Pinpoint Test J: Programmable Speedometer/Odometer Module: Description
PSOM receives input from Rear Anti-Lock Brake System (RABS) sensor, which is mounted on rear differential. PSOM sends this input signal information to PCM. DTC 0500 indicates Vehicle Speed Sensor (VSS) malfunction.
Perform this test when directed here by QUICK TEST. This PINPOINT TEST is intended to diagnose:
- PSOM output to PCM.
- PSOM (+) and PSOM (-) wiring harness circuits.
- Powertrain Control Module (PCM).
To prevent replacement of good components, be aware following non-EEC related areas and components may be cause of problem:
- Cruise control system.
- Fault in RABS.
- Ring gear inside differential.
- Instrumentation system.