Diagnostic Aids

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This test is intended to diagnose the following:

• Harness circuit: PSP.
• PSP switch.
• Powertrain Control Module (PCM).

1. 1) Verify Condition
   
   Turn ignition off. Connect NGS scan tool to fuse panel DLC. Start engine. Access PSP PID. Turn steering wheel quickly from lock to lock while observing PSP PID. If PSP PID indicates ON and OFF switching, fault is intermittent. Go to TEST Z  or see procedures in TROUBLE SHOOTING - NO CODES - VILLAGER article. If PSP PID always indicates ON, go to next step. If PSP PID always indicates OFF, go to step  3).
2. 2) Check PSP Switch Operation
   
   Turn ignition off. Connect NGS scan tool to fuse panel DLC. Turn ignition on. Access and observe PSP PID. If PSP PID indicates ON, go to step  4). If PSP PID indicates OFF, replace PSP switch. Restore all electrical connections and repeat QUICK TEST .
3. 3) Simulate Low PSP Signal
   
   Turn ignition off. Connect NGS scan tool to fuse panel DLC and access PSP PID. Disconnect PSP switch. Connect a jumper wire between PSP terminal (Pink wire) and a good chassis ground. Turn ignition on. If PSP PID indicates ON, replace PSP switch. Repeat QUICK TEST . If PSP PID indicates OFF, go to step  5).
4. 4) Check PSP For Short
   
   Turn ignition off. Disconnect PSP switch. Disconnect PCM and inspect connector for damage. Measure resistance between PSP circuit (Pink wire) and chassis ground. See CIRCUIT PIN IDENTIFICATION  table. If resistance is less than 10 k/ohms, repair short to ground in PSP circuit. If resistance is greater than 10 k/ohms, go to next step.
5. 5) Check PSP Circuit Continuity
   
   Turn ignition off. Disconnect PSP switch. Disconnect PCM and inspect connector for damage. Measure resistance between PSP switch connector (Pink wire) and PCM connector terminal No. 35. If resistance is less than 5 ohms, replace PCM. Restore all electrical connections and repeat QUICK TEST . If resistance is greater than 5 ohms, repair open PSP circuit. Restore all electrical connections and repeat QUICK TEST .