Module Communications Network System: Diagnosis Ford Mustang V

Inspection and Verification

1. Verify the customer concern.
2. Visually inspect for obvious signs of electrical damage. VISUAL INSPECTION CHART Electrical Smart junction box (SJB) fuse 8 (10A) Wiring harness Connections
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle: check that the program card is correctly installed. check the connections to the vehicle. check the ignition switch position.
5. If the diagnostic tool still does not communicate with the vehicle, GO to «PINPOINT TEST J»(ref-256493-S06129045562007061500000) .
6. GO to «PINPOINT TEST PC»(ref-256493-S40584577732007061500000) .

DIAGNOSTIC TROUBLE CODE (DTC) CHART

PINPOINT TEST PC: DATA LINK DIAGNOSTICS TEST

1. PC1 DATA LINK DIAGNOSTICS TEST Key in ON position. Enter the following diagnostic mode on the scan tool: Diagnostic Tool Data Link Test. Is system passed obtained? Yes : The test passed. RETURN to the Symptom Chart for the module in question. No : If CAN circuit faults; all electronic control units no response/not equipped, GO to «PINPOINT TEST G»(ref-256493-S19971606162007061500000) . If medium speed CAN circuit faults; all electronic control units no response/not equipped, GO to «PINPOINT TEST H»(ref-256493-S11075233182007061500000) . If ISO 9141 communications network circuit fault; all electronic control units no response/not equipped, GO to «PINPOINT TEST I»(ref-256493-S15994500832007061500000) . If no response from the diagnostic tool, GO to «PINPOINT TEST J»(ref-256493-S06129045562007061500000) . If the module in question is no response/not equipped, GO to «SYMPTOM CHART»(ref-256493-S20503426662007061500000) .

Symptom Chart

SYMPTOM CHART

PINPOINT TEST A: THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

Scheme 5

Scheme 6

1. A1 CHECK THE ABS MODULE C135 FOR DAMAGE Key in OFF position. Disconnect: ABS Module C135. Inspect the ABS module C135 for damage. Is the ABS module C135 OK? Yes: GO to A2. No: REPAIR the ABS module C135 as necessary. CARRY OUT the diagnostic tool data link test.
2. A2 CHECK THE HIGH SPEED CAN CIRCUITS BETWEEN THE DLC AND THE ABS MODULE FOR AN OPEN Measure the resistance between the ABS module C135-3, circuit 1827 (WH/LG), harness side and the DLC C251-6, circuit 1827 (WH/LG), harness side. (Scheme 5): Checking High Speed CAN Circuits Between DLC And ABS Module For Open (1 Of 2) Measure the resistance between the ABS module C135-18, circuit 1828 (PK/LG), harness side and the DLC C251-14, circuit 1828 (PK/LG), harness side. (Scheme 6): Checking High Speed CAN Circuits Between DLC And ABS Module For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: GO to A3. No: REPAIR the circuit. CARRY OUT the diagnostic tool data link test.
3. A3 CHECK FOR CORRECT ABS MODULE OPERATION Disconnect all the ABS module connectors. Check for: corrosion pushed-out pins Connect all the ABS module connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new ABS module. REFER to «VEHICLE DYNAMIC SYSTEMS»(ref-256483). CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.

PINPOINT TEST B: THE AUDIO UNIT DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

Scheme 7

Scheme 8

1. B1 CHECK THE AUDIO UNIT C290A FOR DAMAGE Key in OFF position. Disconnect: Audio Unit C290a. Inspect the audio unit C290a for damage. Is the audio unit C290a OK? Yes: GO to B2. No: REPAIR the audio unit C290a as necessary. CARRY OUT the diagnostic tool data link test.
2. B2 CHECK THE MEDIUM SPEED CAN CIRCUITS BETWEEN THE DLC AND THE AUDIO UNIT FOR AN OPEN Measure the resistance between the audio unit C290a-15, circuit 1847 (WH/OG), harness side and the DLC C251-3, circuit 1847 (WH/OG), harness side. (Scheme 7): Checking Medium Speed CAN Circuits Between DLC And Audio Unit For Open (1 Of 2) Measure the resistance between the audio unit C290a-16, circuit 1848 (PK/OG), harness side and the DLC C251-11, circuit 1848 (PK/OG), harness side. (Scheme 8): Checking Medium Speed CAN Circuits Between DLC And Audio Unit For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: GO to B3. No: REPAIR the circuit. CARRY OUT the diagnostic tool data link test.
3. B3 CHECK FOR CORRECT AUDIO UNIT OPERATION Disconnect all the audio unit connectors. Check for: corrosion pushed-out pins Connect all the audio unit connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new audio unit. REFER to «ENTERTAINMENT SYSTEM - GENERAL INFORMATION»(ref-256517). CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.

PINPOINT TEST C: THE INSTRUMENT CLUSTER DOES NOT RESPOND TO THE DIAGNOSTIC TOOL - HIGH SPEED CONTROLLER AREA NETWORK (CAN)

Scheme 9

Scheme 10

1. C1 CHECK THE INSTRUMENT CLUSTER C220 FOR DAMAGE Depower the supplemental restraint system (SRS). Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). Disconnect: Instrument Cluster C220. Inspect the instrument cluster C220 for damage. Is the instrument cluster C220 OK? Yes: GO to C2. No: REPAIR the instrument cluster C220 as necessary. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. CARRY OUT the diagnostic tool data link test.
2. C2 CHECK HIGH SPEED CAN CIRCUITS BETWEEN THE DLC AND THE INSTRUMENT CLUSTER FOR AN OPEN Measure the resistance between the instrument cluster C220-18, circuit 1827 (WH/LG), harness side and the DLC C251-6, circuit 1827 (WH/LG), harness side. (Scheme 9): Checking High Speed CAN Circuits Between DLC And Instrument Cluster For Open (1 Of 2) Measure the resistance between the instrument cluster C220-17, circuit 1828 (PK/LG), harness side and the DLC C251-14, circuit 1828 (PK/LG), harness side. (Scheme 10): Checking High Speed CAN Circuits Between DLC And Instrument Cluster For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: GO to C3. No: REPAIR the circuit. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CARRY OUT the diagnostic tool data link test.
3. C3 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION Disconnect all the instrument cluster connectors. Check for: corrosion pushed-out pins Connect all the instrument cluster connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new instrument cluster. REFER to «INSTRUMENT CLUSTER»(ref-256484). REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.

PINPOINT TEST D: THE INSTRUMENT CLUSTER DOES NOT RESPOND TO THE DIAGNOSTIC TOOL - MEDIUM SPEED CONTROLLER AREA NETWORK (CAN)

Scheme 11

Scheme 12

1. D1 CHECK THE INSTRUMENT CLUSTER C220 FOR DAMAGE Depower the supplemental restraint system (SRS). Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). Disconnect: Instrument Cluster C220. Inspect the instrument cluster C220 for damage. Is the instrument cluster C220 OK? Yes: GO to D2. No: REPAIR the instrument cluster C220 as necessary. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. CARRY OUT the diagnostic tool data link test.
2. D2 CHECK THE MEDIUM SPEED CAN CIRCUITS BETWEEN THE DLC AND THE INSTRUMENT CLUSTER FOR AN OPEN Measure the resistance between the instrument cluster C220-15, circuit 1847 (WH/OG), harness side and the DLC C251-3, circuit 1847 (WH/OG), harness side. (Scheme 11): Checking Medium Speed CAN Circuits Between DLC And Instrument Cluster For Open (1 Of 2) Measure the resistance between the instrument cluster C220-14, circuit 1848 (PK/OG), harness side and the DLC C251-11, circuit 1848 (PK/OG), harness side. (Scheme 12): Checking Medium Speed CAN Circuits Between DLC And Instrument Cluster For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: GO to D3. No: REPAIR the circuit. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.
3. D3 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION Disconnect all the instrument cluster connectors. Check for: corrosion pushed-out pins Connect all the instrument cluster connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new instrument cluster. REFER to «INSTRUMENT CLUSTER»(ref-256484). REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.

PINPOINT TEST E: THE POWERTRAIN CONTROL MODULE (PCM) DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

Scheme 13

Scheme 14

1. E1 CHECK THE PCM C175B FOR DAMAGE Key in OFF position. Disconnect: PCM C175b. Inspect the PCM C175b for damage. Is the PCM C175b OK? Yes: GO to E2. No: REPAIR the PCM C175b as necessary. CARRY OUT the diagnostic tool data link test.
2. E2 CHECK THE HIGH SPEED CAN CIRCUITS BETWEEN THE DLC AND THE PCM FOR AN OPEN Measure the resistance between the PCM C175b-11, circuit 1827 (WH/LG), harness side and the DLC C251-6, circuit 1827 (WH/LG), harness side. (Scheme 13): Checking High Speed CAN Circuits Between DLC And PCM For Open (1 Of 2) Measure the resistance between the PCM C175b-23, circuit 1828 (PK/LG), harness side and the DLC C251-14, circuit 1828 (PK/LG), harness side. (Scheme 14): Checking High Speed CAN Circuits Between DLC And PCM For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: GO to E3. No: REPAIR the circuit. CARRY OUT the diagnostic tool data link test.
3. E3 CHECK FOR CORRECT PCM OPERATION Disconnect all the PCM connectors. Check for: corrosion pushed-out pins Connect all the PCM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new PCM. REFER to «ELECTRONIC ENGINE CONTROLS»(ref-256463). CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.

PINPOINT TEST F: THE SMART JUNCTION BOX (SJB) DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

Scheme 15

Scheme 16

1. F1 CHECK THE SJB C2280B FOR DAMAGE Key in OFF position. Disconnect: SJB C2280b. Inspect the SJB C2280b for damage. Is the SJB C2280b OK? Yes: GO to F2. No: REPAIR the SJB C2280b as necessary. CARRY OUT the diagnostic tool data link test.
2. F2 CHECK THE MEDIUM SPEED CAN CIRCUITS BETWEEN THE DLC AND THE SJB FOR AN OPEN Measure the resistance between the SJB C2280b-50, circuit 1847 (WH/OG), harness side and the DLC C251-3, circuit 1847 (WH/OG), harness side. (Scheme 15): Checking Medium Speed CAN Circuits Between DLC And SJB For Open (1 Of 2) Measure the resistance between the SJB C2280b-51, circuit 1848 (PK/OG), harness side and the DLC C251-11, circuit 1848 (PK/OG), harness side. (Scheme 16): Checking Medium Speed CAN Circuits Between DLC And SJB For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: GO to F3. No: REPAIR the circuit. CARRY OUT the diagnostic tool data link test.
3. F3 CHECK FOR CORRECT SJB OPERATION Disconnect all the SJB connectors. Check for: corrosion pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new SJB. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-256487). CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. CARRY OUT the diagnostic tool data link test.

PINPOINT TEST G: NO HIGH SPEED CONTROLLER AREA NETWORK (CAN) COMMUNICATION

Scheme 17

Scheme 18

Scheme 19

Scheme 20

Scheme 21

Scheme 22

Scheme 23

Scheme 24

Scheme 25

Scheme 26

Scheme 27

1. G1 CHECK THE DLC C251 FOR DAMAGE Inspect the DLC C251 for damage. Is the DLC C251 OK? Yes: GO to G2. No: REPAIR the DLC C251 as necessary. CARRY OUT the diagnostic tool data link test.
2. G2 CHECK THE HIGH SPEED CAN TERMINATION RESISTANCE Key in OFF position. Measure the resistance between the DLC C251-14, circuit 1828 (PK/LG), harness side and the DLC C251-6, circuit 1827 (WH/LG), harness side. (Scheme 17): Checking High Speed CAN Termination Resistance Is the resistance between 54 and 66 ohms? Yes: GO to G5. No: GO to G3.
3. G3 CHECK THE HIGH SPEED CAN RESISTANCE WITH THE PCM C175B DISCONNECTED Disconnect: PCM C175b. Measure the resistance between the DLC C251-14, circuit 1828 (PK/LG), harness side and the DLC C251-6, circuit 1827 (WH/LG), harness side. (Scheme 18): Checking High Speed CAN Resistance With PCM C175B Disconnected Is the resistance between 108 and 132 ohms? Yes: GO to G4. No: GO to G11.
4. G4 CHECK THE HIGH SPEED CAN RESISTANCE WITH THE INSTRUMENT CLUSTER C220 DISCONNECTED Connect: PCM C175b. Depower the supplemental restraint system (SRS). Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). Disconnect: Instrument Cluster C220. Measure the resistance between the DLC C251-14, circuit 1828 (PK/LG), harness side and the DLC C251-6, circuit 1827 (WH/LG), harness side. (Scheme 19): Checking High Speed CAN Resistance With Instrument Cluster C220 Disconnected Is the resistance between 108 and 132 ohms? Yes: CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). GO to G5. No: CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). GO to G9.
5. G5 CHECK THE ABS MODULE C135 FOR DAMAGE Key in OFF position. Disconnect: ABS Module C135. Inspect the ABS module C135 for damage. Is the ABS module C135 OK? Yes: GO to G6. No: REPAIR the ABS module C135 as necessary. CARRY OUT the diagnostic tool data link test.
6. G6 CHECK THE HIGH SPEED CAN CIRCUITS BETWEEN THE DLC AND THE ABS MODULE FOR AN OPEN Measure the resistance between the ABS module C135-3, circuit 1827 (WH/LG), harness side and the DLC C251-6, circuit 1827 (WH/LG), harness side. (Scheme 20): Checking High Speed CAN Circuits Between DLC And ABS Module For Open (1 Of 2) Measure the resistance between the ABS module C135-18, circuit 1828 (PK/LG), harness side and the DLC C251-14, circuit 1828 (PK/LG), harness side. (Scheme 21): Checking High Speed CAN Circuits Between DLC And ABS Module For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: GO to G7. No: REPAIR the circuit. CARRY OUT the diagnostic tool data link test.
7. G7 CHECK THE COMMUNICATIONS NETWORK WITH THE ABS MODULE C135 DISCONNECTED Key in ON position. Enter the following diagnostic mode on the scan tool: Diagnostic Tool Data Link Test. Is system passed obtained? Yes: GO to G15. No: CONNECT the ABS module C135. GO to G8.
8. G8 CHECK THE PCM C175B FOR DAMAGE Key in OFF position. Disconnect: PCM C175b. Inspect the PCM C175b for damage. Is the PCM C175b OK? Yes: GO to G9. No: REPAIR the PCM C175b as necessary. CARRY OUT the diagnostic tool data link test.
9. G9 CHECK THE HIGH SPEED CAN CIRCUITS BETWEEN THE DLC AND THE PCM FOR AN OPEN Measure the resistance between the PCM C175b-11, circuit 1827 (WH/LG), harness side and the DLC C251-6, circuit 1827 (WH/LG), harness side. (Scheme 22): Checking High Speed CAN Circuits Between DLC And PCM For Open (1 Of 2) Measure the resistance between the PCM C175b-23, circuit 1828 (PK/LG), harness side and the DLC C251-14, circuit 1828 (PK/LG), harness side. (Scheme 23): Checking High Speed CAN Circuits Between DLC And PCM For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: If sent here from G4, GO to G17. If sent here from G8, GO to G10. No: REPAIR the circuit. CARRY OUT the diagnostic tool data link test.
10. G10 CHECK THE INSTRUMENT CLUSTER C220 FOR DAMAGE Depower the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). Disconnect: Instrument Cluster C220. Inspect the instrument cluster C220 for damage. Is the instrument cluster C220 OK? Yes: GO to G11. No: REPAIR the instrument cluster C220 as necessary. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CARRY OUT the diagnostic tool data link test.
11. G11 CHECK THE HIGH SPEED CAN CIRCUITS BETWEEN THE DLC AND THE INSTRUMENT CLUSTER FOR AN OPEN Measure the resistance between the instrument cluster C220-18, circuit 1827 (WH/LG), harness side and the DLC C251-6, circuit 1827 (WH/LG), harness side. (Scheme 24): Checking High Speed CAN Circuits Between DLC And Instrument Cluster For Open (1 Of 2) Measure the resistance between the instrument cluster C220-17, circuit 1828 (PK/LG), harness side and the DLC C251-14, circuit 1828 (PK/LG), harness side. (Scheme 25): Checking High Speed CAN Circuits Between DLC And Instrument Cluster For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: If sent here from G3, GO to G16. If sent here from G10, GO to G12. No: REPAIR the circuit. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CARRY OUT the diagnostic tool data link test.
12. G12 CHECK THE HIGH SPEED CAN CIRCUITS FOR A SHORT TO VOLTAGE Disconnect: ABS Module C135. Key in ON position. Measure the voltage between the DLC C251-6, circuit 1827 (WH/LG), harness side and ground; and between the DLC C251-14, circuit 1828 (PK/LG), harness side and ground. (Scheme 26): Checking High Speed CAN Circuits For Short To Voltage Is any voltage present? Yes: REPAIR the circuit. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the diagnostic trouble codes (DTCs). CARRY OUT the diagnostic tool data link test. No: GO to G13.
13. G13 CHECK THE HIGH SPEED CAN CIRCUITS FOR A SHORT TO GROUND Key in OFF position. Measure the resistance between the DLC C251-6, circuit 1827 (WH/LG), harness side and ground; and between the DLC C251-14, circuit 1828 (PK/LG), harness side and ground. (Scheme 27): Checking High Speed CAN Circuits For Short To Ground Are the resistances greater than 10,000 ohms? Yes: GO to G14. No: REPAIR the circuit. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the DTCs. CARRY OUT the diagnostic tool data link test.
14. G14 CHECK THE HIGH SPEED CAN WITH A SUBSTITUTED PCM Connect: ABS Module C135. Connect: Instrument Cluster C220. Install a known good PCM. Refer to «ELECTRONIC ENGINE CONTROLS»(ref-256463). Repower the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). Key in ON position. Enter the following diagnostic mode on the scan tool: Diagnostic Tool Data Link Test. Is system passed obtained? Yes: GO to G17. No: GO to G16.
15. G15 CHECK FOR CORRECT ABS MODULE OPERATION Disconnect all the ABS module connectors. Check for: corrosion pushed-out pins Connect all the ABS module connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new ABS module. REFER to «VEHICLE DYNAMIC SYSTEMS»(ref-256483). CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
16. G16 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION Disconnect all the instrument cluster connectors. Check for: corrosion pushed-out pins Connect all the instrument cluster connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new instrument cluster. REFER to «INSTRUMENT CLUSTER»(ref-256484). REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.
17. G17 CHECK FOR CORRECT PCM OPERATION Disconnect all the PCM connectors. Check for: corrosion pushed-out pins Connect all the PCM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new PCM. REFER to «ELECTRONIC ENGINE CONTROLS»(ref-256463). CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

PINPOINT TEST H: NO MEDIUM SPEED CONTROLLER ARE NETWORK (CAN) COMMUNICATION

Scheme 28

Scheme 29

Scheme 30

Scheme 31

Scheme 32

Scheme 33

Scheme 34

Scheme 35

Scheme 36

Scheme 37

Scheme 38

1. H1 CHECK THE DLC C251 FOR DAMAGE Inspect the DLC C251 for damage. Is the DLC C251 OK? Yes: GO to H2. No: REPAIR the DLC C251 as necessary. CARRY OUT the diagnostic tool data link test.
2. H2 CHECK THE MEDIUM SPEED CAN TERMINATION RESISTANCE Key in OFF position. Disconnect the battery. Refer to «BATTERY, MOUNTING AND CABLES»(ref-256496). Measure the resistance between the DLC C251-3, circuit 1847 (WH/OG), harness side and the DLC C251-11, circuit 1848 (PK/OG), harness side. (Scheme 28): Checking Medium Speed CAN Termination Resistance Is the resistance between 54 and 66 ohms? Yes: GO to H5. No: GO to H3.
3. H3 CHECK THE MEDIUM SPEED CAN RESISTANCE WITH THE INSTRUMENT CLUSTER C220 DISCONNECTED Depower the supplemental restraint system (SRS). Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). Disconnect: Instrument Cluster C220. Measure the resistance between the DLC C251-3, circuit 1847 (WH/OG), harness side and the DLC C251-11, circuit 1848 (PK/OG), harness side. (Scheme 29): Checking Medium Speed CAN Resistance With Instrument Cluster C220 Disconnected Is the resistance between 108 and 132 ohms? Yes: GO to H4. No: CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). GO to H9.
4. H4 CHECK THE MEDIUM SPEED CAN RESISTANCE WITH THE SJB C2280B DISCONNECTED Connect: Instrument Cluster C220. Disconnect: SJB C2280b. Measure the resistance between the DLC C251-3, circuit 1847 (WH/OG), harness side and the DLC C251-11, circuit 1848 (PK/OG), harness side. (Scheme 30): Checking Medium Speed CAN Resistance With SJB C2280B Disconnected Is the resistance between 108 and 132 ohms? Yes: CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). GO to H5. No: GO to H11.
5. H5 CHECK THE AUDIO UNIT C290A FOR DAMAGE Key in OFF position. Disconnect: Audio Unit C290a. Inspect the audio unit C290a for damage. Is the audio unit C290a OK? Yes: GO to H6. No: REPAIR the audio unit C290a as necessary. CARRY OUT the diagnostic tool data link test.
6. H6 CHECK THE MEDIUM SPEED CAN CIRCUITS BETWEEN THE DLC AND THE AUDIO UNIT FOR AN OPEN Measure the resistance between the audio unit C290a-15, circuit 1847 (WH/OG), harness side and the DLC C251-3, circuit 1847 (WH/OG), harness side. (Scheme 31): Checking Medium Speed CAN Circuits Between DLC And Audio Unit For Open (1 Of 2) Measure the resistance between the audio unit C290a-16, circuit 1848 (PK/OG), harness side and the DLC C251-11, circuit 1848 (PK/OG), harness side. (Scheme 32): Checking Medium Speed CAN Circuits Between DLC And Audio Unit For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: GO to H7. No: REPAIR the circuit. CARRY OUT the diagnostic tool data link test.
7. H7 CHECK THE COMMUNICATIONS NETWORK WITH THE AUDIO UNIT C290A DISCONNECTED Key in ON position. Enter the following diagnostic mode on the scan tool: Diagnostic Tool Data Link Test. Is system passed obtained? Yes: GO to H15. No: CONNECT the audio unit C290a. GO to H8.
8. H8 CHECK THE SJB C2280B FOR DAMAGE Key in OFF position. Disconnect: SJB C2280b. Inspect the SJB C2280b for damage. Is the SJB C2280b OK? Yes: GO to H9. No: REPAIR the SJB C2280b as necessary. CARRY OUT the diagnostic tool data link test.
9. H9 CHECK MEDIUM SPEED CAN CIRCUITS BETWEEN THE DLC AND THE SJB FOR AN OPEN Measure the resistance between the SJB C2280b-50, circuit 1847 (WH/OG), harness side and the DLC C251-3, circuit 1847 (WH/OG), harness side. (Scheme 33): Checking Medium Speed CAN Circuits Between DLC And SJB For Open (1 Of 2) Measure the resistance between the SJB C2280b-51, circuit 1848 (PK/OG), harness side and the DLC C251-11, circuit 1848 (PK/OG), harness side. (Scheme 34): Checking Medium Speed CAN Circuits Between DLC And SJB For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: If sent here from H3, GO to H17. If sent here from H8, GO to H10. No: REPAIR the circuit. CARRY OUT the diagnostic tool data link test.
10. H10 CHECK THE INSTRUMENT CLUSTER C220 FOR DAMAGE Depower the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). Disconnect: Instrument Cluster C220. Inspect the instrument cluster C220 for damage. Is the instrument cluster C220 OK? Yes: GO to H11. No: REPAIR the instrument cluster C220 as necessary. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CARRY OUT the diagnostic tool data link test.
11. H11 CHECK THE MEDIUM SPEED CAN CIRCUITS BETWEEN THE DLC AND THE INSTRUMENT CLUSTER FOR AN OPEN Measure the resistance between the instrument cluster C220-15, circuit 1847 (WH/OG), harness side and the DLC C251-3, circuit 1847 (WH/OG), harness side. (Scheme 35): Checking Medium Speed CAN Circuits Between DLC And Instrument Cluster For Open (1 Of 2) Measure the resistance between the instrument cluster C220-14, circuit 1848 (PK/OG), harness side and the DLC C251-11, circuit 1848 (PK/OG), harness side. (Scheme 36): Checking Medium Speed CAN Circuits Between DLC And Instrument Cluster For Open (2 Of 2) Are the resistances less than 5 ohms? Yes: If sent here from H4, GO to H16. If sent here from H10, GO to H12. No: REPAIR the circuit. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CARRY OUT the diagnostic tool data link test.
12. H12 CHECK THE MEDIUM SPEED CAN CIRCUITS FOR A SHORT TO VOLTAGE Disconnect: Audio Unit C290a. Key in ON position. Measure the voltage between the DLC C251-3, circuit 1847 (WH/OG), harness side and ground; and between the DLC C251-11, circuit 1848 (PK/OG), harness side and ground. (Scheme 37): Checking Medium Speed CAN Circuits For Short To Voltage Is any voltage present? Yes: REPAIR the circuit. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the diagnostic trouble codes (DTCs). CARRY OUT the diagnostic tool data link test. No: GO to H13.
13. H13 CHECK THE MEDIUM SPEED CAN CIRCUITS FOR A SHORT TO GROUND Key in OFF position. Measure the resistance between the DLC C251-3, circuit 1847 (WH/OG), harness side and ground; and between the DLC C251-11, circuit 1848 (PK/OG), harness side and ground. (Scheme 38): Checking Medium Speed CAN Circuits For Short To Ground Are the resistances greater than 10,000 ohms? Yes: GO to H14. No: REPAIR the circuit in question. CONNECT the instrument cluster C220. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the DTCs. CARRY OUT the diagnostic tool data link test.
14. H14 CHECK THE MEDIUM SPEED CAN WITH A SUBSTITUTED SJB Connect: Audio Unit C290a. Connect: Instrument Cluster C220. Install a known good SJB. Refer to «MULTIFUNCTION ELECTRONIC MODULES»(ref-256487). Repower the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). Key in ON position. Enter the following diagnostic mode on the scan tool: Diagnostic Tool Data Link Test. Is system passed obtained? Yes: GO to H17. No: GO to H16.
15. H15 CHECK FOR CORRECT AUDIO UNIT OPERATION Disconnect all the audio unit connectors. Check for: corrosion pushed-out pins Connect all the audio unit connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new audio unit. REFER to «ENTERTAINMENT SYSTEM - GENERAL INFORMATION»(ref-256517). CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
16. H16 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION Disconnect all the instrument cluster connectors. Check for: corrosion pushed-out pins Connect all the instrument cluster connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new instrument cluster. REFER to «INSTRUMENT CLUSTER»(ref-256484). REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.
17. H17 CHECK FOR CORRECT SJB OPERATION Disconnect all the SJB connectors. Check for: corrosion pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new SJB. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-256487). CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

PINPOINT TEST I: NO INTERNATIONAL STANDARDS ORGANIZATION (ISO) 9141 COMMUNICATIONS NETWORK COMMUNICATION

Scheme 39

Scheme 40

1. I1 CHECK THE DLC C251 FOR DAMAGE Inspect the DLC C251 for damage. Is the DLC C251 OK? Yes: GO to I2. No: REPAIR the DLC C251 as necessary. CARRY OUT the diagnostic tool data link test.
2. I2 CHECK THE RCM C2041A FOR DAMAGE Key in OFF position. Depower the supplemental restraint system (SRS). Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). Disconnect: RCM C2041a. Is the RCM C2041a OK? Yes: GO to I3. No: REPAIR the RCM C2041a as necessary. CONNECT the RCM C2041a. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CARRY OUT the diagnostic tool data link test.
3. I3 CHECK THE ISO 9141 CIRCUIT FOR A SHORT TO VOLTAGE Key in ON position. Measure the voltage between the DLC C251-7, circuit 70 (LB/WH), harness side and ground. (Scheme 39): Checking ISO 9141 Circuit For Short To Voltage Is any voltage present? Yes: GO to I4. No: REPAIR the circuit. CONNECT the RCM C2041a. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. CARRY OUT the diagnostic tool data link test.
4. I4 CHECK THE ISO 9141 CIRCUIT BETWEEN THE DLC AND THE RCM FOR AN OPEN OR A SHORT TO GROUND Key in OFF position. Measure the resistance between the RCM C2041a-11, circuit 70 (LB/WH), harness side and the DLC C251-7, circuit 70 (LB/WH), harness side; and between the RCM C2041a-11, circuit 70 (LB/WH), harness side and ground. (Scheme 40): Checking ISO 9141 Circuit Between DLC And RCM For Open Or Short To Ground Is the resistance less than 5 ohms between the RCM connector and the DLC, and greater than 10,000 ohms between the RCM connector and ground? Yes: GO to I5. No: REPAIR the circuit. CONNECT the RCM C2041a. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.
5. I5 CHECK FOR CORRECT RCM OPERATION Disconnect all the RCM connectors. Check for: corrosion pushed-out pins Connect all the RCM module connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new RCM. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-256497). CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.

PINPOINT TEST J: NO MODULE/NETWORK COMMUNICATION - NO POWER TO THE DIAGNOSTIC TOOL

Scheme 41

Scheme 42

1. J1 CHECK THE DIAGNOSTIC TOOL CONNECTOR FOR DAMAGE Inspect the diagnostic tool connector pins for damage. Are the pins OK? Yes: GO to J2. No: REPAIR the diagnostic tool connector as necessary. CARRY OUT the diagnostic tool data link test.
2. J2 CHECK THE DLC C251 FOR DAMAGE Inspect the DLC C251 pins for damage. Are the pins OK? Yes: GO to J3. No: REPAIR the DLC C251 as necessary. CARRY OUT the diagnostic tool data link test.
3. J3 CHECK CIRCUIT 1047 (LG/RD) FOR VOLTAGE Key in ON position. Measure the voltage between the DLC C251-16, circuit 1047 (LG/RD), harness side and ground. (Scheme 41): Checking Circuit 1047 (LG/RD) For Voltage Is the voltage greater than 10 volts? Yes: GO to J4. No: VERIFY the SJB fuse 8 (10A) is OK. If OK, REPAIR the circuit. CARRY OUT the diagnostic tool data link test.
4. J4 CHECK CIRCUITS 570 (BK/WH) AND 1205 (BK) FOR AN OPEN Measure the resistance between the DLC C251-4, circuit 1205 (BK), harness side and ground; and between the DLC C251-5, circuit 570 (BK/WH), harness side and ground. (Scheme 42): Checking Circuits 570 (BK/WH) And 1205 (BK) For Open Are the resistances less than 5 ohms? Yes: REPAIR the diagnostic tool. CARRY OUT the diagnostic tool data link test. No: REPAIR the circuit. CARRY OUT the diagnostic tool data link test.