P1091

P1091 VVEL ACTUATOR MOTOR RELAY

Description

Power supply for the VVEL actuator motor is provided to the VVEL control module via VVEL actuator motor relay. VVEL actuator motor relay is ON/OFF controlled by the VVEL control module. In addition, when the
VVEL actuator motor relay cannot be controlled by the VVEL control module for some reason, it ON/OFF controlled by ECM.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
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 more than 10 V at idle.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

1.Turn ignition switch ON and wait at least 1 seconds.
2.Turn ignition switch OFF and wait at least 10 seconds.
3.Turn ignition switch ON and wait at least 1 seconds.
4.Check DTC.
Is DTC detected?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. VVEL ACTUATOR MOTOR RELAY POWER SUPPLY CIRCUIT-I

1.Turn ignition switch OFF.
2.Disconnect VVEL actuator motor relay.
3.Check the voltage between VVEL actuator motor relay harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. DETECT MALFUNCTIONING PART

Check the following.
- 50 A fusible link (letter N)
- Harness for open or short between VVEL actuator motor relay and battery
- Repair open circuit, short to ground or short to power in harness or connectors.

3. VVEL ACTUATOR MOTOR RELAY POWER SUPPLY CIRCUIT-II

1.Disconnect VVEL control module harness connector.
2.Check the continuity between VVEL actuator motor relay harness connector and VVEL control module harness connector.





3.Also check harness for short to ground and power.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair open circuit, short to ground or short to power in harness or connectors.

4. VVEL ACTUATOR MOTOR RELAY INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check the continuity between VVEL actuator motor relay harness connector and VVEL control module harness connector.





2.Also check harness for short to ground and power.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair open circuit, short to ground or short to power in harness or connectors.

5. CHECK VVEL ACTUATOR MOTOR RELAY

Refer to "Component Inspection" .
Is the inspection result normal?
YES- GO TO 6.
NO- Replace VVEL actuator motor relay.

6. CHECK ABORT CIRCUIT FOR OPEN AND SHORT

1.Disconnect ECM harness connector.
2.Check the continuity between VVEL control module harness connector and ECM harness connector.





3.Also check harness for short to ground and power.
Is the inspection result normal?
YES- GO TO 8.
NO- GO TO 7.

7. DTECT MALFUNCTIONING PART

Check the following.
- Harness connector E3, F1
- Harness for open or short between ECM and VVEL control module
- Repair open circuit, short to ground or short to power in harness or connectors.

8. CHECK INTERMITTENT INCIDENT

Refer to "Intermittent Incident" Intermittent Incident.
Is the inspection result normal?
YES- GO TO 9.
NO- Repair or replace.

9. REPLACE VVEL CONTROL MODULE

1.Replace VVEL control module. Refer to "Component Parts Location" Locations.
2.Go to "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (VVEL CONTROL MODULE) : Special Repair Requirement" Special Repair Requirement.
- GO TO 10.

10. PERFORM DTC CONFIRMATION PROCEDURE

1.Turn ignition switch ON.
2.Erase DTC.
3.Perform DTC Confirmation Procedure.
See "DTC Logic" .
Is the DTC P1091 displayed again?
YES- GO TO 11.
NO- INSPECTION END

11. REPLACE ECM

1.Replace ECM.
2.Go to "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM) : Special Repair
Requirement".
- INSPECTION END


Component Inspection


1. CHECK VVEL ACTUATOR MOTOR RELAY

1.Turn ignition switch OFF.
2.Remove VVEL actuator motor relay.





3.Check the continuity between VVEL actuator motor relay terminals under the following conditions.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace VVEL actuator motor relay.