DTC P0600 - A/T CONTROL Nissan 240SX S14

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.

1. Check Input Signal Circuit Turn ignition off. Disconnect ECM wiring harness connector. Disconnect A/T control unit wiring harness connector. (Scheme 49) Check continuity between the following connector terminals: (Scheme 50) ECM connector terminal No. 24 and A/T control unit connector terminal No 10. ECM connector terminal No. 29 and A/T control unit connector terminal No 11. ECM connector terminal No. 30 and A/T control unit connector terminal No 12. Continuity should be present. If continuity is present, go to next step. If continuity is not present, repair harness or connectors between ECM and A/T control unit.
2. Leave ignition off. Check continuity between the following terminals: ECM connector terminal No. 24 and ground. ECM connector terminal No. 29 and ground ECM connector terminal No. 30 and ground. Continuity should be present. If continuity is present, go to next step. If continuity is not present, repair harness or connectors between ECM and A/T control unit.
3. Check ECM and A/T control unit wiring harness connector pins for damage or corrosion. Check all circuit connector for clean, tight fit. If fault is still present, repeat step 1).

Scheme 49

Scheme 50