AWC Pump Relay System Circuit
Refer to DTC C161D: ELECTRIC PUMP RELAY CIRCUIT SYSTEM (MALFUNCTION) .
CAUTION:
- If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
- Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
- Since the fluid in the hydraulic unit will be hardened under low temperature, the load of the pump increases and the motor may not operate normally. Therefore, completely remove snow and ice from the hydraulic unit and leave the vehicle under temperature of 0°C (32°F) or higher for 4 hours or more before performing the troubleshooting.