Test A: The Powertrain Control Module (PCM) Does Not Respond To The Scan Tool or No High Speed Controller Area Network (HS-CAN)

PINPOINT TEST A: THE POWERTRAIN CONTROL MODULE (PCM) DOES NOT RESPOND TO THE SCAN TOOL OR NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION

A1-A2:

A3-A4:

A5-A8:

A8-A11:

A12-A14:

A14-A15:

A15-A16:

A17-A20:

A20-A23:

A23-A25:

A26-A27:

Normal Operation
The PCM communicates with the scan tool through the HS-CAN. Circuits 1827 (WH/LG) (HS-CAN +) and 1828 (PK/LG) (HS-CAN -) provide the network connection to the PCM. The PCM shares the HS-CAN network with the anti-lock brake system (ABS) with roll stability control module (if equipped), and the instrument cluster. Voltage for the PCM is provided by circuits 361 (RD) and 3049 (BK/LG). Circuits 570 (BK/WH) and 875 (BK/LB) provide ground.

Possible Causes
- Fuse
- Circuit 361 (RD) open
- Circuit 570 (BK/WH) open
- Circuit 875 (BK/LB) open
- 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
- Circuit 3049 (BK/LG) open
- PCM
- Instrument cluster
- ABS module with roll stability control (if equipped)