C1801

C1801 VHCL HEIGHT SENSOR





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 60 seconds or more.
2. Perform "Self Diagnostic Results" in "E-SUS".
Is "C1801" detected ?
YES - Go to SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK APPEARANCE
Visually check for malfunction of suspension components, installing malfunction, or deformation of vehicle height sensor.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace damaged parts.
2.CHECK POWER SUPPLY CIRCUIT (PART 1)
1. Disconnect vehicle height sensor connector.
2. Turn ignition switch ON.

CAUTION:
Never start the engine.
3. Check voltage between vehicle height sensor harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 3.
3.CHECK POWER SUPPLY CIRCUIT (PART 2)
1. Turn ignition switch OFF.
2. Disconnect air levelizer control module connector.
3. Check continuity between air levelizer control module harness connector and vehicle height sensor harness connector.





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





Is the inspection result normal?
YES - 1. Check intermittent incident. Intermittent Incident.
2. If inspection result is OK, replace the air levelizer control module. Removal And Installation.
NO - Repair or replace damaged parts.
4.CHECK HARNESS BETWEEN AIR LEVELIZER CONTROL MODULE AND VEHICLE HEIGHT SENSOR
1. Turn ignition switch OFF.
2. Disconnect air levelizer control module connector.
3. Check continuity between air levelizer control module harness connector and vehicle height sensor harness connector.





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





Are the inspection results normal?
YES - GO TO 5.
NO - Repair or replace damaged parts.
5.CHECK VEHICLE HEIGHT SENSOR
Check the vehicle height sensor. SEE Component Inspection.
Is the inspection result normal?
YES - GO TO 6.
NO - Replace the vehicle height sensor. Removal And Installation.
6.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.




Component Inspection
1.CHECK VEHICLE HEIGHT SENSOR
1. Remove the vehicle height sensor. Removal And Installation.





2. Check resistance between vehicle height sensor connector terminals.





Are the inspection results normal?
YES - 1. Install the vehicle height sensor. Removal And Installation.
2. Perform "STANDARD VEHICLE HEIGHT SETTING". Work Procedure.
NO - Replace the vehicle height sensor. Removal And Installation.