C1802

C1802 AIR SUS COMPRS RELAY





DTC Logic

DTC DETECTION LOGIC





DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Turn ignition switch ON and wait 10 seconds or more.
2. Select "COMPRESSOR" in "Active Test" in "E-SUS".
3. Touch "ON" and wait 5 seconds or more.
4. Select "Self Diagnostic Result" in "E-SUS".
Is "C1802" detected ?
YES - Go to SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK AIR COMPRESSOR ON SIGNAL FROM AIR LEVELIZER CONTROL MODULE
CONSULT-III
1. Disconnect air compressor relay connector.
2. Turn ignition switch ON.

CAUTION:
Never start the engine.
3. Select "COMPRESSOR" in "Active Test" in "E-SUS".
4. Touch "ON".
5. While operating test item, check voltage between air compressor relay harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 2.
2.CHECK HARNESS BETWEEN AIR LEVELIZER CONTROL MODULE AND AIR COMPRESSOR RELAY
1. Turn ignition switch OFF.
2. Disconnect air levelizer control module connector.
3. Check continuity between air levelizer control module harness connector and air compressor relay harness connector.





4. Check continuity between air levelizer control module harness connector and ground.





5. Check voltage between air levelizer control module harness connector and ground.





Are the inspection results normal?
YES - GO TO 3.
NO - Repair or replace damaged part.
3.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
YES - Replace the air levelizer control module. Removal And Installation.
NO - Repair or replace damaged parts.
4.CHECK AIR COMPRESSOR RELAY GROUND
1. Turn ignition switch OFF.
2. Check continuity between air compressor relay harness connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace damaged part.
5.CHECK AIR COMPRESSOR RELAY
1. Remove the air compressor relay. Air Levelizer Control System.
2. Check continuity between air compressor relay harness connector terminals.





Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Replace the air compressor relay. Air Levelizer Control System.