Exhaust Valve Solenoid Circuit

EXHAUST VALVE SOLENOID CIRCUIT





Description
Receives exhaust valve solenoid signal from suspension control unit. When activated, the exhaust valve solenoid releases air pressure from the suspension control system.




Component Function Check
1.CHECK EXHAUST SOLENOID OPERATION

CAUTION:
While operating this active test, the suspension control system will vent air pressure and the vehicle ride height will lower. Ensure the area around the vehicle is free from obstructions before beginning test.
CONSULT-III
1. Ensure the suspension control system has air pressure and is not drooping in the rear.
2. Select "EXHAUST SOLENOID" of AIR LEVELIZER active test items.
3. While operating test item, check that the exhaust valve solenoid opens to vent air from the system. The vehicle should lower when the exhaust valve solenoid is activated.





Does the system vent properly?
YES - Exhaust valve solenoid is operating normally.
NO - SEE Diagnosis Procedure.




Diagnosis Procedure
Regarding Wiring Diagram information, [1][2]Electrical Diagrams.
1.CHECK EXHAUST VALVE SOLENOID SIGNAL
CONSULT-III





1. Connect suspension control unit connector B3.
2. Turn ignition switch ON.
3. Select "EXHAUST SOLENOID" of AIR LEVELIZER active test items.
4. While test item is operating, check signal between suspension air compressor connector C9 terminal 2 and ground.





Is battery voltage present?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK CONTINUITY OF EXHAUST VALVE SOLENOID CIRCUIT





1. Turn ignition switch OFF.
2. Disconnect suspension control unit connector B3 and suspension air compressor connector C9.
3. Check continuity between suspension control unit connector B3
(A) terminal 9 and suspension air compressor connector C9 (B) terminal 2.





4. Check continuity between suspension control unit connector B3
(A) terminal 9 and ground.





Are the continuity test results as specified?
YES - Replace the suspension control unit. Service and Repair.
NO - Repair harness or connector.
3.CHECK SUSPENSION AIR COMPRESSOR GROUND





1. Turn ignition switch OFF.
2. Check continuity between suspension air compressor connector
C9 terminals 1 and 3 and ground.





Is continuity present?
YES - Replace the suspension air compressor. Service and Repair.
NO - Repair harness or connector.