P1090

P1090, P1093 VVEL ACTUATOR MOTOR





DTC Logic

DTC DETECTION LOGIC

NOTE:
If DTC P1090 or P1093 is displayed with DTC P1091, first perform the trouble diagnosis for DTC P1091. P1091.






DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 10 V or more at idle.
- GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 10 second.
2. Keep the engine speed at approximately 3,500 rpm for at least 10 seconds under no load.
3. Check DTC.
Is DTC detected?
YES - Proceed to SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.VVEL ACTUATOR MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect VVEL control module harness connector.
2. Disconnect VVEL actuator motor harness connector.
3. Check the continuity between VVEL control module harness connector and VVEL actuator motor harness connector.





4. Also check harness for short to ground and power.
Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
- Harness for open or short between VVEL actuator motor and VVEL control module
- Loose or poor connection for each connector and harness
- Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK VVEL ACTUATOR MOTOR
SEE Component Inspection (VVEL ACTUATOR MOTOR).
Is the inspection result normal?
YES - GO TO 5.
NO - GO TO 4.
4.REPLACE VVEL ACTUATOR SUB ASSEMBLY
Replace VVEL actuator sub assembly. Exploded View.
- INSPECTION END
5.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
YES - GO TO 6.
NO - Repair or replace.
6.REPLACE VVEL CONTROL MODULE
Replace VVEL control module. Service and Repair.
- GO TO 7.
7.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC Confirmation Procedure.
See SEE DTC Logic.
Is the DTC P1090 or P1093 displayed again?
YES - GO TO 8.
NO - INSPECTION END
8.CHECK VVEL ACTUATOR SUB ASSEMBLY
SEE Component Inspection (VVEL ACTUATOR SUB ASSEMBLY).
Is the inspection result normal?
YES - GO TO 10.
NO - GO TO 9.
9.REPLACE VVEL ACTUATOR SUB ASSEMBLY
Replace VVEL actuator sub assembly. Exploded View.
- INSPECTION END
10.CHECK VVEL LADDER ASSEMBLY
Exploded View.
Is the inspection result normal?
YES - GO TO 12.
NO - GO TO 11.
11.REPLACE CYLINDER HEAD, VVEL LADDER ASSEMBLY AND VVEL ACTUATOR SUB ASSEMBLY
Replace cylinder head, VVEL ladder assembly and VVEL actuator sub assembly. Exploded View (Cylinder head)
Exploded View (VVEL ladder assembly and VVEL actuator sub assembly).
- INSPECTION END
12.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END




Component Inspection (VVEL ACTUATOR MOTOR)
1.CHECK VVEL ACTUATOR MOTOR
1. Turn ignition switch OFF.
2. Disconnect VVEL actuator motor harness connector.
3. Check resistance between VVEL actuator motor terminals as per the following.





Is the inspection result normal?
YES - INSPECTION END
NO - GO TO 2.
2.REPLACE VVEL ACTUATOR SUB ASSEMBLY
Replace VVEL actuator sub assembly. Exploded View.
- INSPECTION END




Component Inspection (VVEL ACTUATOR SUB ASSEMBLY)
1.CHECK VVEL ACTUATOR SUB ASSEMBLY
1. Turn ignition switch OFF.
2. Remove VVEL actuator sub assembly. Exploded View.
3. Turn the ball screw shaft to check that it works smoothly.
Is the inspection result normal?
YES - INSPECTION END
NO - GO TO 2.
2.REPLACE VVEL ACTUATOR SUB ASSEMBLY
Replace VVEL actuator sub assembly. Exploded View.
- INSPECTION END