C1745

DTC C1745/45 Exhaust Solenoid Valve Circuit Malfunction

DESCRIPTION

DTC Detection Condition:

The exhaust valve is installed onto the height control compressor. Based on signals from the suspension control ECU, the exhaust valve opens the exhaust solenoid valve, which releases the high pressure air within the system out of the vehicle. The exhaust valve operates until the target vehicle height is achieved. When achieved, the height control sensor outputs a signal to the suspension control ECU to stop the operation of the exhaust valve.

Wiring Diagram:

Step 1-3:

Step 4-5:

Step 5(Continued):

INSPECTION PROCEDURE

NOTE:
- Before performing troubleshooting, inspect the connectors of related circuits.
- If DTC C1782/82 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782/82 first.
- 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.