Controller Area Network (CAN) - Lancer Evolution: Diagnosis Mitsubishi Lancer X

TEST EQUIPMENT

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

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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 judgement 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. POSSIBLE TROUBLE SPOT CHART 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) and 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) and power supply system to ECU B or D are also suspected as second cause. 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. There fore, 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. POSSIBLE TROUBLE SPOT CHART 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.

CAN BUS DIAGNOSTICS TABLE

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

CAN BUS DIAGNOSTICS REFERENCE Scan tool screen (The ECUs that are not adopted are not displayed.) Comment Diagnosis detail Reference page 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 S-AWC-ECU. DIAGNOSTIC ITEM 6: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY S-AWC-ECU. CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 7 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 STEERING WHEEL SENSOR. CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 8 Diagnose when the scan tool cannot receive the data sent by shift lever. < TC-SST > DIAGNOSTIC ITEM 8: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY SHIFT LEVER. < TC-SST > CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 9 Diagnose when the scan tool cannot receive the data sent by ASC-ECU. DIAGNOSTIC ITEM 9: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY ASC-ECU. CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 10 Diagnose when the scan tool cannot receive the data sent by ECM. DIAGNOSTIC ITEM 10: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY ECM. CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 11 Diagnose when the scan tool cannot receive the data sent by TC-SST-ECU. < TC-SST > DIAGNOSTIC ITEM 11: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY TC-SST-ECU. < TC-SST > CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 12 Diagnose the lines between the ETACS-ECU and joint connector (CAN2). DIAGNOSTIC ITEM 12: DIAGNOSE THE LINES BETWEEN THE ETACS-ECU AND JOINT CONNECTOR (CAN2). CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 13 Diagnose the lines between joint connector (CAN2) and joint connector (CAN3). DIAGNOSTIC ITEM 13: DIAGNOSE THE LINES BETWEEN JOINT CONNECTOR (CAN2) AND JOINT CONNECTOR (CAN3). CAN-C: Disconnection in red displayed area is estimated. Diagnosis Item 14 Diagnose the lines between joint connector (CAN3) and joint connector (CAN 4). < TC-SST > DIAGNOSTIC ITEM 14: DIAGNOSE THE LINES BETWEEN JOINT CONNECTOR (CAN3) AND JOINT CONNECTOR (CAN4). < TC-SST > CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 15 Diagnose when the scan tool cannot receive the data sent by KOS-ECU. DIAGNOSTIC ITEM 15: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY KOS-ECU. Diagnosis Item 16 Diagnose when the scan tool cannot receive the data sent by WCM. DIAGNOSTIC ITEM 16: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY WCM. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 17 Diagnose when the scan tool cannot receive the data sent by SRS-ECU. DIAGNOSTIC ITEM 17: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY SRS-ECU. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 18 Diagnose when the scan tool cannot receive the data sent by occupant classification-ECU. DIAGNOSTIC ITEM 18: 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 19 Diagnose when the scan tool cannot receive the data sent by A/C-ECU. DIAGNOSTIC ITEM 19: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY A/C-ECU. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 20 Diagnose when the scan tool cannot receive the data sent by radio and CD player or CD changer. DIAGNOSTIC ITEM 20: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY RADIO AND CD PLAYER OR CD CHANGER. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 21 Diagnose when the scan tool cannot receive the data sent by CAN box unit. DIAGNOSTIC ITEM 21: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY CAN BOX UNIT. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 22 Diagnose when the scan tool cannot receive the data sent by satellite radio tuner. DIAGNOSTIC ITEM 22: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY SATELLITE RADIO TUNER. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 23 Diagnose when the scan tool cannot receive the data sent by hands-free module. DIAGNOSTIC ITEM 23: DIAGNOSE WHEN THE SCAN TOOL CANNOT RECEIVE THE DATA SENT BY HANDS FREE MODULE. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 24 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 COMBINATION METER. CAN-B: A failure in the red section, or a bus-off failure is present in the gateway ECU. Diagnosis Item 25 Short to power supply or ground in both CAN_H and CAN_L lines of the CAN-B bus lines. DIAGNOSTIC ITEM 25: SHORT TO POWER SUPPLY OR GROUND IN BOTH CAN_H AND CAN_L LINES OF THE CAN-B BUS LINES. CAN-B: Disconnection in red displayed area is estimated. Diagnosis Item 26 Diagnose the ETACS-ECU, joint connector (CAN1) or lines between ETACS-ECU and joint connector (CAN1). DIAGNOSTIC ITEM 26: 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 27 Short to power supply or ground, open circuit or line-to-line short in the CAN-B bus lines. DIAGNOSTIC ITEM 27: SHORT TO POWER SUPPLY OR GROUND, OPEN CIRCUIT OR LINE-TO-LINE SHORT IN THE CAN-B BUS LINES.

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CAN-RELATED CONNECTOR REFERENCE

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

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TROUBLE JUDGEMENT CONDITIONS

If a communication flag is not set for the ETACS-ECU, the ETACS-ECU 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-40 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»(ref-289394-S20451998872008063000000) . Q: Are data link connector C-40 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-40 and ETACS-ECU connector C-301 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect the scan tool and ETACS-ECU connector C-301, and check the wiring harness. Check the wiring harness between data link connector C-40 (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-40 (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-40 and ETACS-ECU connector C-301 in good condition? YES : Go to Step 3. NO : Repair the wiring harness between data link connector C-40 and ETACS-ECU connector C-301.
3. STEP 3. Check the wiring harness between data link connector C-40 and ETACS-ECU connector C-301 for a short to ground. Measure the resistance at data link connector C-40. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect the scan tool and ETACS-ECU connector C-301, and measure the resistance at the wiring harness side of data link connector C-40. 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-40 and ETACS-ECU connector C-301.
4. STEP 4. Check the wiring harness between data link connector C-40 and ETACS-ECU connector C-301 for a short to the power supply. Measure the voltage at data link connector C-40. Disconnect the scan tool and ETACS-ECU connector C-301, and measure the resistance at the wiring harness side of data link connector C-40. Turn the ignition switch to the "ON" position. Measure the voltage between data link connector terminal 6 and body ground. < CAN_H > OK: 5 volts or less Measure the voltage between data link connector terminal 14 and body ground. < CAN_L > OK: 5 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-40 and ETACS-ECU connector C-301.
5. STEP 5. Check the wiring harness between data link connector C-40 and ETACS-ECU connector C-301 for line-to-line short. Measure the resistance at data link connector C-40. Disconnect the scan tool and ETACS-ECU connector C-301, and measure the resistance at the wiring harness side of data link connector C-40. 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-40 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 MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Replace the ETACS-ECU.

DIAGNOSTIC ITEM 2: Malfunction of the ETACS-ECU

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?

YES (The DTC other than the U code is set.) : Troubleshoot the ETACS-ECU. Refer to ETACS-ECU .

YES (Only U-code DTC is set.) : Check the power supply circuit of the ETACS-ECU. Refer to ETACS-ECU .

NO (The DTC is not set.) : Check the power supply circuit of the ETACS-ECU. Refer to ETACS-ECU .

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

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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. MB992110: Power plant ECU check harness
5. MB991997: ASC Check Harness

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1. STEP 1. Check joint connector (CAN2) C-104, joint connector (CAN3) C-127 and joint connector (CAN4) A-14 < TC-SST > 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN2) C-104, joint connector (CAN3) C-127 and joint connector (CAN4) A-14 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-104 and steering wheel senor connector C-209 for line-to-line short. Measure the resistance at joint connector (CAN2) C-104. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 : Go to Step 3. NO : Go to Step 11 .
3. STEP 3. Check the wiring harness between joint connector (CAN2) C-104 and S-AWC-ECU connector C-46 for line-to-line short. Measure the resistance at joint connector (CAN2) C-104. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 5 and 16. OK: No continuity Q: Is the check result normal? YES : Go to Step 4. NO : Go to Step 12 .
4. STEP 4. Check the wiring harness between joint connector (CAN2) C-104 and ETACS-ECU connector C-301 for line-to-line short. Measure the resistance at joint connector (CAN2) C-104. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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: No continuity Q: Is the check result normal? YES : Go to Step 5. NO : Go to Step 13 .
5. STEP 5. Check the wiring harness between joint connector (CAN3) C-127 and ASC-ECU connector A-05 for line-to-line short. Measure the resistance at joint connector (CAN3) C-127. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 < M/T > : Go to Step 6. YES < TC-SST > : Go to Step 7 . NO : Go to Step 14 .
6. STEP 6. Check the wiring harness between joint connector (CAN3) C-127 and ECM connector B-10 < M/T > for line-to-line short. Measure the resistance at joint connector (CAN3) C-127. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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: No continuity Q: Is the check result normal? YES : Check intermediate connector C-131, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN2) C-104 and joint connector (CAN3) C-127. NO : Go to Step 15 .
7. STEP 7. Check the wiring harness between joint connector (CAN3) C-127 and shift lever connector C-27 for line-to-line short. Measure the resistance at joint connector (CAN3) C-127. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 16 .
8. STEP 8. Check the wiring harness between joint connector (CAN4) A-14 and ECM connector B-10 < TC-SST > for line-to-line short. Measure the resistance at joint connector (CAN4) A-14. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 9. NO : Go to Step 15 .
9. STEP 9. Check the wiring harness between joint connector (CAN4) A-14 and transaxle assembly connector B-107 for line-to-line short. Measure the resistance at joint connector (CAN4) A-14. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 10. NO : Go to Step 17 .
10. STEP 10. Check the wiring harness between joint connector (CAN3) C-127 and joint connector (CAN2) C-104 for line-to-line short. Measure the resistance at joint connector (CAN3) C-127. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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-13, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN3) C-127 and joint connector (CAN4) A-14. NO : Check intermediate connector C-131, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN2) C-104 and joint connector (CAN3) C-127.
11. STEP 11. 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»(ref-289394-S20451998872008063000000) . 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-209 and joint connector (CAN2) C-104. NO : Check steering wheel sensor connector C-209, and repair if necessary. If the steering wheel sensor connector is in good condition, replace the steering wheel sensor.
12. STEP 12. Using scan tool MB991958, diagnose the CAN bus line. (checking the S-AWC-ECU for internal short) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 S-AWC-ECU connector C-46. 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 S-AWC-ECU connector C-46 and joint connector (CAN2) C-104. NO : Check S-AWC-ECU connector C-46, and repair if necessary. If the S-AWC-ECU connector is in good condition, replace the S-AWC-ECU.
13. STEP 13. Check the wiring harness between joint connector (CAN2) C-104 and ETACS-ECU connector C-301 for line-to-line short. Measure the resistance at joint connector (CAN2) C-104. 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 18 . NO : Repair the wiring harness between ETACS-ECU connector C-301 and joint connector (CAN2) C-104.
14. STEP 14. Using scan tool MB991958, diagnose the CAN bus line. (checking the ASC-ECU for internal short) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 ASC-ECU connector A-05. 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 ASC-ECU connector A-05 and joint connector (CAN3) C-127. NO : Check ASC-ECU connector A-05, and repair if necessary. If the ASC-ECU connector is in good condition, replace the ASC-ECU.
15. STEP 15. 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»(ref-289394-S20451998872008063000000) . 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-10. 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-10 and joint connector (CAN3) C-127 < M/T >, or check intermediate connector A-13, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between ECM connector B-10 and joint connector (CAN4) A-14 < TC-SST >. NO : Check ECM connector B-10, and repair if necessary. If the ECM connector is in good condition, replace the ECM.
16. STEP 16. 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»(ref-289394-S20451998872008063000000) . 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-27. 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-27 and joint connector (CAN3) C-127. NO : Check shift lever connector C-27, and repair if necessary. If the shift lever connector is in good condition, replace the shift lever.
17. STEP 17. Using scan tool MB991958, diagnose the CAN bus line. (checking the TC-SST-ECU for internal short) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 connector B-107. 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 connector B-107 and joint connector (CAN4) A-14. NO : Check transaxle assembly connector B-107, and repair if necessary. If the transaxle assembly connector is in good condition, replace the transaxle assembly
18. STEP 18. 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 MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Check ETACS-ECU connector C-301, and repair if necessary. If the ETACS-ECU connector is in good condition, replace the ETACS-ECU.

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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. MB992110: Power plant ECU check harness
5. MB991997: ASC Check Harness

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1. STEP 1. Check the wiring harness between joint connector (CAN2) C-104 and steering wheel sensor connector C-209 for a short to ground. Measure the resistance at joint connector (CAN2) C-104. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 : Go to Step 2. NO : Go to Step 10 .
2. STEP 2. Check the wiring harness between joint connector (CAN2) C-104 and S-AWC-ECU connector C-46 for a short to ground. Measure the resistance at joint connector (CAN2) C-104. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 5 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN2) 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 3. NO : Go to Step 11 .
3. STEP 3. Check the wiring harness between joint connector (CAN2) C-104 and ETACS-ECU connector C-301 for a short to ground. Measure the resistance at joint connector (CAN2) C-104. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 4. NO : Go to Step 12 .
4. STEP 4. Check the wiring harness between joint connector (CAN3) C-127 and ASC-ECU connector A-05 for a short to ground. Measure the resistance at joint connector (CAN3) C-127. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 < M/T > : Go to Step 5. YES < TC-SST > : Go to Step 6 . NO : Go to Step 13 .
5. STEP 5. Check the wiring harness between joint connector (CAN3) C-127 and ECM connector B-10 < M/T > for a short to ground. Measure the resistance at joint connector (CAN3) C-127. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 : Check intermediate connector C-131, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN2) C-104 and joint connector (CAN3) C-127. NO : Go to Step 14 .
6. STEP 6. Check the wiring harness between joint connector (CAN3) C-127 and shift lever connector C-27 < TC-SST > for a short to ground. Measure the resistance at joint connector (CAN3) C-127. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 15 .
7. STEP 7. Check the wiring harness between joint connector (CAN4) A-14 and ECM connector B-10 < TC-SST > for a short to ground. Measure the resistance at joint connector (CAN4) A-14. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 8. NO : Go to Step 14 .
8. STEP 8. Check the wiring harness between joint connector (CAN4) A-14 and transaxle assembly connector B-107 < TC-SST > for a short to ground. Measure the resistance at joint connector (CAN4) A-14. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 9. NO : Go to Step 16 .
9. STEP 9. Check the wiring harness between joint connector (CAN3) C-127 and joint connector (CAN2) C-104 for a short to ground. Measure the resistance at joint connector (CAN3) C-127. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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-13, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN3) C-127 and joint connector (CAN4) A-14. NO : Check intermediate connector C-131, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN3) C-127 and joint connector (CAN2) C-104.
10. STEP 10. 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»(ref-289394-S20451998872008063000000) . 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-209 and joint connector (CAN2) C-104. NO : Check steering wheel sensor connector C-209, and repair if necessary. If the steering wheel sensor connector is in good condition, replace the steering wheel sensor.
11. STEP 11. Using scan tool MB991958, diagnose the CAN bus line. (checking the S-AWC-ECU for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 S-AWC-ECU connector C-46. 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 S-AWC-ECU connector C-46 and joint connector (CAN2) C-104. NO : Check S-AWC-ECU connector C-46, and repair if necessary. If the S-AWC-ECU connector is in good condition, replace the S-AWC-ECU.
12. STEP 12. Check the wiring harness between joint connector (CAN2) C-104 and ETACS-ECU connector C-301 for a short to ground. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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-104.
13. STEP 13. Using scan tool MB991958, diagnose the CAN bus line. (checking the ASC-ECU for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 ASC-ECU connector A-05. 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 ASC-ECU connector A-05 and joint connector (CAN3) C-127. NO : Check ASC-ECU connector A-05, and repair if necessary. If the ASC-ECU connector is in good condition, replace the ASC-ECU.
14. STEP 14. 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»(ref-289394-S20451998872008063000000) . 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-10. 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-10 and joint connector (CAN3) C-127 < M/T >, or check intermediate connector A-13, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between ECM connector B-10 and joint connector (CAN4) A-14 < TC-SST >. NO : Check ECM connector B-10, and repair if necessary. If the ECM connector is in good condition, replace the ECM.
15. STEP 15. 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»(ref-289394-S20451998872008063000000) . 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-27. 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-27 and joint connector (CAN3) C-127. NO : Check shift lever connector C-27, and repair if necessary. If the shift lever connector is in good condition, replace the shift lever.
16. STEP 16. Using scan tool MB991958, diagnose the CAN bus line. (checking the TC-SST-ECU for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 connector B-107. 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 connector B-107 and joint connector (CAN4) A-14. NO : Check transaxle assembly connector B-107, and repair if necessary. If the transaxle assembly connector is in good condition, replace the transaxle assembly.

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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. MB992110: Power plant ECU check harness
5. MB991997: ASC Check Harness

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Scheme 234

1. STEP 1. Check the wiring harness between joint connector (CAN2) C-104 and steering wheel sensor connector C-209 for a short to power supply. Measure the voltage at joint connector (CAN2) C-104. 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 : Go to Step 2. NO : Go to Step 10 .
2. STEP 2. Check the wiring harness between joint connector (CAN2) C-104 and S-AWC-ECU connector C-41 for a short to power supply. Measure the voltage at joint connector (CAN2) C-104. 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 5 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN2) 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 3. NO : Go to Step 11 .
3. STEP 3. Check the wiring harness between joint connector (CAN2) C-104 and ETACS-ECU connector C-301 for a short to power supply. Measure the voltage at joint connector (CAN2) C-104. 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 4. NO : Go to Step 12 .
4. STEP 4. Check the wiring harness between joint connector (CAN3) C-127 and ASC-ECU connector A-05 for a short to power supply. Measure the voltage at joint connector (CAN3) C-127. 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 < M/T > : Go to Step 5. YES < TC-SST > : Go to Step 6 . NO : Go to Step 13 .
5. STEP 5. Check the wiring harness between joint connector (CAN3) C-127 and ECM connector B-10 < M/T > for a short to power supply. Measure the voltage at joint connector (CAN3) C-127. 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 : Check intermediate connector C-131, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN2) C-104 and joint connector (CAN3) C-127. NO : Go to Step 14 .
6. STEP 6. Check the wiring harness between joint connector (CAN3) C-127 and shift lever connector C-27 for a short to power supply. Measure the voltage at joint connector (CAN3) C-127. 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 15 .
7. STEP 7. Check the wiring harness between joint connector (CAN4) A-14 and ECM connector B-10 < TC-SST > for a short to power supply. Measure the voltage at joint connector (CAN4) A-14. 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 8. NO : Go to Step 14 .
8. STEP 8. Check the wiring harness between joint connector (CAN4) A-14 and transaxle assembly connector B-107 for a short to power supply. Measure the voltage at joint connector (CAN4) A-14. 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 9. NO : Go to Step 16 .
9. STEP 9. Check the wiring harness between joint connector (CAN3) C-127 and joint connector (CAN2) C-104 for a short to ground. Measure the resistance at joint connector (CAN3) C-127. CAUTION: Disconnect the negative battery terminal. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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-13, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN3) C-127 and joint connector (CAN4) A-14. NO : Check intermediate connector C-131, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN3) C-127 and joint connector (CAN2) C-104.
10. STEP 10. 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»(ref-289394-S20451998872008063000000) . 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 ETACS-ECU connector C-301. 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-209 and joint connector (CAN2) C-104. NO : Check steering wheel sensor connector C-209, and repair if necessary. If the steering wheel sensor connector is in good condition, replace the steering wheel sensor.
11. STEP 11. Using scan tool MB991958, diagnose the CAN bus line. (checking the S-AWC-ECU for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 S-AWC-ECU connector C-46. 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 S-AWC-ECU connector C-46 and joint connector (CAN2) C-104. NO : Check S-AWC-ECU connector C-46, and repair if necessary. If the S-AWC-ECU connector is in good condition, replace the S-AWC-ECU.
12. STEP 12. Check the wiring harness between joint connector (CAN2) C-104 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»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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: 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 : 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-104.
13. STEP 13. Using scan tool MB991958, diagnose the CAN bus line. (checking the ASC-ECU for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 ASC-ECU connector A-05. 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 ASC-ECU connector A-05 and joint connector (CAN3) C-127. NO : Check ASC-ECU connector A-05, and repair if necessary. If the ASC-ECU connector is in good condition, replace the ASC-ECU.
14. STEP 14. 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»(ref-289394-S20451998872008063000000) . 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-10. 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-10 and joint connector (CAN3) C-127 < M/T >, or check intermediate connector A-13, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between ECM connector B-10 and joint connector (CAN4) A-14 < TC-SST >. NO : Check ECM connector B-10, and repair if necessary. If the ECM connector is in good condition, replace the ECM.
15. STEP 15. 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»(ref-289394-S20451998872008063000000) . 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-27. 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-27 and joint connector (CAN3) C-127. NO : Check shift lever connector C-27, and repair if necessary. If the shift lever connector is in good condition, replace the shift lever.
16. STEP 16. Using scan tool MB991958, diagnose the CAN bus line. (checking the TC-SST-ECU for internal short to ground) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 connector B-107. 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 connector B-107 and joint connector (CAN4) A-14. NO : Check transaxle assembly connector B-107, and repair if necessary. If the transaxle assembly connector is in good condition, replace the transaxle assembly.

DIAGNOSTIC ITEM 6: Diagnose when the scan tool cannot receive the data sent by S-AWC-ECU

Scheme 235

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

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

Required Special Tools

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

Scheme 236

Scheme 237

1. STEP 1. Check joint connector (CAN2) C-104 and S-AWC-ECU connector C-46 and intermediate 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN2) C-104 and S-AWC-ECU connector C-46 and intermediate 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 (CAN2) C-104 and S-AWC-ECU connector C-46 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN2) C-104 and S-AWC-ECU connector C-46, and check the wiring harness. Check the wiring harness between joint connector (CAN2) C-104 (terminal 5) and S-AWC-ECU connector C-46 (terminal 4) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN2) C-104 (terminal 16) and S-AWC-ECU connector C-46 (terminal 5) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN2) C-104 and S-AWC-ECU connector C-46 in good condition? YES : Check the power supply circuit of the S-AWC-ECU. Refer to «TROUBLESHOOTING»(ref-289383-S34994425662008063000000) < S-AWC >. NO : Repair the wiring harness between joint connector (CAN2) C-104 and S-AWC-ECU connector C-46.

DIAGNOSTIC ITEM 7: Diagnose when the scan tool cannot receive the data sent by steering wheel sensor

Scheme 238

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 239

Scheme 240

1. STEP 1. Check joint connector (CAN2) C-104 and steering wheel sensor connector C-209 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN2) C-104 and steering wheel sensor connector C-209 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-104 and steering wheel sensor connector C-209 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN2) C-104 and steering wheel sensor connector C-209, and check the wiring harness. Check the wiring harness between joint connector (CAN2) C-104 (terminal 7) and steering wheel sensor connector C-209 (terminal 3) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN2) C-104 (terminal 20) and steering wheel sensor connector C-209 (terminal 4) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN2) C-104 and steering wheel sensor connector C-209 in good condition? YES : Check the power supply circuit of the steering wheel sensor. Refer to «TROUBLESHOOTING»(ref-289382-S17422589932008063000000) . NO : Repair the wiring harness between joint connector (CAN2) C-104 and steering wheel sensor connector C-209.

DIAGNOSTIC ITEM 8: Diagnose when the scan tool cannot receive the data sent by shift lever. < TC-SST >

Scheme 241

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 242

Scheme 243

1. STEP 1. Check joint connector (CAN3) C-127 and shift lever connector C-27 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN3) C-127 and shift lever connector C-27 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-127 and shift lever connector C-27. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN3) C-127 and shift lever connector C-27, and check the wiring harness. Check the wiring harness between joint connector (CAN3) C-127 (terminal 7) and shift lever connector C-27 (terminal 2) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN3) C-127 (terminal 20) and shift lever connector C-27 (terminal 1) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN3) C-127 and shift lever connector C-27 in good condition? YES : Check the power supply circuit of the shift lever. Refer to «TROUBLESHOOTING»(ref-289384-S12029117772008063000000) < shift lever >. NO : Repair the wiring harness between joint connector (CAN3) C-127 and shift lever connector C-27.

DIAGNOSTIC ITEM 9: Diagnose when the scan tool cannot receive the data sent by ASC-ECU

Scheme 244

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

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

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe
3. MB991997: ASC Check Harness

Scheme 245

Scheme 246

1. STEP 1. Check joint connector (CAN3) C-127 and ASC-ECU connector A-05 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN3) C-127 and ASC-ECU connector A-05 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-127 and ASC-ECU connector A-05 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN3) C-127 and ASC-ECU connector A-05, and check the wiring harness. Check the wiring harness between joint connector (CAN3) C-127 (terminal 6) and ASC-ECU connector A-05 (terminal 12) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN3) C-127 (terminal 19) and ASC-ECU connector A-05 (terminal 13) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN3) C-127 and ASC-ECU connector A-05 in good condition? YES : Check the power supply circuit of the ASC-ECU. Refer to «TROUBLESHOOTING»(ref-289382-S40893834552008063000000) . NO : Repair the wiring harness between joint connector (CAN3) C-127 and ASC-ECU connector A-05.

DIAGNOSTIC ITEM 10: Diagnose when the scan tool cannot receive the data sent by ECM

Scheme 247

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) < M/T >, joint connector (CAN4) < TC-SST >, ECM connector or intermediate connector < TC-SST > improperly connected]
2. Malfunction of the wiring harness [open circuit between the ECM connector and the joint connector (CAN3) < M/T > or the joint connector (CAN4) < TC-SST >, power supply circuit to the ECM]
3. Malfunction of the ECM

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe
3. MB992110: Power plant ECU check harness

Scheme 248

Scheme 249

Scheme 250

Scheme 251

1. STEP 1. Check joint connector (CAN3) C-127 < M/T >, joint connector (CAN4) A-14 < TC-SST >, ECM connector B-10 and intermediate connector A-13 < TC-SST > 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN3) C-127 < M/T >, joint connector (CAN4) A-14 < M/T >, ECM connector B-10 and intermediate connector A-13 < TC-SST > 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-127 < M/T > or joint connector (CAN4) A-14 < TC-SST > and ECM connector B-10. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN3) C-127 and ECM connector B-10, and check the wiring harness. Check the wiring harness between joint connector (CAN3) C-127 (terminal 4) and ECM connector B-10 (terminal 90) < M/T > OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN3) C-127 (terminal 15) and ECM connector B-10 (terminal 91) < M/T > OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN4) A-14 (terminal 7) and ECM connector B-10 (terminal 90) < TC-SST > OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN4) A-14 (terminal 20) and ECM connector B-10 (terminal 91) < TC-SST > OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN3) C-127 < M/T > or joint connector (CAN4) A-14 < TC-SST > and ECM connector B-10 in good condition? YES : Check the power supply circuit of the ECM. Refer to «MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS»(ref-289380-S04406328372008063000000) . NO : Repair the wiring harness between joint connector (CAN3) C-127 < M/T > or joint connector (CAN4) A-14 < TC-SST > and ECM connector B-10.

DIAGNOSTIC ITEM 11: Diagnose when the scan tool cannot receive the data sent by TC-SST-ECU. < TC-SST >

Scheme 252

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

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

Required Special Tools

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

Scheme 253

Scheme 254

1. STEP 1. Check joint connector (CAN4) A-14 and transaxle assembly connector B-107 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN4) A-14 and transaxle assembly connector B-107 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-14 and transaxle assembly connector B-107 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN4) A-14 and transaxle assembly B-107, and check the wiring harness. Check the wiring harness between joint connector (CAN4) A-14 (terminal 6) and transaxle assembly connector B-107 (terminal 5) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN4) A-14 (terminal 19) and transaxle assembly connector B-107 (terminal 2) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN4) A-14 and transaxle assembly connector B-107 in good condition? YES : Check the power supply circuit of the transaxle assembly. Refer to «DIAGNOSIS»(ref-289384-S17245571162008063000000) . NO : Repair the wiring harness between joint connector (CAN4) A-14 and transaxle assembly connector B-107.

DIAGNOSTIC ITEM 12: Diagnose the lines between the ETACS-ECU and joint connector (CAN2)

Scheme 255

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 256

Scheme 257

1. STEP 1. Check joint connector (CAN2) C-104 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN2) C-104 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-104 and ETACS-ECU connector C-301 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN2) C-104 and ETACS-ECU connector C-301, and check the wiring harness. Check the wiring harness between joint connector (CAN2) C-104 (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-104 (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 MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Replace the ETACS-ECU.

DIAGNOSTIC ITEM 13: Diagnose the lines between joint connector (CAN2) and joint connector (CAN3)

Scheme 258

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 259

Scheme 260

1. STEP 1. Check joint connector (CAN2) C-104, joint connector (CAN3) C-127 and intermediate connector C-131 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN2) C-104, joint connector (CAN3) C-127 and intermediate connector C-131 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-104 and joint connector (CAN3) C-127 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN2) C-104 and joint connector (CAN3) C-127, and check the wiring harness. Check the wiring harness between joint connector (CAN2) C-104 (terminal 4) and joint connector (CAN3) C-127 (terminal 5) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN2) C-104 (terminal 15) and joint connector (CAN3) C-127 (terminal 16) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN2) C-104 and joint connector (CAN3) C-127 in good condition? YES : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Repair the wiring harness between joint connector (CAN2) C-104 and joint connector (CAN3) C-127.

DIAGNOSTIC ITEM 14: Diagnose the lines between joint connector (CAN3) and joint connector (CAN4). < TC-SST >

Scheme 261

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 262

Scheme 263

1. STEP 1. Check joint connector (CAN3) C-127, joint connector (CAN4) A-14 and intermediate connector A-13 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN3) C-127, joint connector (CAN4) A-14 and intermediate connector A-13 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-127 and joint connector (CAN4) A-14 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN3) C-127 and joint connector (CAN4) A-14, and check the wiring harness. Check the wiring harness between joint connector (CAN3) C-127 (terminal 3) and joint connector (CAN4) A-14 (terminal 5) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN3) C-127 (terminal 14) and joint connector (CAN4) A-14 (terminal 16) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN3) C-127 and joint connector (CAN4) A-14 in good condition? YES : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Repair the wiring harness between joint connector (CAN3) C-127 and joint connector (CAN4) A-14.

DIAGNOSTIC ITEM 15: Diagnose when the scan tool cannot receive the data sent by KOS-ECU

Scheme 264

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 265

Scheme 266

1. STEP 1. Check joint connector (CAN1) C-105 and KOS-ECU connector C-05 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN1) C-105 and KOS-ECU connector C-05 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-105 and KOS-ECU connector C-05 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and KOS-ECU connector C-05, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 9) and KOS-ECU connector C-05 (terminal 1) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 22) and KOS-ECU connector C-05 (terminal 2) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and KOS-ECU connector C-05 in good condition? YES : Check the power supply circuit of the KOS-ECU. Refer to «DIAGNOSIS»(ref-289389-S06122817742008063000000) . NO : Repair the wiring harness between joint connector (CAN1) C-105 and KOS-ECU connector C-05.

DIAGNOSTIC ITEM 16: Diagnose when the scan tool cannot receive the data sent by WCM

Scheme 267

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 268

Scheme 269

1. STEP 1. Check joint connector (CAN1) C-105 and WCM connector C-07 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN1) C-105 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-105 and WCM connector C-07 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and WCM connector C-07, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 7) and WCM connector C-07 (terminal 11) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 20) and WCM connector C-07 (terminal 10) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07 in good condition? YES : Check the power supply circuit of the WCM. Refer to «DIAGNOSIS»(ref-289390-S37182864942008063000000) . NO : Repair the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07.

DIAGNOSTIC ITEM 17: Diagnose when the scan tool cannot receive the data sent by SRS-ECU

Scheme 270

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 271

Scheme 272

1. STEP 1. Check joint connector (CAN1) C-105 and SRS-ECU connector C-37 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN1) C-105 and SRS-ECU connector C-37 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-105 and SRS-ECU connector C-37 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and SRS-ECU connector C-37, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 8) and SRS-ECU connector C-37 (terminal 15) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 21) and SRS-ECU connector C-37 (terminal 16) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and SRS-ECU connector C-37 in good condition? YES : Check the power supply circuit of the SRS-ECU. Refer to «TROUBLESHOOTING»(ref-289381-S33362726442008063000000) . NO : Repair the wiring harness between joint connector (CAN1) C-105 and SRS-ECU connector C-37.

DIAGNOSTIC ITEM 18: Diagnose when the scan tool cannot receive the data sent by occupant classification-ECU

Scheme 273

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 274

Scheme 275

1. STEP 1. Check joint connector (CAN1) C-105, occupant classification-ECU connector D-39, D-39-2 and intermediate 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN1) C-105, occupant classification-ECU connector D-39, D-39-2 and intermediate 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 (CAN1) C-105 and occupant classification-ECU connector D-39-2 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 11) and occupant classification-ECU connector D-39-2 (terminal 24) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 24) and occupant classification-ECU connector D-39-2 (terminal 25) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2 in good condition? YES : Check the power supply circuit of the occupant classification-ECU. Refer to «SRS AIR BAG DIAGNOSIS»(ref-289381-S33362726442008063000000) . NO : Repair the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2.

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

Scheme 276

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

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

Required Special Tools

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

Scheme 277

Scheme 278

1. STEP 1. Check joint connector (CAN1) C-105 and A/C-ECU connector C-22 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN1) C-105 and A/C-ECU connector C-22 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-105 and A/C-ECU connector C-22 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and A/C-ECU connector C-22, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 1) and A/C-ECU connector C-22 (terminal 11) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 12) and A/C-ECU connector C-22 (terminal 12) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and A/C-ECU connector C-22 in good condition? YES : Check the power supply circuit of the A/C-ECU. Refer to «DIAGNOSIS»(ref-289396-S09583364592008063000000) . NO : Repair the wiring harness between joint connector (CAN1) C-105 and A/C-ECU connector C-22.

DIAGNOSTIC ITEM 20: Diagnose when the scan tool cannot receive the data sent by radio and CD player or CD changer

Scheme 279

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

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

Required Special Tools

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

Scheme 280

Scheme 281

1. STEP 1. Check joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107 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-105 and radio and CD player or CD changer connector C-107 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 5) and radio and CD player or CD changer connector C-107 (terminal 23) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 16) and radio and CD player or CD changer connector C-107 (terminal 33) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107 in good condition? YES : Check the power supply circuit of the radio and CD player or CD changer. Refer to «DIAGNOSIS < RADIO AND CD PLAYER >»(ref-289392-S09325366442008063000000) . NO : Repair the wiring harness between joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107.

DIAGNOSTIC ITEM 21: Diagnose when the scan tool cannot receive the data sent by CAN box unit

Scheme 282

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 283

Scheme 284

1. STEP 1. Check joint connector (CAN1) C-105, CAN box unit connector C-15 and intermediate connector C-108 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN1) C-105, CAN box unit connector C-15 and intermediate connector C-108 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-105 and CAN box unit connector C-15 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and CAN box unit connector C-15, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 5) and CAN box unit connector C-15 (terminal 8) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 16) and CAN box unit connector C-15 (terminal 9) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15 in good condition? YES : Check the power supply circuit of the CAN box unit. Refer to «DIAGNOSIS < MMCS >»(ref-289392-S39228403862008063000000) . NO : Repair the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15.

DIAGNOSTIC ITEM 22: Diagnose when the scan tool cannot receive the data sent by satellite radio tuner

Scheme 285

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 286

Scheme 287

1. STEP 1. Check joint connector (CAN1) C-105 and satellite radio tuner connector C-18 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN1) C-105 and satellite radio tuner connector C-18 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-105 and satellite radio tuner connector C-18 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and satellite radio tuner connector C-18, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 2) and satellite radio tuner connector C-18 (terminal 4) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 13) and satellite radio tuner connector C-18 (terminal 11) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and satellite radio tuner connector C-18 in good condition? YES : Check the power supply circuit of the satellite radio tuner. Refer to «DIAGNOSIS < SATELLITE RADIO TUNER >»(ref-289392-S35994707552008063000000) . NO : Repair the wiring harness between joint connector (CAN1) C-105 and satellite radio tuner connector C-18.

DIAGNOSTIC ITEM 23: Diagnose when the scan tool cannot receive the data sent by hands free module

Scheme 288

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

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

Required Special Tools

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

Scheme 289

Scheme 290

1. STEP 1. Check joint connector (CAN1) C-105 and hands free module connector C-11 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN1) C-105 and hands free module connector C-11 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-105 and hands free module connector C-11 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and hands free module connector C-11, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 10) and hands free module connector C-11 (terminal 4) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 23) and hands free module connector C-11 (terminal 16) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and hands free module connector C-11 in good condition? YES : Check the power supply circuit of the hands free module. Refer to «DIAGNOSIS < HANDS-FREE CELLULAR PHONE SYSTEM >»(ref-289392-S13311124022008063000000) . NO : Repair the wiring harness between joint connector (CAN1) C-105 and hands free module connector C-11.

DIAGNOSTIC ITEM 24: Diagnose when the scan tool cannot receive the data sent by combination meter

Scheme 291

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 292

Scheme 293

1. STEP 1. Check joint connector (CAN1) C-105 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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN1) C-105 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-105 and combination meter connector C-04. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and combination meter connector C-04, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 3) and combination meter connector C-04 (terminal 14) Check the wiring harness between joint connector (CAN1) C-105 (terminal 14) and combination meter connector C-04 (terminal 15) Q: Is the wiring harness between joint connector (CAN1) C-105 and combination meter connector C-04 in good condition? YES : Check the power supply circuit of the combination meter. Refer to «DIAGNOSIS»(ref-289392-S39933616702008063000000) . NO : Repair the wiring harness between joint connector (CAN1) C-105 and combination meter connector C-04.

DIAGNOSTIC ITEM 25: Short to power supply or ground in both CAN_H and CAN_L lines of the CAN-B bus lines

Scheme 294

Scheme 295

Scheme 296

Scheme 297

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

Scheme 298

Scheme 299

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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»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 13 .
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-105 and combination meter connector C-04 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 with KOS or WCM) : Go to Step 24 .
3. STEP 3. Check the wiring harness between joint connector (CAN1) C-105 and KOS-ECU connector C-05 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 25 .
4. STEP 4. Check the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 : Go to Step 5. NO : Go to Step 26 .
5. STEP 5. Check the wiring harness between joint connector (CAN1) C-105 and SRS-ECU connector C-37 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 27 .
6. STEP 6. Check the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 (vehicles without hands free system) : Go to Step 8 . YES (vehicles with hands free system) : Go to Step 7. NO : Go to Step 28 .
7. STEP 7. Check the wiring harness between joint connector (CAN1) C-105 and hands free module connector C-11 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 10 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 23 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 29 .
8. STEP 8. Check the wiring harness between joint connector (CAN1) C-105 and A/C-ECU connector C-22 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 9. YES (vehicles with MMCS) : Go to Step 10 . NO : Go to Step 30 .
9. STEP 9. Check the wiring harness between joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 < vehicles without satellite radio > : Go to Step 12 . YES < vehicles with satellite radio > : Go to Step 11 . NO : Go to Step 31 .
10. STEP 10. Check the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 (vehicles without satellite radio) : Go to Step 12 . YES (vehicles with satellite radio) : Go to Step 11. NO : Go to Step 32 .
11. STEP 11. Check the wiring harness between joint connector (CAN1) C-105 and satellite radio tuner connector C-18 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 12. NO : Go to Step 33 .
12. STEP 12. Check the wiring harness between joint connector (CAN1) C-105 and ETACS-ECU connector C-301 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 34 . NO : Repair the wiring harness between joint connector (CAN1) C-105 and ETACS-ECU connector C-301.
13. STEP 13. Check the wiring harness between joint connector (CAN1) C-105 and combination meter connector C-04 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 14. YES (vehicles with WCM) : Go to Step 15 . NO (vehicles with KOS and WCM) : Go to Step 24 .
14. STEP 14. Check the wiring harness between joint connector (CAN1) C-105 and KOS-ECU connector C-05 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 25 .
15. STEP 15. Check the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 : Go to Step 16. NO : Go to Step 26 .
16. STEP 16. Check the wiring harness between joint connector (CAN1) C-105 and SRS-ECU connector C-37 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 27 .
17. STEP 17. Check the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 (vehicles without hands free system) : Go to Step 19 . YES (vehicles with hands free system) : Go to Step 18. NO : Go to Step 28 .
18. STEP 18. Check the wiring harness between joint connector (CAN1) C-105 and hands free module connector C-11 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 10 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 23 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES : Go to Step 19. NO : Go to Step 29 .
19. STEP 19. Check the wiring harness between joint connector (CAN1) C-105 and A/C-ECU connector C-22 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 20. YES (vehicles with MMCS) : Go to Step 21 . NO : Go to Step 30 .
20. STEP 20. Check the wiring harness between joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 (vehicles without satellite radio) : Go to Step 23 . YES (vehicles with satellite radio) : Go to Step 22 . NO : Go to Step 31 .
21. STEP 21. Check the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 (vehicles without satellite radio) : Go to Step 23 . YES (vehicles with satellite radio) : Go to Step 22. NO : Go to Step 32 .
22. STEP 22. Check the wiring harness between joint connector (CAN1) C-105 and satellite radio tuner connector C-18 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 23. NO : Go to Step 33 .
23. STEP 23. Check the wiring harness between joint connector (CAN1) C-105 and ETACS-ECU connector C-301 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) and ETACS-ECU connector C-301, 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 34 . NO : Repair the wiring harness between joint connector (CAN1) C-105 and ETACS-ECU connector C-301.
24. STEP 24. 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»(ref-289394-S20451998872008063000000) . 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-105 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.
25. STEP 25. 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»(ref-289394-S20451998872008063000000) . 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-05. 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-105 and KOS-ECU connector C-05. NO : Check KOS-ECU connector C-05, and repair if necessary. If the KOS-ECU connector is in good condition, replace the KOS-ECU.
26. STEP 26. 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»(ref-289394-S20451998872008063000000) . 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-07. 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-105 and WCM connector C-07. NO : Check WCM connector C-07, and repair if necessary. If the WCM connector is in good condition, replace the WCM.
27. STEP 27. 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»(ref-289394-S20451998872008063000000) . 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-37. 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-105 and SRS-ECU connector C-37. NO : Check SRS-ECU connector C-37, and repair if necessary. If the SRS-ECU connector is in good condition, replace the SRS-ECU.
28. STEP 28. 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»(ref-289394-S20451998872008063000000) . 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-39-2. 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-105 and occupant classification-ECU connector D-39-2. NO : Check occupant classification-ECU connector D-39-2, and repair if necessary. If the occupant classification-ECU connector is in good condition, replace the occupant classification-ECU.
29. STEP 29. Using scan tool MB991958, diagnose the CAN bus line. (checking the hands free module for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 hands free module connector C-11. 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-105 and hands free module connector C-11. NO : Check hands free module connector C-11, and repair if necessary. If the hands free module connector is in good condition, replace the hands free module.
30. STEP 30. Using scan tool MB991958, diagnose the CAN bus line. (checking the A/C-ECU for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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-22. 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-105 and A/C-ECU connector C-22. NO : Check A/C-ECU connector C-22, and repair if necessary. If the A/C-ECU connector is in good condition, replace the A/C-ECU.
31. STEP 31. 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»(ref-289394-S20451998872008063000000) . 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-107. 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-105 and radio and CD player or CD changer connector C-107. NO : Check radio and CD player or CD changer connector C-107, 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.
32. STEP 32. 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»(ref-289394-S20451998872008063000000) . 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-15. 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-105 and CAN box unit connector C-15. NO : Check CAN box unit connector C-15, and repair if necessary. If the CAN box unit connector is in good condition, replace the CAN box unit.
33. STEP 33. 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»(ref-289394-S20451998872008063000000) . 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-18. 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-105 and satellite radio tuner connector C-18. NO : Check satellite radio tuner connector C-18, and repair if necessary. If the satellite radio tuner connector is in good condition, replace the satellite radio tuner.
34. STEP 34. 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»(ref-289394-S20451998872008063000000) . 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 MALFUNCTION»(ref-289379-S36733983872008063000000) ). 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 26: Diagnose the ETACS-ECU, joint connector (CAN1) or lines between ETACS-ECU and joint connector (CAN1)

Scheme 342

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 343

Scheme 344

1. STEP 1. Check joint connector (CAN1) C-105 and EATCS-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»(ref-289394-S20451998872008063000000) . Q: Are joint connector (CAN1) C-105 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-105 and ETACS-ECU connector C-301. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and ETACS-ECU connector C-301, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (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-105 (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-105 and ETACS-ECU connector C-301 in good condition? YES : Go to Step 3. NO : Repair the wiring harness between joint connector (CAN1) C-105 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»(ref-289394-S20451998872008063000000) . 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 MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Replace the ETACS-ECU.

DIAGNOSTIC ITEM 27: Short to power supply or ground, open circuit or line-to-line short in the CAN-B bus lines

Scheme 345

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

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Scheme 367

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»(ref-289394-S20451998872008063000000) . CAUTION: A digital multimeter should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . CAUTION: The test wiring harness should be used. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 13 .
2. STEP 2. Check the wiring harness between joint connector (CAN1) C-105 and combination meter connector C-04 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 with KOS or WCM) : Go to Step 48 .
3. STEP 3. Check the wiring harness between joint connector (CAN1) C-105 and KOS-ECU connector C-05 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 49 .
4. STEP 4. Check the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 : Go to Step 5. NO : Go to Step 50 .
5. STEP 5. Check the wiring harness between joint connector (CAN1) C-105 and SRS-ECU connector C-37 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 51 .
6. STEP 6. Check the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 (vehicles without hands free system) : Go to Step 8 . YES (vehicles with hands free system) : Go to Step 7. NO : Go to Step 52 .
7. STEP 7. Check the wiring harness between joint connector (CAN1) C-105 and hands free module connector C-11 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 10 and body ground. OK: 1 kilo ohm or more Measure the resistance between joint connector (CAN1) terminal 23 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 53 .
8. STEP 8. Check the wiring harness between joint connector (CAN1) C-105 and A/C-ECU connector C-22 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 9. YES (vehicles with MMCS) : Go to Step 10 . NO : Go to Step 54 .
9. STEP 9. Check the wiring harness between joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 (vehicles without satellite radio) : Go to Step 12 . YES (vehicles with satellite radio) : Go to Step 11 . NO : Go to Step 55 .
10. STEP 10. Check the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 (vehicles without satellite radio) : Go to Step 12 . YES (vehicles with satellite radio) : Go to Step 11. NO : Go to Step 56 .
11. STEP 11. Check the wiring harness between joint connector (CAN1) C-105 and satellite radio tuner connector C-18 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 12. NO : Go to Step 57 .
12. STEP 12. Check the wiring harness between joint connector (CAN1) C-105 and ETACS-ECU connector C-301 for a short to ground. Measure the resistance at joint connector (CAN1) C-105. 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 58 . NO : Repair the wiring harness between joint connector (CAN1) C-105 and ETACS-ECU connector C-301.
13. STEP 13. 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 25 . NO : Go to Step 14.
14. STEP 14. Check the wiring harness between joint connector (CAN1) C-105 and combination meter connector C-04 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. 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 15. YES (vehicles with WCM) : Go to Step 16 . NO (vehicles with KOS and WCM) : Go to Step 48 .
15. STEP 15. Check the wiring harness between joint connector (CAN1) C-105 and KOS-ECU connector C-05 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. 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 17 . NO : Go to Step 49 .
16. STEP 16. Check the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. 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 : Go to Step 17. NO : Go to Step 50 .
17. STEP 17. Check the wiring harness between joint connector (CAN1) C-105 and SRS-ECU connector C-37 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. 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 18. NO : Go to Step 51 .
18. STEP 18. Check the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. 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 (vehicles without hands free system) : Go to Step 20 . YES (vehicles with hands free system) : Go to Step 19. NO : Go to Step 52 .
19. STEP 19. Check the wiring harness between joint connector (CAN1) C-105 and hands free module connector C-11 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. 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 10 and body ground. OK: 4.7 volts or less Measure the voltage between joint connector (CAN1) terminal 23 and body ground. OK: 4.7 volts or less Q: Do all the voltages measure 4.7 volts or less? YES : Go to Step 20. NO : Go to Step 53 .
20. STEP 20. Check the wiring harness between joint connector (CAN1) C-105 and A/C-ECU connector C-22 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. 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 21. YES (vehicles with MMCS) : Go to Step 22 . NO : Go to Step 54 .
21. STEP 21. Check the wiring harness between joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. 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 (vehicles without satellite radio) : Go to Step 24 . YES (vehicles with satellite radio) : Go to Step 23 . NO : Go to Step 55 .
22. STEP 22. Check the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. 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 (vehicles without satellite radio) : Go to Step 24 . YES (vehicles with satellite radio) : Go to Step 23. NO : Go to Step 56 .
23. STEP 23. Check the wiring harness between joint connector (CAN1) C-105 and satellite radio tuner connector C-18 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. 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 24. NO : Go to Step 57 .
24. STEP 24. Check the wiring harness between joint connector (CAN1) C-105 and ETACS-ECU connector C-301 for a short to power supply. Measure the voltage at joint connector (CAN1) C-105. Disconnect joint connector (CAN1) and ETACS-ECU connector C-301, 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 58 . NO : Repair the wiring harness between joint connector (CAN1) C-105 and ETACS-ECU connector C-301.
25. STEP 25. 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»(ref-289394-S20451998872008063000000) . 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 37 . NO : Go to Step 26.
26. STEP 26. Check the wiring harness between joint connector (CAN1) C-105 and combination meter connector C-04 for line-to-line short. Measure the resistance at joint connector (CAN1) C-105. 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 27. YES (vehicles with WCM) : Go to Step 28 . NO (vehicles with KOS or WCM) : Go to Step 48 .
27. STEP 27. Check the wiring harness between joint connector (CAN1) C-105 and KOS-ECU connector C-05 for line-to-line short. Measure the resistance at joint connector (CAN1) C-105. 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 29 . NO : Go to Step 49 .
28. STEP 28. Check the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07 for line-to-line short. Measure the resistance at joint connector (CAN1) C-105. 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 : Go to Step 29. NO : Go to Step 50 .
29. STEP 29. Check the wiring harness between joint connector (CAN1) C-105 and SRS-ECU connector C-37 for line-to-line short. Measure the resistance at joint connector (CAN1) C-105. 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 30. NO : Go to Step 51 .
30. STEP 30. Check the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2 for line-to-line short. Measure the resistance at joint connector (CAN1) C-105. 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 (vehicles without hands free system) : Go to Step 32 . YES (vehicles with hands free system) : Go to Step 31. NO : Go to Step 52 .
31. STEP 31. Check the wiring harness between joint connector (CAN1) C-105 and hands free module connector C-11 for line-to-line short. Measure the resistance at joint connector (CAN1) C-105. 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 10 and 23. OK: No continuity Q: Is the check result normal? YES : Go to Step 32. NO : Go to Step 53 .
32. STEP 32. Check the wiring harness between joint connector (CAN1) C-105 and A/C-ECU connector C-22 for line-to-line short. Measure the resistance at joint connector (CAN1) C-105. 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 33. YES (vehicles with MMCS) : Go to Step 34 . NO : Go to Step 54 .
33. STEP 33. Check the wiring harness between joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107 for line-to-line short. Measure the resistance at joint connector (CAN1) C-105. 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 (vehicles without satellite radio) : Go to Step 36 . YES (vehicles with satellite radio) : Go to Step 35 . NO : Go to Step 55 .
34. STEP 34. Check the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15 for line-to-line short. Measure the resistance at joint connector (CAN1) C-105. 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 (vehicles without satellite radio) : Go to Step 36 . YES (vehicles with satellite radio) : Go to Step 35. NO : Go to Step 56 .
35. STEP 35. Check the wiring harness between joint connector (CAN1) C-105 and satellite radio tuner connector C-18 for line-to-line short. Measure the resistance at joint connector (CAN1) C-105. 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 36. NO : Go to Step 57 .
36. STEP 36. Check the wiring harness between joint connector (CAN1) C-105 and EATCS-ECU connector C-301 for line-to-line short. Measure the resistance at joint connector (CAN1) C-105. 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 58 . NO : Repair the wiring harness between joint connector (CAN1) C-105 and ETACS-ECU connector C-301.
37. STEP 37. Check the wiring harness between joint connector (CAN1) C-105 and combination meter connector C-04 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . Disconnect joint connector (CAN1) C-105 and combination meter connector C-301, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (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-105 (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-105 and combination meter connector C-04 in good condition? YES (vehicles with KOS) : Go to Step 38. YES (vehicles with WCM) : Go to Step 39 . NO ((vehicles with KOS or WCM) : Go to Step 48 .
38. STEP 38. Check the wiring harness between joint connector (CAN1) C-105 and KOS-ECU connector C-05 for open circuit. Disconnect joint connector (CAN1) C-105 and KOS-ECU connector C-05, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 9) and KOS-ECU connector C-05 (terminal 1) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 22) and KOS-ECU connector C-05 (terminal 2) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and KOS-ECU connector C-05 in good condition? YES : Go to Step 40 . NO : Go to Step 49 .
39. STEP 39. Check the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07 for open circuit. Disconnect joint connector (CAN1) C-105 and WCM connector C-07, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 7) and WCM connector C-07 (terminal 11) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 20) and WCM connector C-07 (terminal 10) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and WCM connector C-07 in good condition? YES : Go to Step 40. NO : Go to Step 50 .
40. STEP 40. Check the wiring harness between joint connector (CAN1) C-105 and SRS-ECU connector C-37 for open circuit. Disconnect joint connector (CAN1) C-105 and SRS-ECU connector C-37, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 8) and SRS-ECU connector C-37 (terminal 15) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 21) and SRS-ECU connector C-37 (terminal 16) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and SRS-ECU connector C-37 in good condition? YES : Go to Step 41. NO : Go to Step 51 .
41. STEP 41. Check the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2 for open circuit. Disconnect joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 11) and occupant classification-ECU connector D-39-2 (terminal 24) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 24) and occupant classification-ECU connector D-39-2 (terminal 25) OK: Continuity exists (2 ohms or less) NOTE: Prior to the wiring harness inspection, check intermediate connector C-41 and front seat assembly (LH) connector D-39, and repair if necessary. Q: Is the wiring harness between joint connector (CAN1) C-105 and occupant classification-ECU connector D-39-2 in good condition? YES (vehicles without hands free system) : Go to Step 43 . YES (vehicles with hands free system) : Go to Step 42. NO : Go to Step 52 .
42. STEP 42. Check the wiring harness between joint connector (CAN1) C-105 and hands free module connector C-11 for open circuit. Disconnect joint connector (CAN1) C-105 and occupant hands free module connector C-11, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 10) and hands free module connector C-11 (terminal 4) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 23) and hands free module connector C-11 (terminal 16) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and hands free module connector C-11 in good condition? YES : Go to Step 43. NO : Go to Step 53 .
43. STEP 43. Check the wiring harness between joint connector (CAN1) C-105 and A/C-ECU connector C-22 for open circuit. Disconnect joint connector (CAN1) C-105 and A/C-ECU connector C-22, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 1) and A/C-ECU connector C-22 (terminal 11) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 12) and A/C-ECU connector C-22 (terminal 12) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and A/C-ECU connector C-22 in good condition? YES (vehicles without MMCS) : Go to Step 44. YES (vehicles with MMCS) : Go to Step 45 . NO : Go to Step 54 .
44. STEP 44. Check the wiring harness between joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107 for open circuit. Disconnect joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 5) and radio and CD player or CD changer connector C-107 (terminal 23) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 16) and radio and CD player or CD changer connector C-107 (terminal 33) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and radio and CD player or CD changer connector C-107 in good condition? YES (vehicles without satellite radio) : Go to Step 47 . YES (vehicles with satellite radio) : Go to Step 46 . NO : Go to Step 55 .
45. STEP 45. Check the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15 for open circuit. Disconnect joint connector (CAN1) C-105 and CAN box unit connector C-15, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 5) and CAN box unit connector C-15 (terminal 8) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 16) and CAN box unit connector C-15 (terminal 9) OK: Continuity exists (2 ohms or less) NOTE: Prior to the wiring harness inspection, check intermediate connector C-108, and repair if necessary. Q: Is the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15 in good condition? YES (vehicles without satellite radio) : Go to Step 47 . YES (vehicles with satellite radio) : Go to Step 46. NO : Go to Step 56 .
46. STEP 46. Check the wiring harness between joint connector (CAN1) C-105 and satellite radio tuner connector C-18 for open circuit. Disconnect joint connector (CAN1) C-105 and satellite radio tuner connector C-18, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (terminal 2) and satellite radio tuner connector C-18 (terminal 4) OK: Continuity exists (2 ohms or less) Check the wiring harness between joint connector (CAN1) C-105 (terminal 13) and satellite radio tuner connector C-18 (terminal 11) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between joint connector (CAN1) C-105 and satellite radio tuner connector C-18 in good condition? YES : Go to Step 47. NO : Go to Step 57 .
47. STEP 47. Check the wiring harness between joint connector (CAN1) C-105 and ETACS-ECU connector C-301 for open circuit. Disconnect joint connector (CAN1) C-105 and ETACS-ECU connector C-301, and check the wiring harness. Check the wiring harness between joint connector (CAN1) C-105 (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-105 (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-105 and ETACS-ECU connector C-301 in good condition? YES : Go to Step 58 . NO : Repair the wiring harness between joint connector (CAN1) C-105 and ETACS-ECU connector C-301.
48. STEP 48. 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»(ref-289394-S20451998872008063000000) . 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-105 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.
49. STEP 49. 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»(ref-289394-S20451998872008063000000) . 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-05. 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-105 and KOS-ECU connector C-05. NO : Check KOS-ECU connector C-05, and repair if necessary. If the KOS-ECU connector is in good condition, replace the KOS-ECU.
50. STEP 50. 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»(ref-289394-S20451998872008063000000) . 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-07. 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-105 and WCM connector C-07. NO : Check WCM connector C-07, and repair if necessary. If the WCM connector is in good condition, replace the WCM.
51. STEP 51. 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»(ref-289394-S20451998872008063000000) . 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-37. 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-105 and SRS-ECU connector C-37. NO : Check SRS-ECU connector C-37, and repair if necessary. If the SRS-ECU connector is in good condition, replace the SRS-ECU.
52. STEP 52. 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»(ref-289394-S20451998872008063000000) . 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-39-2. 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-105 and occupant classification-ECU connector D-39-2. NO : Check occupant classification-ECU connector D-39-2, and repair if necessary. If the occupant classification-ECU connector is in good condition, replace the occupant classification-ECU.
53. STEP 53. Using scan tool MB991958, diagnose the CAN bus line. (checking the hands free module for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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 hands free module connector C-11. 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-105 and hands free module connector C-11. NO : Check hands free module connector C-11, and repair if necessary. If the hands free module connector is in good condition, replace the hands free module.
54. STEP 54. Using scan tool MB991958, diagnose the CAN bus line. (checking the A/C-ECU for internal failure) CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to «SERVICE PRECAUTIONS»(ref-289394-S20451998872008063000000) . 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-22. 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-105 and A/C-ECU connector C-22. NO : Check A/C-ECU connector C-22, and repair if necessary. If the A/C-ECU connector is in good condition, replace the A/C-ECU.
55. STEP 55. 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»(ref-289394-S20451998872008063000000) . 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-107. 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-105 and radio and CD player or CD changer connector C-107. NO : Check radio and CD player or CD changer connector C-107, 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.
56. STEP 56. 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»(ref-289394-S20451998872008063000000) . 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-15. 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-105 and CAN box unit connector C-15. NO : Check CAN box unit connector C-15, and repair if necessary. If the CAN box unit connector is in good condition, replace the CAN box unit.
57. STEP 57. 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»(ref-289394-S20451998872008063000000) . 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-18. 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-105 and satellite radio tuner connector C-18. NO : Check satellite radio tuner connector C-18, and repair if necessary. If the satellite radio tuner connector is in good condition, replace the satellite radio tuner.
58. STEP 58. 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»(ref-289394-S20451998872008063000000) . 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 MALFUNCTION»(ref-289379-S36733983872008063000000) ). 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) CHART