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Test A: The PCM Does Not Respond To The Scan Tool
PINPOINT TEST A: THE PCM DOES NOT RESPOND TO THE SCAN TOOLA1-A2:
A2-A3:
A4:
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 network with the ABS module, the restraints control module (RCM), the occupant classification sensor module, the four wheel drive (4WD) control module (if equipped), the adaptive front lighting module (if equipped), the steering angle sensor module (if equipped) and the instrument cluster.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- PCM