C1751

DTC C1751/51 Compressor Relay Coil Malfunction

DESCRIPTION

DTC Detection Condition:

The signal from suspension control ECU switches the suspension control relay on, and then the height control compressor motor starts.

Wiring Diagram:

Step 1-2:

Step 2(Continued)-3:

Step 4-5:

Step 5(Continued):

INSPECTION PROCEDURE

NOTE:
- Before performing troubleshooting, inspect the connectors of related circuits.
- Before replacing the suspension control ECU, perform all of the following again: 1) symptom simulation; 2) DTC inspection; and 3) intelligent tester or Techstream inspection (Data List or Active Test). If no malfunctions are found in other areas, replace the suspension control ECU.
- If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed.