VR30DDTT engine

CHECK DTC PRIORITY
If DTC P0236 is displayed with DTC P0237 or P0238, first perform the trouble diagnosis for DTC P0237 or P0238.

Is applicable DTC detected?

YES

Perform diagnosis of applicable. Refer to DTC Description .

NO

GO TO 2.

CHECK TURBOCHARGER BOOST SENSOR POWER SUPPLY

Disconnect turbocharger boost sensor harness connector.
Turn ignition switch ON.

Check the voltage between turbocharger boost sensor harness connector and ground.

+			-	Voltage (Approx.)
Turbocharger boost sensor
Bank	Connector	Terminal
1	F90	2	Ground	5 V
2	F91

Is the inspection result normal?

YES

GO TO 4.

NO

GO TO 3.

CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Refer to Diagnosis Procedure .

Is inspection result normal?

YES

Perform the trouble diagnosis for power supply circuit.

NO

Repair or replace error-detected parts.

CHECK TURBOCHARGER BOOST SENSOR GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between turbocharger boost sensor harness connector and ECM harness connector.

+			-		Continuity
Turbocharger boost sensor			ECM
Bank	Connector	Terminal	Connector	Terminal
1	F90	4	F142	99	Existed
2	F91	4		125

Also check harness for short to power.

Is the inspection result normal?

YES

GO TO 5.

NO

Repair or replace error-detected parts.

CHECK TURBOCHARGER BOOST SENSOR INPUT SIGNAL CIRCUIT

Check the continuity between turbocharger boost sensor harness connector and ECM harness connector.

+			-		Continuity
Turbocharger boost sensor			ECM
Bank	Connector	Terminal	Connector	Terminal
1	F90	1	F142	116	Existed
2	F91	1		119

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

GO TO 6.

NO

Repair or replace error-detected parts.

CHECK TURBOCHARGER BOOST SENSOR
Check the turbocharger boost sensor. Refer to Component Inspection .

Is the inspection result normal?

YES

INSPECTION END

NO

Replace malfunctioning turbocharger boost sensor. Refer to CHARGE AIR COOLER : Exploded View .