Test J: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

PINPOINT TEST J: NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION, ALL MODULES ARE NOT RESPONDING

J1-J2:

J3-J4:

J5-J6:

J7-J8:

J8-J10:

J10-J13:

J13-J16:

J16-J18:

J19-J20:

Normal Operation
The HS-CAN uses an unshielded twisted pair cable, circuits 1827 (WH/LG) and 1828 (PK/LG). The powertrain control module (PCM), the anti-lock brake system (ABS) module (if equipped) and the instrument cluster all communicate with the scan tool using the HS-CAN.

Possible Causes
- Fuse
- Circuit 1827 (WH/LG) open, short to ground or voltage (HS-CAN +)
- Circuit 1828 (PK/LG) open, short to ground or voltage (HS-CAN -)
- Circuit 1827 (WH/LG) (HS-CAN +) and circuit 1828 (PK/LG) (HS-CAN -) shorted together
- PCM
- Instrument cluster
- ABS module (if equipped)