C1803

C1803 AIR SUSPENSION EXH SOL

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
1.Turn ignition switch ON and wait 10 seconds or more.
2.Select "EXHAUST SOLENOID" in "Active Test" in "E-SUS".
3.Touch "ON" and wait 5 seconds or more.
4.Select "Self Diagnostic Result" in "E-SUS".
Is "C1803" detected ?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK EXHAUST SOLENOID ON SIGNAL FROM AIR LEVELIZER CONTROL MODULE

With CONSULT
1.Disconnect air compressor harness connector.
2.Turn ignition switch ON.

CAUTION:
Never start the engine.
3.Select "EXHAUST SOLENOID" in "Active Test" in "E-SUS".
4.Touch "ON".
5.While operating test item, check voltage between air compressor 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

1.Turn ignition switch OFF.
2.Disconnect air levelizer control module harness connector.
3.Check continuity between air levelizer control module harness connector and air compressor harness connector.





4.Check continuity 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

Refer to "Intermittent Incident" Intermittent Incident.
Is the inspection result normal?
YES- Replace the air levelizer control module. Refer to "Removal and Installation" Removal and Installation.
NO- Repair or replace damaged parts.

4. CHECK AIR COMPRESSOR GROUND

1.Turn ignition switch OFF.
2.Check continuity between air compressor harness connector and ground.





Are the inspection results normal?
YES- GO TO 5.
NO- Repair or replace damaged part.

5. CHECK AIR COMPRESSOR (EXHAUST SOLENOID)

Check the air compressor (exhaust solenoid). Refer to "Component Inspection" .
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Replace the air compressor. Refer to "Removal and Installation" Removal and Installation.


Component Inspection


CAUTION:
- Keep the inside of air compressor free of dust.
- Keep the resin stick and resin pipe free of scratches and burrs.

1. CHECK AIR COMPRESSOR (EXHAUST SOLENOID)

1.Remove the air compressor. Refer to "Removal and Installation" Removal and Installation.





2.Insert resin stick (A) 4.7 mm (0.185 in) in diameter into either one of the air compressor air tube holes to prevent leakage of air.
3.Insert resin pipe (B) 4.7 mm (0.185 in) in diameter into the other air tube hole and install air gauge (C) on the tip of the pipe.
4.Apply 12 V between air compressor connector terminal 1 and 2
until the air gauge reading reaches approximately 500 mm Hg (0.67 MPa).

CAUTION:
- Never make the terminals short.
- Connect the fuse between the terminals when applying the voltage.





5.Apply 12 V between air compressor connector terminal 3 and 4 for approximately 2 seconds.

CAUTION:
- Never make the terminals short.
- Connect the fuse between the terminals when applying the voltage.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace the air compressor. Refer to "Removal and Installation" Removal and Installation.