Test S: The Power Steering Control (PSC) Module Does Not Respond To The Scan Tool

PINPOINT TEST S: THE POWER STEERING CONTROL (PSC) MODULE DOES NOT RESPOND TO THE SCAN TOOL

S1-S2:

S2-S3:

S4-S5:

Normal Operation
The PSC module communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits 1908 (WH) (HS-CAN +) and 1909 (BK) (HS-CAN -) provide the network connection to the PSC module. The PSC module shares the HS-CAN network with the powertrain control module (PCM), the transmission control module (TCM), the anti-lock brake system (ABS) module, the four wheel drive (4WD) control module, the traction battery control module (TBCM) and the instrument cluster. Voltage for the PSC module is provided by circuits 838 (LG/VT) and 601 (LB/PK). Ground is provided by circuit 57 (BK).

Possible Causes
- Fuse
- Circuit 57 (BK) open
- Circuit 601 (LB/PK) open
- Circuit 838 (LG/VT) open
- Circuit 1908 (WH) open (HS-CAN +)
- Circuit 1909 (BK) open (HS-CAN -)
- PSC module