C1805

Exhaust Valve Solenoid System Inspection

INSPECTION PROCEDURE
1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.

C1803/C1805:

Is the above displayed in the self-diagnosis display items?
YES >> If code C1803 was retrieved during self-diagnosis, GO TO 3. If code C1805 was retrieved during self-diagnosis, GO TO 2.
NO >> Inspection End.

2. CHECK SYSTEM OPERATION
1. Load vehicle to standard laden condition (with driver, front passenger, 2 passengers in second row seats and no cargo).
2. Conduct active test of "COMPRESSOR" to raise vehicle ride height to +20 mm.

CAUTION: The "COMPRESSOR" active test will remain ON until it is turned off using CONSULT-II. Allowing the compressor to run for an extended period of time may cause damage to air suspension system components due to excessive pressure in the air suspension system.

3. Return the rear load leveling air suspension system to normal operating mode.
4. Check self-diagnostic results.
Is code C1805 displayed again?
YES >> GO TO 3.
NO >> Inspection End.

3. CONNECTOR INSPECTION
1. Disconnect suspension control unit connector B3 and suspension air compressor C9.
2. Check the terminals for deformation, disconnection, looseness or damage..
OK or NG
OK >> If code C1805 was retrieved during self-diagnosis, GO TO 4. If code C1803 was retrieved during self-diagnosis, GO TO 6.
NG >> Repair or replace as necessary.

4. AIR HOSE INSPECTION
Inspect for pinched or damaged air hoses between the suspension air reservoir and each load leveling rear air suspension shock absorber.
OK or NG
OK >>GO TO 5.
NG >> Repair or replace as necessary.

5. EXHAUST VALVE SOLENOID INSPECTION





Apply 12V to suspension air compressor terminal 2 and ground to suspension air compressor terminal 1.
System air pressure should vent..
OK or NG
OK >> GO TO 6.
NG >> Replace the suspension air compressor.

6. CHECK EXHAUST VALVE SOLENOID POWER AND GROUND
1. Reconnect the suspension control unit connector.
2. Turn the ignition switch ON.





3. Check voltage between suspension air compressor connector C9 terminal 2 and ground.
Voltage: Approximately 12V
4. Turn ignition switch OFF.





5. Check continuity between suspension air compressor connector C9 terminal 1 and ground.
1 - Ground Continuity should exist.
OK or NG
OK >> Replace the suspension control unit.
NG >> Repair harness or connector.