M/T Model
PSP Switch Signal Circuit TroubleshootingM/T Model
1. Turn the ignition switch ON (II).
2. Measure voltage between ECM connector terminals A26 and E20.
Is there less than 1.0 V?
YES - Go to step 3.
NO - Go to step 6.
3. Start the engine.
4. Turn the steering wheel to full lock position.
5. Measure voltage between ECM connector terminals A26 and E20.
Is there battery voltage?
YES - The PSP switch signal is OK.
NO - Go to step 11.
6. Turn the ignition switch OFF.
7. Disconnect the PSP switch 2P connector.
8. Turn the ignition switch ON (II).
9. At the harness side, connect PSP switch 2P connector terminals No.1 and No.2 with a jumper wire.
10. Measure voltage between ECM connector terminals A26 and E20.
Is there less than 1.0 V?
YES - Replace the PSP switch.
NO - Check for these problems:
- An open in the wire between the ECM (E20) and the PSP switch.
- An open in the wire between the PSP switch and G201.
11. Turn the ignition switch OFF.
12. Disconnect the PSP switch 2P connector.
13. Turn the ignition switch ON (II).
14. Measure voltage between ECM connector terminals A26 and E20.
Is there battery voltage?
YES - Replace the PSP switch.
NO - Go to step 15.
15. Turn the ignition switch OFF.
16. Disconnect ECM connector E (31P).
17. Check for continuity between body ground and ECM connector terminal E20.
Is there continuity?
YES - Repair short in the wire between the ECM (E20) and the PSP switch.
NO - Substitute a known-good ECM and recheck. If voltage is normal, replace the original ECM.