1. Start the engine, and let it idle.

1. Align the steering wheel straight ahead.

1. Check the PSP SWITCH in the DATA LIST with the HDS.

Is OFF indicated?

YES | - | Go to Step 4 .
NO | - | Go to Step 12 .

1. Turn the steering wheel to the full lock position.

1. 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 .

1. Disconnect the PSP switch 2P connector.

1. 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 .

1. Turn the ignition switch OFF.

1. Jump the SCS line with the HDS.

1. Disconnect ECM/PCM connector E (31P).

1. 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 .■

1. Turn the ignition switch OFF.

1. Disconnect the PSP switch 2P connector.