Note. In case of the diagnostic item, the freeze frame data will not be stored in the ECM. This diagnosis does not have 2 trip detection logic, and will not light up the MIL.
- Check Input Signal Circuit Turn ignition off. Disconnect ECM harness connector. see scheme 1 Disconnect A/T control unit harness connector. Using an ohmmeter, check continuity between harness connector terminals: ECM harness connector terminal No. 65 and A/T control unit harness connector terminal No. 47 (Red/Blue wire). (Scheme 21) ECM harness connector terminal No. 66 and A/T control unit harness connector terminal No. 38 (Yellow/Black wire). ECM harness connector terminal No. 73 and A/T control unit harness connector terminal No. 10 (White/Blue wire). ECM harness connector terminal No. 74 and A/T control unit harness connector terminal No. 11 (White/Purple wire). ECM harness connector terminal No. 77 and A/T control unit harness connector terminal No. 12 (Red/White wire). If no continuity exists, repair open wires as required. If continuity exists, go to next step.
- Using an ohmmeter, check continuity between harness connector terminals and ground: ECM harness connector terminal No. 65 (Red/Blue wire) and ground. ECM harness connector terminal No. 66 (Yellow/Black wire) and ground. ECM harness connector terminal No. 73 (White/Blue wire)and ground. ECM harness connector terminal No. 74 (White/Purple wire) and ground. ECM harness connector terminal No. 77 (Red/White wire) and ground. If continuity exists, repair short in wires as required. If no continuity exists, go to next step.
- Check ECM pin terminals for damage or corrosion. Check all circuit connectors for clean, tight fit. If fault is still present, repeat step 1).
