Start the engine, and let it idle. Align the steering wheel straight ahead. Check the PSP SWITCH in the DATA LIST with the HDS. Is OFF indicated?
YES | - | Go to Step 4 .
NO | - | Go to Step 12 .
Turn the steering wheel to the full lock position. Check the PSPSW in the DATA LIST with the HDS. Does it change to OFF?
YES | - | The PSP switch signal circuit is OK.■
NO | - | Go to Step 6 .
Disconnect the PSP switch 2P connector. Check the PSPSW in the DATA LIST with the HDS. Does it change to OFF?
YES | - | Replace the PSP switch .■
NO | - | Go to Step 8 .
Turn the ignition switch OFF. Jump the SCS line with the HDS. Disconnect ECM/PCM connector E (31P). Check for continuity between PSP switch 2P connector terminal No. 1 and body ground. Is there continuity?
YES | - | Repair short in the wire between ECM/PCM (E16) and the PSP switch.
NO | - | Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM / PCM .■
Turn the ignition switch OFF. Disconnect the PSP switch 2P connector. |