Test P: No Controller Area Network (CAN) Communication

PINPOINT TEST P: NO CONTROLLER AREA NETWORK (CAN) COMMUNICATION

P1-P2:

P2-P4:

P4-P6:

P6-P9:

P9-P11:

P11-P13:

P13-P16:

P17:

Normal Operation
The CAN has an unshielded twisted pair cable, circuits 1908 (WH) and 1909 (BK). The anti-lock brake system (ABS) module, the instrument cluster and the powertrain control module (PCM) are all on the CAN. The total resistance values from the module to the data link connector (DLC) must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in one of the high speed CAN circuits, damage to the DLC C251, damage to one of the communications network module connectors, or damage to an in-line connector.

Possible Causes
- CAN circuits 1908 (WH) or 1909 (BK) open, short to ground, or short to voltage
- DLC C251
- ABS module C155
- instrument cluster C220a
- PCM C175
- ABS module
- instrument cluster
- PCM