-non-turbo-except-lancer-evolution) for 2.0L Non-Turbo < (except RALLIART) >, «SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/testing-diagnostics/#multiport-fuel-injection-mfi-20l-turbo-except-lancer-evolution) for 2.0L Turbo < RALLIART > or «SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/testing-diagnostics/#multiport-fuel-injection-mfi-24l-except-lancer-evolution) for 2.4L . NO: Repair the wiring harness between joint connector (CAN3) C-124 < except RALLIART > or joint connector (CAN4) A-55 < RALLIART > and ECM connector B-109.

DIAGNOSTIC ITEM 14: Diagnose the lines between the ETACS-ECU and joint connector (CAN2)

Scheme 204

If a failure is present in the wiring harness between the ETACS-ECU connector and the joint connector (CAN2), this diagnosis result will be set.

If a communication flag is not set for some of the ECUs on the CAN-C line, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN2) or ETACS-ECU connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the ETACS-ECU connector and the joint connector (CAN2), power supply circuit to the ECM]
3. Malfunction of the ETACS-ECU

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 205

Scheme 206

1. STEP 1. Check joint connector (CAN2) C-05 and ETACS-ECU connector C-301 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN2) C-05 and ETACS-ECU connector C-301 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN2) C-05 and ETACS-ECU connector C-301 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2) C-05 and ETACS-ECU connector C-301, and check the wiring harness. Check the wiring harness between joint connector (CAN2) C-05 (terminal 6) and ETACS-ECU connector C-301 (terminal 9) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN2) C-05 (terminal 19) and ETACS-ECU connector C-301 (terminal 8) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN2) C-104 and ETACS-ECU connector C-301 in good condition? YES: Go to Step 3. NO: Repair the wiring harness between joint connector (CAN2) C-104 and ETACS-ECU connector C-301.
3. STEP 3. Using scan tool MB991958, diagnose the CAN bus line. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool screen is as shown in the illustration. Q: Does the scan tool screen correspond to the illustration? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/hoistjack/#general-information-except-lancer-evolution__how-to-cope-with-intermittent-malfunctions) ). NO: Replace the ETACS-ECU.

DIAGNOSTIC ITEM 15: Diagnose the lines between joint connector (CAN2) and joint connector (CAN3)

Scheme 207

If a failure is present in the wiring harness between the joint connector (CAN2) and the joint connector (CAN3), this diagnosis result will be set.

If a communication flag is not set for some of the ECUs on the CAN-C line, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN2), joint connector (CAN3) or intermediate connector failed]
2. Malfunction of the wiring harness [open circuit between joint connector (CAN2) and joint connector (CAN3)]

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 208

Scheme 209

1. STEP 1. Check joint connector (CAN2) C-05, joint connector (CAN3) C-124 and intermediate connector C-128 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN2) C-05, joint connector (CAN3) C-124 and intermediate connector C-128 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN2) C-05 and joint connector (CAN3) C-124 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN2) C-05 and joint connector (CAN3) C-124, and check the wiring harness. Check the wiring harness between joint connector (CAN2) C-05 (terminal 5) and joint connector (CAN3) C-124 (terminal 5) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN2) C-05 (terminal 16) and joint connector (CAN3) C-124 (terminal 16) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN2) C-05 and joint connector (CAN3) C-124 in good condition? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/hoistjack/#general-information-except-lancer-evolution__how-to-cope-with-intermittent-malfunctions) ). NO: Repair the wiring harness between joint connector (CAN2) C-05 and joint connector (CAN3) C-124.

DIAGNOSTIC ITEM 16: Diagnose the lines between joint connector (CAN3) and joint connector (CAN4). < RALLIART >

Scheme 210

If a failure is present in the wiring harness between the joint connector (CAN3) and the joint connector (CAN4), this diagnosis result will be set.

If a communication flag is not set for some of the ECUs on the CAN-C line, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN3), joint connector (CAN4) or intermediate connector failed]
2. Malfunction of the wiring harness [open circuit between joint connector (CAN3) and joint connector (CAN4)]

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 211

Scheme 212

1. STEP 1. Check joint connector (CAN3) C-127, joint connector (CAN4) A-55 and intermediate connector A-54 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN3) C-124, joint connector (CAN4) A-55 and intermediate connector A-54 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN3) C-124 and joint connector (CAN4) A-55 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN3) C-124 and joint connector (CAN4) A-55, and check the wiring harness. Check the wiring harness between joint connector (CAN3) C-124 (terminal 4) and joint connector (CAN4) A-55 (terminal 5) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN3) C-124 (terminal 15) and joint connector (CAN4) A-55 (terminal 16) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN3) C-124 and joint connector (CAN4) A-55 in good condition? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/hoistjack/#general-information-except-lancer-evolution__how-to-cope-with-intermittent-malfunctions) ). NO: Repair the wiring harness between joint connector (CAN3) C-124 and joint connector (CAN4) A-55.

DIAGNOSTIC ITEM 17: Diagnose when the scan tool cannot receive the data sent by KOS-ECU. < vehicles with KOS >

Scheme 213

If the scan tool MB991958 cannot communicate with the KOS-ECU, this diagnosis result will be set.

If a communication flag is not set for the KOS-ECU, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN1), KOS-ECU connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the KOS-ECU connector and the joint connector (CAN1), power supply circuit to the KOS-ECU]
3. Malfunction of the KOS-ECU

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 214

Scheme 215

1. STEP 1. Check joint connector (CAN1) C-06 and KOS-ECU connector C-31 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN1) C-06 and KOS-ECU connector C-31 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1) C-06 and KOS-ECU connector C-31, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 9) and KOS-ECU connector C-31 (terminal 1) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 22) and KOS-ECU connector C-31 (terminal 2) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 in good condition? YES: Check the power supply circuit of the KOS-ECU. Refer to «TROUBLE SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/door-locks-anti-theft-systems/#keyless-operation-system-kos-except-lancer-evolution__trouble-symptom-chart) . NO: Repair the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31.

DIAGNOSTIC ITEM 18: Diagnose when the scan tool cannot receive the data sent by WCM. < vehicles with WCM >

Scheme 216

If the scan tool MB991958 cannot communicate with the WCM, this diagnosis result will be set.

If a communication flag is not set for the WCM, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN1), WCM connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the WCM connector and the joint connector (CAN1), power supply circuit to the WCM]
3. Malfunction of the WCM

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 217

Scheme 218

1. STEP 1. Check joint connector (CAN1) C-06 and WCM connector C-09 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN1) C-06 and WCM connector C-07 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1) C-06 and WCM connector C-09, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 5) and WCM connector C-09 (terminal 11) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 16) and WCM connector C-09 (terminal 10) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and WCM connector C-07 in good condition? YES: Check the power supply circuit of the WCM. Refer to «TROUBLE SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#wireless-control-module-wcm-except-lancer-evolution__trouble-symptom-chart) . NO: Repair the wiring harness between joint connector (CAN1) C-06 and WCM connector C-07.

DIAGNOSTIC ITEM 19: Diagnose when the scan tool cannot receive the data sent by SRS-ECU

Scheme 219

If the scan tool MB991958 cannot communicate with the SRS-ECU, this diagnosis result will be set.

If a communication flag is not set for the SRS-ECU, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN1), SRS-ECU connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the SRS-ECU connector and the joint connector (CAN1), power supply circuit to the SRS-ECU]
3. Malfunction of the SRS-ECU

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 220

Scheme 221

1. STEP 1. Check joint connector (CAN1) C-06 and SRS-ECU connector C-122 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN1) C-06 and SRS-ECU connector C-122 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1) C-06 and SRS-ECU connector C-122, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 8) and SRS-ECU connector C-122 (terminal 15) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 21) and SRS-ECU connector C-122 (terminal 16) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 in good condition? YES: Check the power supply circuit of the SRS-ECU. Refer to «TROUBLE SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/airbag/#supplemental-restraint-system-srs-except-lancer-evolution) . NO: Repair the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122.

DIAGNOSTIC ITEM 20: Diagnose when the scan tool cannot receive the data sent by A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C >

Scheme 222

If the scan tool MB991958 cannot communicate with the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C >, this diagnosis result will be set.

If a communication flag is not set for the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C >, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN1), A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C > connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C > connector and the joint connector (CAN1), power supply circuit to the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C >]
3. Malfunction of the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C >

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 223

Scheme 224

1. STEP 1. Check joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C >, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 1) and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > (terminal 11) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 12) and A/C-ECU connector C-20 or heater control unit connector C-48 < vehicles without A/C > (terminal 12) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > in good condition? YES: Check the power supply circuit of the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C >. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/automatic-hvac-system/#heating-air-conditioning-and-ventilation-except-lancer-evolution__diagnostic-trouble-code-chart) for Manual A/C And Heater Diagnosis or «DIAGNOSTIC TROUBLE CODE CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/automatic-hvac-system/#automatic-air-conditioning-except-lancer-evolution__diagnostic-trouble-code-chart) for Automatic A/C Diagnosis . NO: Repair the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C >.

DIAGNOSTIC ITEM 21: Diagnose when the scan tool cannot receive the data sent by radio and CD player. < vehicles with radio and CD player>

Scheme 225

If the scan tool MB991958 cannot communicate with the radio and CD player, this diagnosis result will be set.

If a communication flag is not set for the radio and CD player, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN1), radio and CD player connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the radio and CD player connector and the joint connector (CAN1), power supply circuit to the radio and CD player]
3. Malfunction of the radio and CD player

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 226

Scheme 227

1. STEP 1. Check joint connector (CAN1) C-06 and radio and CD player connector C-104 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN1) C-06 and radio and CD player connector C-104 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and radio and CD player connector C-104 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1) C-06 and radio and CD player connector C-104, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 7) and radio and CD player connector C-104 (terminal 23) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 20) and radio and CD player connector C-104 (terminal 33) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and radio and CD player connector C-104 in good condition? YES: Check the power supply circuit of the radio and CD player. Refer to «TROUBLE SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/entertainment-systems/#radio-and-cd-player-except-lancer-evolution__trouble-symptom-chart) . NO: Repair the wiring harness between joint connector (CAN1) C-06 and radio and CD player connector C-104.

DIAGNOSTIC ITEM 22: Diagnose when the scan tool cannot receive the data sent by CAN box unit < vehicles with MMCS >

Scheme 228

If the scan tool MB991958 cannot communicate with the CAN box unit, this diagnosis result will be set.

If a communication flag is not set for the CAN box unit, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN1), CAN box unit connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the CAN box unit connector and the joint connector (CAN1), power supply circuit to the CAN box unit]
3. Malfunction of the CAN box unit

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 229

Scheme 230

1. STEP 1. Check joint connector (CAN1) C-06, CAN box unit connector C-108 and intermediate connector C-105 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN1) C-06, CAN box unit connector C-108 and intermediate connector C-105 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1) C-06 and CAN box unit connector C-108, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 7) and CAN box unit connector C-108 (terminal 8) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 20) and CAN box unit connector C-108 (terminal 9) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108 in good condition? YES: Check the power supply circuit of the CAN box unit. Refer to «TROUBLE SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/entertainment-systems/#mitsubishi-multi-communication-system-mmcs-except-lancer-evolution__trouble-symptom-chart) . NO: Repair the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108.

DIAGNOSTIC ITEM 23: Diagnose when the scan tool cannot receive the data sent by combination meter

Scheme 231

If the scan tool MB991958 cannot communicate with the combination meter, this diagnosis result will be set.

If a communication flag is not set for the combination meter, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN1), combination meter connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the combination meter connector and the joint connector (CAN1), power supply circuit to the combination meter]
3. Malfunction of the combination meter

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 232

Scheme 233

1. STEP 1. Check joint connector (CAN1) C-06 and combination meter connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN1) C-06 and combination meter connector C-04 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1) C-06 and combination meter connector C-04, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 3) and combination meter connector C-04 (terminal 14) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 14) and combination meter connector C-04 (terminal 15) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 in good condition? YES: Check the power supply circuit of the combination meter. Refer to «TROUBLE SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/gauges-instrument-panels/#combination-meter-except-lancer-evolution__trouble-symptom-chart) . NO: Repair the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04.

DIAGNOSTIC ITEM 24: Diagnose when the scan tool cannot receive the data sent by occupant classification-ECU

Scheme 234

If the scan tool MB991958 cannot communicate with the occupant classification-ECU, this diagnosis result will be set.

If a communication flag is not set for the occupant classification-ECU, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN1), occupant classification-ECU connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the occupant classification-ECU connector and the joint connector (CAN1), power supply circuit to the occupant classification-ECU]
3. Malfunction of the occupant classification-ECU

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 235

Scheme 236

1. STEP 1. Check joint connector (CAN1) C-06, occupant classification-ECU connector D-35, D-35-2 and intermediate connector C-35 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN1) C-06, occupant classification-ECU connector D-35, D-35-2 and intermediate connector C-35 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 11) and occupant classification-ECU connector D-35-2 (terminal 24) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 24) and occupant classification-ECU connector D-35-2 (terminal 25) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2 in good condition? YES: Check the power supply circuit of the occupant classification-ECU. Refer to «TROUBLE SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/airbag/#supplemental-restraint-system-srs-except-lancer-evolution) . NO: Repair the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2.

DIAGNOSTIC ITEM 25: Diagnose when the scan tool cannot receive the data sent by satellite radio tuner < vehicles with satellite radio tuner>

Scheme 237

If the scan tool MB991958 cannot communicate with the satellite radio tuner, this diagnosis result will be set.

If a communication flag is not set for the satellite radio tuner, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN1), satellite radio tuner connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the satellite radio tuner connector and the joint connector (CAN1), power supply circuit to the satellite radio tuner]
3. Malfunction of the satellite radio tuner

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 238

Scheme 239

1. STEP 1. Check joint connector (CAN1) C-06 and satellite radio tuner connector C-17 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN1) C-06 and satellite radio tuner connector C-17 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1) C-06 and satellite radio tuner connector C-17, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 2) and satellite radio tuner connector C-17 (terminal 4) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 13) and satellite radio tuner connector C-17 (terminal 11) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17 in good condition? YES: Check the power supply circuit of the satellite radio tuner. Refer to «TROUBLE SYMPTOM CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/entertainment-systems/#satellite-radio-tuner-except-lancer-evolution__trouble-symptom-chart) . NO: Repair the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17.

DIAGNOSTIC ITEM 26: Short to power supply or ground in both CAN_H and CAN_L lines

Scheme 240

If a short to power supply or ground is present in both CAN_H and CAN_L lines, this diagnosis result will be set.

If a communication flag is set for the ETACS-ECU, no communication is present through the CAN-B line, and diagnostic trouble code U0019 is set, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector (ETACS-ECU connector improperly connected)
2. Malfunction of the wiring harness (CAN_H and CAN_L lines are short to power supply or ground on the CAN-B line.)
3. Malfunction of ECUs

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

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1. STEP 1. Check the wiring harness between ETACS-ECU connector C-301 and body ground for a short to power supply. Measure the voltage at ETACS-ECU connector C-301. CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect ETACS-ECU connector C-301, and measure the voltage at the wiring harness side of ETACS-ECU connector. Turn the ignition switch to the ON position. Measure the voltage between ETACS-ECU connector terminal 6 and body ground. OK: 4.7 volts or less Measure the voltage between ETACS-ECU connector terminal 7 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 2. NO: Go to Step 12 .
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 3 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 14 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES < vehicles with KOS >: Go to Step 3. YES < vehicles with WCM >: Go to Step 4 . NO < vehicles without KOS and WCM >: Go to Step 22 .
3. STEP 3. Check the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 9 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 22 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 5 . NO: Go to Step 23 .
4. STEP 4. Check the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 5 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 16 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 5. NO: Go to Step 24 .
5. STEP 5. Check the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 8 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 21 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 6. NO: Go to Step 25 .
6. STEP 6. Check the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 11 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 24 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 7. NO: Go to Step 26 .
7. STEP 7. Check the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 1 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 12 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES < vehicles without MMCS >: Go to Step 8. YES < vehicles with MMCS >: Go to Step 9 . NO: Go to Step 27 .
8. STEP 8. Check the wiring harness between joint connector (CAN1) C-06 and radio and CD player connector C-104 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 7 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 20 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES < vehicles without satellite radio >: Go to Step 11 . YES < vehicles with satellite radio >: Go to Step 10 . NO: Go to Step 28 .
9. STEP 9. Check the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 7 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 20 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES < vehicles without satellite radio >: Go to Step 11 . YES < vehicles with satellite radio >: Go to Step 10. NO: Go to Step 29 .
10. STEP 10. Check the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 2 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 13 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 11. NO: Go to Step 30 .
11. STEP 11. Check the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1) and ETACS-ECU connector C-301, and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 6 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 19 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 31 . NO: Repair the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301.
12. STEP 12. Check the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 3 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 14 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES < vehicles with KOS >: Go to Step 13. YES < vehicles with WCM >: Go to Step 14 . NO < vehicles without KOS and WCM >: Go to Step 22 .
13. STEP 13. Check the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 9 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 22 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 15 . NO: Go to Step 23 .
14. STEP 14. Check the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 5 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 16 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 15. NO: Go to Step 24 .
15. STEP 15. Check the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 8 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 21 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 16. NO: Go to Step 25 .
16. STEP 16. Check the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 11 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 24 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 17. NO: Go to Step 26 .
17. STEP 17. Check the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 1 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 12 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES < vehicles without MMCS >: Go to Step 18. YES < vehicles with MMCS >: Go to Step 19 . NO: Go to Step 27 .
18. STEP 18. Check the wiring harness between joint connector (CAN1) C-06 and radio and CD player connector C-104 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 7 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 20 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES < vehicles without satellite radio >: Go to Step 21 . YES < vehicles with satellite radio >: Go to Step 20 . NO: Go to Step 28 .
19. STEP 19. Check the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 7 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 20 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES < vehicles without satellite radio >: Go to Step 21 . YES < vehicles with satellite radio >: Go to Step 20. NO: Go to Step 29 .
20. STEP 20. Check the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 2 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 13 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 21. NO: Go to Step 30 .
21. STEP 21. Check the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 6 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 19 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 31 . NO: Repair the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301.
22. STEP 22. Using scan tool MB991958, diagnose the CAN bus line. (checking the combination meter for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect combination meter connector C-04. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04. NO: Check combination meter connector C-04, and repair if necessary. If the combination meter connector is in good condition, replace the combination meter.
23. STEP 23. Using scan tool MB991958, diagnose the CAN bus line. (checking the KOS-ECU for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect KOS-ECU connector C-31. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31. NO: Check KOS-ECU connector C-31, and repair if necessary. If the KOS-ECU connector is in good condition, replace the KOS-ECU.
24. STEP 24. Using scan tool MB991958, diagnose the CAN bus line. (checking the WCM for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect WCM connector C-09. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09. NO: Check WCM connector C-09, and repair if necessary. If the WCM connector is in good condition, replace the WCM.
25. STEP 25. Using scan tool MB991958, diagnose the CAN bus line. (checking the SRS-ECU for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect SRS-ECU connector C-122. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122. NO: Check SRS-ECU connector C-122, and repair if necessary. If the SRS-ECU connector is in good condition, replace the SRS-ECU.
26. STEP 26. Using scan tool MB991958, diagnose the CAN bus line. (checking the occupant classification-ECU for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect occupant classification-ECU connector D-35-2. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2. NO: Check occupant classification-ECU connector D-35-2, and repair if necessary. If the occupant classification-ECU connector is in good condition, replace the occupant classification-ECU.
27. STEP 27. Using scan tool MB991958, diagnose the CAN bus line. (checking the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C > for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C >. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C >. NO: Check A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C >, and repair if necessary. If the A/C-ECU < vehicles with A/C > or heater control unit connector < vehicles without A/C > connector is in good condition, replace the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C >.
28. STEP 28. Using scan tool MB991958, diagnose the CAN bus line. (checking the radio and CD player for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect radio and CD player connector C-104. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and radio and CD player connector C-104. NO: Check radio and CD player connector C-104, and repair if necessary. If the radio and CD player connector is in good condition, replace the radio and CD player.
29. STEP 29. Using scan tool MB991958, diagnose the CAN bus line. (checking the CAN box unit for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect CAN box unit connector C-108. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108. NO: Check CAN box unit connector C-108, and repair if necessary. If the CAN box unit connector is in good condition, replace the CAN box unit.
30. STEP 30. Using scan tool MB991958, diagnose the CAN bus line. (checking the satellite radio tuner for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect satellite radio tuner connector C-17. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17. NO: Check satellite radio tuner connector C-17, and repair if necessary. If the satellite radio tuner connector is in good condition, replace the satellite radio tuner.
31. STEP 31. Using scan tool MB991958, diagnose the CAN bus line. (trouble symptom check) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/hoistjack/#general-information-except-lancer-evolution__how-to-cope-with-intermittent-malfunctions) ). NO: Check the ETACS-ECU connector C-301, and repair if necessary. If the ETACS-ECU connector is in good condition, replace the ETACS-ECU.

DIAGNOSTIC ITEM 27: Diagnose the ETACS-ECU, joint connector (CAN1) or lines between ETACS-ECU and joint connector (CAN1)

Scheme 283

If a failure is present in the wiring harness wires between the ETACS-ECU connector, the joint connector (CAN1), the ETACS-ECU connector and the joint connector (CAN1), this diagnosis result will be set.

If a communication flag is set for none of the ECUs on the CAN-B line, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector [joint connector (CAN1) or ETACS-ECU connector improperly connected]
2. Malfunction of the wiring harness [open circuit between the ETACS-ECU connector and the joint connector (CAN1)]
3. Malfunction of the ETACS-ECU

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 284

Scheme 285

1. STEP 1. Check joint connector (CAN1) C-06 and ETACS-ECU connector C-301 for loose, corroded or damaged terminals, or terminals pushed back in the connector. CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Q: Are joint connector (CAN1) C-06 and ETACS-ECU connector C-301 in good condition? YES: Go to Step 2. NO: Repair the damaged parts.
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1) C-06 and ETACS-ECU connector C-301, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 6) and ETACS-ECU connector C-301 (terminal 6) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 19) and ETACS-ECU connector C-301 (terminal 7) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301 in good condition? YES: Go to Step 3. NO: Repair the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301.
3. STEP 3. Using scan tool MB991958, diagnose the CAN bus line. (trouble symptom check) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/hoistjack/#general-information-except-lancer-evolution__how-to-cope-with-intermittent-malfunctions) ). NO: Replace the ETACS-ECU.

DIAGNOSTIC ITEM 28: Short to power supply or ground, open circuit or line-to-line short in the CAN-B bus lines

Scheme 286

If a short to power supply or ground, open circuit or line-to-line short is present at either CAN_H or CAN_L side on the CAN-B lines, this diagnosis result will be set.

When CAN-B lines communication is normal, and diagnostic trouble code U0019 is set, the ETACS-ECU determines that there is a failure.

1. Malfunction of the connector (short to power supply or ground in connector or improperly connected)
2. Malfunction of the wiring harness (short to power supply or ground, open circuit or line-to-line short in CAN bus lines)
3. Faulty ECU(s) (internal short to power supply or ground)

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 287

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Scheme 296

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Scheme 298

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Scheme 301

Scheme 302

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Scheme 310

Scheme 311

Scheme 312

1. STEP 1. Check the wiring harness between ETACS-ECU connector C-301 and body ground for a short to ground. Measure the resistance at ETACS-ECU connector C-301. CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: A digital multimeter should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: The test wiring harness should be used. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect ETACS-ECU connector C-301, and measure the voltage at the wiring harness side of ETACS-ECU connector. Measure the resistance between ETACS-ECU connector terminal 6 and body ground. OK: 1 kilo ohm or more Measure the resistance between ETACS-ECU connector terminal 7 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 2. NO: Go to Step 12 .
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 3 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 14 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES < vehicles with KOS >: Go to Step 3. YES < vehicles with WCM >: Go to Step 4 . NO < vehicles without KOS and WCM >: Go to Step 44 .
3. STEP 3. Check the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 9 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 22 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 5 . NO: Go to Step 45 .
4. STEP 4. Check the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 5 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 16 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 5. NO: Go to Step 46 .
5. STEP 5. Check the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 8 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 21 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 6. NO: Go to Step 47 .
6. STEP 6. Check the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 11 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 24 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 7. NO: Go to Step 48 .
7. STEP 7. Check the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 1 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 12 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES < vehicles without MMCS >: Go to Step 8. YES < vehicles with MMCS >: Go to Step 9 . NO: Go to Step 49 .
8. STEP 8. Check the wiring harness between joint connector (CAN1) C-06 and radio and CD player or CD changer connector C-104 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 7 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 20 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES < vehicles without satellite radio >: Go to Step 11 . YES < vehicles with satellite radio >: Go to Step 10 . NO: Go to Step 50 .
9. STEP 9. Check the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 7 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 20 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES < vehicles without satellite radio >: Go to Step 11 . YES < vehicles with satellite radio >: Go to Step 10. NO: Go to Step 51 .
10. STEP 10. Check the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 2 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 13 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 11. NO: Go to Step 52 .
11. STEP 11. Check the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301 for a short to ground. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1) and ETACS-ECU connector C-301, and measure the resistance at the wiring harness side of joint connector (CAN1). Measure the resistance between joint connector (CAN1) terminal 6 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 19 and body ground. OK: 1 kilo ohm or more Q: Do all the resistances measure 1 kilo ohm or more? YES: Go to Step 53 . NO: Repair the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301.
12. STEP 12. Check the wiring harness between ETACS-ECU connector C-301 and body ground for a short to power supply. Measure the voltage at ETACS-ECU connector C-301. Disconnect ETACS-ECU connector C-301, and measure the voltage at the wiring harness side of ETACS-ECU connector. Turn the ignition switch to the ON position. Measure the voltage between ETACS-ECU connector terminal 6 and body ground. OK: 4.7 volts or less Measure the voltage between ETACS-ECU connector terminal 7 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 23 . NO: Go to Step 13.
13. STEP 13. Check the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Connect the negative battery terminal. Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 3 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 14 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES < vehicles with KOS >: Go to Step 14. YES < vehicles with WCM >: Go to Step 15 . NO < vehicles without KOS and WCM >: Go to Step 44 .
14. STEP 14. Check the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 9 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 22 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 16 . NO: Go to Step 45 .
15. STEP 15. Check the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 5 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 16 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 16. NO: Go to Step 46 .
16. STEP 16. Check the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 8 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 21 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 17. NO: Go to Step 47 .
17. STEP 17. Check the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 11 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 24 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 18. NO: Go to Step 48 .
18. STEP 18. Check the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 1 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 12 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES < vehicles without MMCS >: Go to Step 19. YES < vehicles with MMCS >: Go to Step 20 . NO: Go to Step 49 .
19. STEP 19. Check the wiring harness between joint connector (CAN1) C-06 and radio and CD player or CD changer connector C-104 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 7 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 20 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES < vehicles without satellite radio >: Go to Step 22 . YES < vehicles with satellite radio >: Go to Step 21 . NO: Go to Step 50 .
20. STEP 20. Check the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 7 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 20 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES < vehicles without satellite radio >: Go to Step 22 . YES < vehicles with satellite radio >: Go to Step 21. NO: Go to Step 51 .
21. STEP 21. Check the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 2 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 13 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 22. NO: Go to Step 52 .
22. STEP 22. Check the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1). Turn the ignition switch to the ON position. Measure the voltage between joint connector (CAN1) terminal 6 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 19 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES: Go to Step 53 . NO: Repair the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301.
23. STEP 23. Check the wiring harness for line-to-line short. Measure the resistance at ETACS-ECU connector C-301 CAUTION: Disconnect the negative battery terminal. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect ETACS-ECU connector C-301, and check that there is continuity at the harness side of ETACS-ECU. Check that there is continuity between ETACS-ECU connector terminals 6 and 7. OK: No continuity Q: Is the check result normal? YES: Go to Step 34 . NO: Go to Step 24.
24. STEP 24. Check the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1). Check that there is continuity between joint connector (CAN1) terminals 3 and 14. OK: No continuity Q: Is the check result normal? YES < vehicles with KOS >: Go to Step 25. YES < vehicles with WCM >: Go to Step 26 . NO < vehicles without KOS and WCM >: Go to Step 44 .
25. STEP 25. Check the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1). Check that there is continuity between joint connector (CAN1) terminals 9 and 22. OK: No continuity Q: Is the check result normal? YES: Go to Step 27 . NO: Go to Step 45 .
26. STEP 26. Check the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1). Check that there is continuity between joint connector (CAN1) terminals 5 and 16. OK: No continuity Q: Is the check result normal? YES: Go to Step 27. NO: Go to Step 46 .
27. STEP 27. Check the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1). Check that there is continuity between joint connector (CAN1) terminals 8 and 21. OK: No continuity Q: Is the check result normal? YES: Go to Step 28. NO: Go to Step 47 .
28. STEP 28. Check the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1). Check that there is continuity between joint connector (CAN1) terminals 11 and 24. OK: No continuity Q: Is the check result normal? YES: Go to Step 29. NO: Go to Step 48 .
29. STEP 29. Check the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > for line-to-line short. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1). Check that there is continuity between joint connector (CAN1) terminals 1 and 12. OK: No continuity Q: Is the check result normal? YES < vehicles without MMCS >: Go to Step 30. YES < vehicles with MMCS >: Go to Step 31 . NO: Go to Step 49 .
30. STEP 30. Check the wiring harness between joint connector (CAN1) C-06 and radio and CD player or CD changer connector C-104 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1). Check that there is continuity between joint connector (CAN1) terminals 7 and 20. OK: No continuity Q: Is the check result normal? YES < vehicles without satellite radio >: Go to Step 33 . YES < vehicles with satellite radio >: Go to Step 32 . NO: Go to Step 50 .
31. STEP 31. Check the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1). Check that there is continuity between joint connector (CAN1) terminals 7 and 20. OK: No continuity Q: Is the check result normal? YES < vehicles without satellite radio >: Go to Step 33 . YES < vehicles with satellite radio >: Go to Step 32. NO: Go to Step 51 .
32. STEP 32. Check the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1). Check that there is continuity between joint connector (CAN1) terminals 2 and 13. OK: No continuity Q: Is the check result normal? YES: Go to Step 33. NO: Go to Step 52 .
33. STEP 33. Check the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06. Disconnect joint connector (CAN1) and ETACS-ECU connector C-301, and check that there is continuity at the harness side of joint connector (CAN1). Check that there is continuity between joint connector (CAN1) terminals 6 and 19. OK: No continuity Q: Is the check result normal? YES: Go to Step 53 . NO: Repair the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301.
34. STEP 34. Check the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . Disconnect joint connector (CAN1) C-06 and combination meter connector C-301, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 3) and combination meter connector C-04 (terminal 14) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 14) and combination meter connector C-04 (terminal 15) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 in good condition? YES < vehicles with KOS >: Go to Step 35. YES < vehicles with WCM >: Go to Step 36 . NO < vehicles without KOS and WCM >: Go to Step 44 .
35. STEP 35. Check the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 for open circuit. Disconnect joint connector (CAN1) C-06 and KOS-ECU connector C-31, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 9) and KOS-ECU connector C-31 (terminal 1) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 22) and KOS-ECU connector C-31 (terminal 2) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 in good condition? YES: Go to Step 37 . NO: Go to Step 45 .
36. STEP 36. Check the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 for open circuit. Disconnect joint connector (CAN1) C-06 and WCM connector C-09, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 5) and WCM connector C-09 (terminal 11) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 16) and WCM connector C-09 (terminal 10) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 in good condition? YES: Go to Step 37. NO: Go to Step 46 .
37. STEP 37. Check the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 for open circuit. Disconnect joint connector (CAN1) C-06 and SRS-ECU connector C-122, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 8) and SRS-ECU connector C-122 (terminal 15) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 21) and SRS-ECU connector C-122 (terminal 16) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 in good condition? YES: Go to Step 38. NO: Go to Step 47 .
38. STEP 38. Check the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2 for open circuit. Disconnect joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 11) and occupant classification-ECU connector D-35-2 (terminal 24) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 24) and occupant classification-ECU connector D-35-2 (terminal 25) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2 in good condition? YES: Go to Step 39. NO: Go to Step 48 .
39. STEP 39. Check the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > for open circuit. Disconnect joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C >, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 1) and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > (terminal 11) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 12) and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > (terminal 12) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C > in good condition? YES < vehicles without MMCS >: Go to Step 41 . YES < vehicles with MMCS >: Go to Step 40. NO: Go to Step 48 .
40. STEP 40. Check the wiring harness between joint connector (CAN1) C-06 and radio and CD player or CD changer connector C-104 for open circuit. Disconnect joint connector (CAN1) C-06 and radio and CD player or CD changer connector C-104, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 7) and radio and CD player or CD changer connector C-104 (terminal 23) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 20) and radio and CD player or CD changer connector C-104 (terminal 33) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and radio and CD player or CD changer connector C-104 in good condition? YES < vehicles without satellite radio >: Go to Step 43 . YES < vehicles with satellite radio >: Go to Step 42 . NO: Go to Step 50 .
41. STEP 41. Check the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108 for open circuit. Disconnect joint connector (CAN1) C-06 and CAN box unit connector C-108, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 7) and CAN box unit connector C-108 (terminal 8) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 20) and CAN box unit connector C-108 (terminal 9) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108 in good condition? YES < vehicles without satellite radio >: Go to Step 43 . YES < vehicles with satellite radio >: Go to Step 42. NO: Go to Step 51 .
42. STEP 42. Check the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17 for open circuit. Disconnect joint connector (CAN1) C-06 and satellite radio tuner connector C-17, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 2) and satellite radio tuner connector C-17 (terminal 4) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 13) and satellite radio tuner connector C-17 (terminal 11) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17 in good condition? YES: Go to Step 43. NO: Go to Step 52 .
43. STEP 43. Check the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301 for open circuit. Disconnect joint connector (CAN1) C-06 and ETACS-ECU connector C-301, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-06 (terminal 6) and ETACS-ECU connector C-301 (terminal 6) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-06 (terminal 19) and ETACS-ECU connector C-301 (terminal 7) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301 in good condition? YES: Go to Step 53 . NO: Repair the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301.
44. STEP 44. Using scan tool MB991958, diagnose the CAN bus line. (checking the combination meter for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect combination meter connector C-04. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04. NO: Check combination meter connector C-04, and repair if necessary. If the combination meter connector is in good condition, replace the combination meter.
45. STEP 45. Using scan tool MB991958, diagnose the CAN bus line. (checking the KOS-ECU for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect KOS-ECU connector C-31. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31. NO: Check KOS-ECU connector C-31, and repair if necessary. If the KOS-ECU connector is in good condition, replace the KOS-ECU.
46. STEP 46. Using scan tool MB991958, diagnose the CAN bus line. (checking the WCM for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect WCM connector C-09. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09. NO: Check WCM connector C-09, and repair if necessary. If the WCM connector is in good condition, replace the WCM.
47. STEP 47. Using scan tool MB991958, diagnose the CAN bus line. (checking the SRS-ECU for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect SRS-ECU connector C-122. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122. NO: Check SRS-ECU connector C-122, and repair if necessary. If the SRS-ECU connector is in good condition, replace the SRS-ECU.
48. STEP 48. Using scan tool MB991958, diagnose the CAN bus line. (checking the occupant classification-ECU for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect occupant classification-ECU connector D-35-2. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2. NO: Check occupant classification-ECU connector D-35-2, and repair if necessary. If the occupant classification-ECU connector is in good condition, replace the occupant classification-ECU.
49. STEP 49. Using scan tool MB991958, diagnose the CAN bus line. (checking the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C > for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C >. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C >. NO: Check A/C-ECU connector C-20 < vehicles with A/C > or heater control unit connector C-48 < vehicles without A/C >, and repair if necessary. If the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C > connector is in good condition, replace the A/C-ECU < vehicles with A/C > or heater control unit < vehicles without A/C >.
50. STEP 50. Using scan tool MB991958, diagnose the CAN bus line. (checking the radio and CD player or CD changer for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect radio and CD player or CD changer connector C-104. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and radio and CD player or CD changer connector C-104. NO: Check radio and CD player or CD changer connector C-104, and repair if necessary. If the radio and CD player or CD changer connector is in good condition, replace the radio and CD player or CD changer.
51. STEP 51. Using scan tool MB991958, diagnose the CAN bus line. (checking the CAN box unit for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect CAN box unit connector C-108. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108. NO: Check CAN box unit connector C-108, and repair if necessary. If the CAN box unit connector is in good condition, replace the CAN box unit.
52. STEP 52. Using scan tool MB991958, diagnose the CAN bus line. (checking the satellite radio tuner for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Disconnect satellite radio tuner connector C-17. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17. NO: Check satellite radio tuner connector C-17, and repair if necessary. If the satellite radio tuner connector is in good condition, replace the satellite radio tuner.
53. STEP 53. Using scan tool MB991958, diagnose the CAN bus line. (trouble symptom check) CAUTION: Strictly observe the specified wiring harness repair procedure. For details, refer to «SERVICE PRECAUTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__service-precautions) . CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure. OK: The display of the scan tool MB991958 is as shown in the figure. Q: Does scan tool MB991958 screen correspond to the illustration? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/hoistjack/#general-information-except-lancer-evolution__how-to-cope-with-intermittent-malfunctions) ). NO: Check the ETACS-ECU connector C-301, and repair if necessary. If the ETACS-ECU connector is in good condition, replace the ETACS-ECU.

CAN COMMUNICATION-RELATED DTC (U-CODE) TABLE

CAN COMMUNICATION-RELATED DTC (U-CODE) TABLE

See also:
• HOW TO COPE WITH INTERMITTENT MALFUNCTIONS
• DIAGNOSTIC TROUBLE CODE CHART
• MALFUNCTION OF ETACS-ECU POWER SUPPLY CIRCUIT
• DTC C121A: ABNORMALITY IN STEERING WHEEL SENSOR CALIBRATION
• DIAGNOSTIC TROUBLE CODE CHART
• INSPECTION PROCEDURE 8: ABS-ECU POWER SUPPLY CIRCUIT SYSTEM
• INSPECTION PROCEDURE 12: ASC-ECU POWER SUPPLY CIRCUIT SYSTEM
• TROUBLE SYMPTOM CHART
• INSPECTION PROCEDURE 1: SCAN TOOL CANNOT COMMUNICATE WITH ELECTRIC POWER STEERING SYSTEM < ECU POWER SUPPLY CIRCUIT SYSTEM CHECK >
• SYMPTOM CHART
• SYMPTOM CHART
• SYMPTOM CHART
• TROUBLE SYMPTOM CHART
• TROUBLE SYMPTOM CHART
• TROUBLE SYMPTOM CHART
• DIAGNOSTIC TROUBLE CODE CHART
• DIAGNOSTIC TROUBLE CODE CHART
• TROUBLE SYMPTOM CHART
• TROUBLE SYMPTOM CHART
• TROUBLE SYMPTOM CHART
• TROUBLE SYMPTOM CHART
• PRECAUTIONS ON HOW TO REPAIR THE CAN BUS LINES
• DIAGNOSTIC ITEM 28: SHORT TO POWER SUPPLY OR GROUND, OPEN CIRCUIT OR LINE-TO-LINE SHORT IN THE CAN-B BUS LINES.
• DIAGNOSTIC ITEM 1: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY ETACS-ECU.
• DIAGNOSTIC ITEM 2: MALFUNCTION OF THE ETACS-ECU.
• DIAGNOSTIC ITEM 3: ABNORMAL SHORT BETWEEN THE CAN-C BUS LINES.
• DIAGNOSTIC ITEM 6: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY STEERING WHEEL SENSOR.
• DIAGNOSTIC ITEM 7: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY AWC-ECU. < RALLIART >
• DIAGNOSTIC ITEM 8: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY ABS-ECU < VEHICLES WITHOUT ASC > OR ASC-ECU < VEHICLES WITH ASC >.
• DIAGNOSTIC ITEM 9: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY SHIFT LEVER. < RALLIART >).
• DIAGNOSTIC ITEM 10: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY TCM. < CVT >
• DIAGNOSTIC ITEM 11: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY ELECTRIC POWER STEERING-ECU. < VEHICLES WITH ELECTRIC POWER STEERING >
• DIAGNOSTIC ITEM 12: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY TRANSAXLE ASSEMBLY (TC-SST-ECU). < RALLIART >
• DIAGNOSTIC ITEM 13: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY ECM.
• DIAGNOSTIC ITEM 14: DIAGNOSE THE LINES BETWEEN THE ETACS-ECU AND JOINT CONNECTOR (CAN2).
• DIAGNOSTIC ITEM 15: DIAGNOSE THE LINES BETWEEN JOINT CONNECTOR (CAN2) AND JOINT CONNECTOR (CAN3).
• DIAGNOSTIC ITEM 16: DIAGNOSE THE LINES BETWEEN JOINT CONNECTOR (CAN3) AND JOINT CONNECTOR (CAN4). < RALLIART >
• DIAGNOSTIC ITEM 17: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY KOS-ECU. < VEHICLES WITH KOS >
• DIAGNOSTIC ITEM 18: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY WCM. < VEHICLES WITH WCM >
• DIAGNOSTIC ITEM 19: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY SRS-ECU.
• DIAGNOSTIC ITEM 20: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY A/C-ECU < VEHICLES WITH A/C > OR HEATER CONTROL UNIT < VEHICLES WITHOUT A/C >.
• DIAGNOSTIC ITEM 21: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY RADIO AND CD PLAYER. < VEHICLES WITH RADIO AND CD PLAYER >
• DIAGNOSTIC ITEM 22: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY CAN BOX UNIT < VEHICLES WITH MMCS >.
• DIAGNOSTIC ITEM 23: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY COMBINATION METER.
• DIAGNOSTIC ITEM 24: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY OCCUPANT CLASSIFICATION-ECU.
• DIAGNOSTIC ITEM 25: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY SATELLITE RADIO TUNER < VEHICLES WITH SATELLITE RADIO TUNER >.
• DIAGNOSTIC ITEM 26: SHORT TO POWER SUPPLY OR GROUND IN BOTH CAN_H AND CAN_L LINES.
• DIAGNOSTIC ITEM 27: DIAGNOSE THE ETACS-ECU, JOINT CONNECTOR (CAN1) OR LINES BETWEEN ETACS-ECU AND JOINT CONNECTOR (CAN1).
• SERVICE PRECAUTIONS