Nissan Rogue (T33) 2021-Present Service Manual: P0234 Tc System

DTC Description

DTC DETECTION LOGIC

NOTE:

If DTC P0234 is displayed with DTC P0237 or P0238, first perform the trouble diagnosis for DTC P0237 or P0238. Refer to DTC Description or DTC Description.

POSSIBLE CAUSE

• Turbocharger boost sensor

• Turbocharger bypass control valve

• Exhaust manifold and turbocharger assembly

• Disconnection, looseness or improper connection of boost control actuator hose

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

INSPECTION START

NOTE:

Use component function check to check the overall function of the turbocharger system circuit. During this check, DTC might not be confirmed.

Do you have CONSULT?

GO TO 2.

GO TO 3.

CHECK ELECTRIC WASTEGATE CONTROL ACTUATOR

With CONSULT

1. Turn ignition switch ON and engine stopped.

2. On the CONSULT screen, select “ENGINE”>>“ACTIVE TEST”>>“WASTEGATE ACTUATOR”.

3. Operate “Up” or “Down”, set “W/G ACTUATOR POSITION B1” to 0.002 m, and make a quick short note of value “V1” of “W/G ACTUATOR POSI SEN B1”.

4. Operate “Up” or “Down”, set “W/G ACTUATOR POSITION B1” to 0.015 m, and make a quick short note of value “V2” of “W/G ACTUATOR POSI SEN B1”.

Do the values of “V1” and “V2” change (visually, ACTUATOR SHAFT operates) and “V2” minus “V1” becomes equal to or more than 2.6V?

To check malfunction symptom before repair: Refer to Intermittent Incident.

Confirmation after repair: INSPECTION END

Proceed to DTC Diagnosis Procedure.

CHECK ELECTRIC WASTEGATE CONTROL ACTUATOR

Without CONSULT

1. Turn ignition switch OFF.

2. Disconnect Wastegate control actuator harness connector.

3. While checking the POSITION SENSOR OUT voltage with an oscilloscope, apply a voltage of 12 V to the positive or negative terminal.

Does ACTUATOR SHAFT visually operate and POSITION SENSOR OUT voltage change?

To check malfunction symptom before repair: Refer to Intermittent Incident.

Confirmation after repair: INSPECTION END

Proceed to DTC Diagnosis Procedure.

DTC Diagnosis Procedure

CHECK BOOST CONTROL ACTUATOR HOSE

Check disconnection, looseness or improper connection of hose between turbocharger bypass control valve and boost control actuator.

Is the inspection result normal?

GO TO 2.

Repair or replace error-detected parts.

CHECK TURBOCHARGER BYPASS CONTROL VALVE POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect turbocharger bypass control valve harness connector.

3. Turn ignition switch ON.

4. Check the voltage between turbocharger bypass control valve harness connector and ground.

   +		−	Voltage
   Turbocharger bypass control valve
   Connector	Terminal
   F104	1	Ground	Battery voltage

Is the inspection result normal?

GO TO 4.

GO TO 3.

CHECK TURBOCHARGER BYPASS CONTROL VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R harness connector.

3. Check the continuity between turbocharger bypass control valve harness connector and IPDM E/R harness connector.

   Turbocharger bypass control valve		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   F104	1	F35	66	Existed

4. Also check harness for short to ground and short.

Is the inspection result normal?

Perform the trouble diagnosis for power supply circuit.

Repair or replace error-detected parts.

CHECK TURBOCHARGER BYPASS CONTROL VALVE GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between turbocharger bypass control valve harness connector and ECM harness connector.

   Turbocharger bypass control valve		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F104	2	F72	26	Existed

4. Also check harness for short to power.

Is the inspection result normal?

GO TO 5.

Repair or replace error-detected parts.

CHECK TURBOCHARGER BYPASS CONTROL VALVE

Check the turbocharger bypass control valve. Refer to Inspection. Refer to Component Inspection.

Is the inspection result normal?

GO TO 6.

Replace turbocharger bypass control valve. Refer to Exploded View.

CHECK ELECTRIC WASTEGATE CONTROL ACTUATOR

Check the electric wastegate control actuator. Refer to Component Inspection.

Is the inspection result normal?

GO TO 7.

Replace exhaust manifold and turbocharger assembly. Refer to Exploded View.

CHECK TURBOCHARGER BOOST SENSOR

Check the turbocharger boost sensor. Refer to Component Inspection.

Is the inspection result normal?

Check intermittent incident. Refer to Intermittent Incident.

Replace turbocharger boost sensor. Refer to Exploded View.