PR25DD engine

1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector.

   ECM				Voltage
   +		-
   Connector	Terminal	Connector	Terminal
   F90	96	E31	162	Battery voltage

Is the inspection result normal?

YES

GO TO 3.

NO

GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between ECM harness connector and IPDM E/R harness connector.

   +		-		Continuity
   ECM		IPDM E/R
   Connector	Terminal	Connector	Terminal
   F90	96	F10	78	Existed

5. Also check harness for short to ground.

Is the inspection result normal?

YES

Perform the trouble diagnosis for power supply circuit.

NO

Repair or replace error-detected parts.

1. Disconnect intake manifold tuning valve motor harness connector.
2. Check the continuity between intake manifold tuning valve motor harness connector and ECM harness connector.

   +		-		Continuity
   Intake manifold tuning valve motor		ECM
   Connector	Terminal	Connector	Terminal
   F114	1	F90	112	Not existed
   			111	Existed
   	2		112	Existed
   			111	Not existed

3. Also check harness for short to ground and to power.

Is the inspection result normal?

YES

GO TO 4.

NO

Repair or replace error-detected parts.

Check the intake manifold tuning valve motor. Refer to DTC Description .

Is the inspection result normal?

YES

Check intermittent incident. Refer to Inspection .

NO

Replace intake manifold assembly. Refer to Removal & Installation .