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Diagnostic Procedure

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  1. Using scan tool, check for other transaxle-related DTCs. If DTCs P0888, P0890 or P0891 are also present, diagnose these DTCs first in order listed. If no other transaxle-related DTCs are present, go to next step.
  2. Using scan tool, check STARTS SINCE SET counter for DTC P0760. If counter is set at zero, go to next step. If counter is not set at zero, go to step  10.
    3. NOTE: Failure to remove starter relay can cause a NO RESPONSE FROM TCM condition.
  3. Remove starter relay from power distribution center. See Figure. This prevents vehicle from starting in gear. Install Transmission Simulator (8333). Turn ignition on. Monitor OD solenoid LED on simulator while actuating OD solenoid with scan tool. If OD solenoid LED on simulator blinks, go to next step. If LED does not blink, go to step  5.
    4. NOTE: Consult manufacturer's warranty documentation (if applicable) prior to performing repairs.
  4. If no other potential causes for DTC P0760 remain, solenoid assembly is assumed to be faulty. Repair or replace as necessary. See REMOVAL & INSTALLATION in appropriate SERVICING article in AUTOMATIC TRANSMISSIONS.
    5. NOTE: When testing circuits with a test light, ensure test light illuminates brightly. Compare test light brightness of circuits to brightness of test light when connected to direct battery voltage. If circuits do not illuminate with same brightness as direct battery voltage, circuit must be repaired.
  5. Turn ignition switch to OFF position. Disconnect solenoid assembly harness connector. Remove transmission control relay from power distribution center. See Figure. Using fused jumper wire, jumper fused B+ circuit and transmission control relay output circuit together at transmission control relay connector. See WIRING DIAGRAMS . Using test light connected to ground, probe transmission control relay output circuit at solenoid assembly harness connector terminal No. 4. See WIRING DIAGRAMS . If test light illuminates brightly, remove test light and jumper wire and go to next step. If test light does not illuminate, or does not illuminate brightly, repair circuit for open or high resistance. If fuse is open, ensure to check for short to ground.
  6. Turn ignition switch to LOCK position. Disconnect PCM harness connector C4. See Figure. Measure resistance of OD solenoid control circuit between solenoid assembly harness connector terminal No. 7 and PCM harness connector C4 terminal No. 1 using Miller Special Tool (8815). See WIRING DIAGRAMS . If resistance is greater than 5 ohms, repair open circuit. If resistance is 5 ohms or less, go to next step.
  7. Measure resistance between ground and OD solenoid control circuit at PCM harness connector C4 terminal No. 1 using Miller Special Tool (8815). If resistance is less than 5 ohms, repair circuit for short to ground. If resistance is 5 ohms or greater, go to next step.
  8. Connect fused jumper wire between fused B+ circuit and transmission control relay output circuit at transmission control relay connector. Turn ignition on. Measure voltage of OD solenoid control circuit at PCM harness connector C4 terminal No. 1 using Miller Special Tool (8815). If voltage is greater than .5 volt, repair circuit for short to voltage. If voltage is .5 volt or less, go to next step.
  9. If no other potential causes for DTC P0760 remain, PCM is assumed to be faulty. Repair or replace as necessary. See POWERTRAIN CONTROL MODULE  under REMOVAL & INSTALLATION.
  10. Conditions necessary to set DTC are not present at this time. Using wiring diagram as a guide, inspect wiring and connectors associated with circuits in question. See WIRING DIAGRAMS . Wiggle wires while checking for shorted and open circuits. Repair as necessary. If circuits are okay, testing is complete.
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