Test F: No Controller Area Network (CAN) Communication

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

F1-F2:

F3-F6:

F6-F8:

F8-F11:

F12-F14:

Normal Operation
The CAN has an unshielded twisted pair cable, circuits 4-EC7E (GY/RD) and 5-EC7E (BU/RD). The anti-lock brake system (ABS) module, the instrument cluster, the powertrain control module (PCM), the restraint control module (RCM) and the occupant classification sensor 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 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 circuit 4-EC7E (GY/RD) open, short to ground or voltage
- CAN circuit 5-EC7E (BU/RD) open, short to ground or voltage
- DLC C251
- ABS module C135
- instrument cluster C2220
- PCM C175b
- RCM C2041b
- occupant classification sensor C3043
- ABS module
- instrument cluster
- PCM
- RCM
- occupant classification sensor