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Diagnostic Test

CHECK VVEL CAN COMMUNICATION CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.
Disconnect VVEL control module harness connector.

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

ECM		VVEL control module		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F102	54	E14	24	Existed
F102	55	E14	11	Existed

Also check harness for short to ground and power.

Is the inspection result normal?

YES

GO TO STEP 3 .

NO

GO TO STEP 2 .

DETECT MALFUNCTIONING PART

Check the following.
- Harness connector E13, F40
- Harness for open or short between ECM and VVEL control module
Repair open circuit or short to ground or short to power in harness or connectors.

CHECK INTERMITTENT INCIDENT

Refer to INTERMITTENT INCIDENT .

Is the inspection result normal?

YES

GO TO STEP 4 .

NO

Repair or replace.

REPLACE VVEL CONTROL MODULE
1. Replace VVEL control module. Refer to COMPONENT PARTS LOCATION .
2. Go to DESCRIPTION .
GO TO STEP 5 .

PERFORM DTC CONFIRMATION PROCEDURE
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Erase DTC.
4. Perform DTC Confirmation Procedure.
  See DTC LOGIC .
5. Check DTC.
Is the DTC U1003 displayed again?

YES

GO TO STEP 6 .

NO

INSPECTION END

REPLACE ECM
1. Replace ECM. Refer to COMPONENT PARTS LOCATION .
2. Go to DESCRIPTION .
INSPECTION END