Test A: The PCM Does Not Respond To The Scan Tool

PINPOINT TEST A: THE PCM DOES NOT RESPOND TO THE SCAN TOOL

Normal Operation
The PCM communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the network connection to the PCM.

The PCM shares the HS-CAN with the following modules:
- ABS module
- Accessory protocol interface module (APIM) (if equipped)
- Instrument cluster (IC)
- Occupant classification system module (OCSM)
- Restraints control module (RCM)
- Transmission control module (TCM) (if equipped)
- 4X4 control module (if equipped)

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- PCM

A1-A2:

A2-A3:

A3-A4: