DTC P0046 [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)]

DTC P0046	Variable boost control (VBC) solenoid valve circuit range/performance malfunction
DETECTION CONDITION	• The PCM monitors the driver IC temperature of the VBC solenoid valve. If the temperature of the VBC solenoid valve driver IC in the PCM exceeds 150 °C{320 °F} while the VBC solenoid valve is operating, the PCM determines that there is a VBC solenoid value malfunction.
POSSIBLE CAUSE	• VBC solenoid valve malfunction • PCM malfunction

DTC P0046

Variable boost control (VBC) solenoid valve circuit range/performance malfunction

DETECTION CONDITION

• The PCM monitors the driver IC temperature of the VBC solenoid valve. If the temperature of the VBC solenoid valve driver IC in the PCM exceeds 150 °C{320 °F} while the VBC solenoid valve is operating, the PCM determines that there is a VBC solenoid value malfunction.

POSSIBLE CAUSE

• VBC solenoid valve malfunction

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related service information availability. • Is any related service information available?	Yes	Perform repair or diagnosis according to the available service information. • If the vehicle is not repaired, go to the next step.
No	Go to the next step.
3	VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT? • Connect the M-MDS to the DLC-2. • Clear the DTC from the PCM memory using the M-MDS. • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Go to the next step.
No	Intermittent concern exists. Perform the “INTERMITTENT CONCERNS TROUBLESHOOTING”. (See INTERMITTENT CONCERN TROUBLESHOOTING [WL-C, WE-C].)
4	INSPECT OPERATION OF VBC SOLENOID VALVE • Connect the M-MDS to DLC-2. • Start the engine at idle. • Access VBCV PID. • Visually inspect the guide blade actuator (rod) operation using the VBCV PID of simulation function. • Does the guide blade actuator (rod) move smoothly?	Yes	Go to the next step.
No	Clean the guide blade actuator, then go to the next step.
5	INSPECT VBC SOLENOID VALVE • Inspect the VBC solenoid valve. (See VARIABLE BOOST CONTROL (VBC) SOLENOID VALVE INSPECTION [WL-C, WE-C].) • Is there any malfunction?	Yes	Replace the VBC solenoid valve, then go to the next step.
No	Go to the next step.
6	VERIFY THAT DTC P0046 TROUBLESHOOTING IS COMPLETED • Turn the engine switch off. • Make sure to reconnect all disconnected connectors. • Turn the engine switch to the ON position (Engine off). • Clear the DTC from the memory using the M-MDS. • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [WL-C, WE-C] .) (See PCM REMOVAL/INSTALLATION (U.K. Specs.) [WL-C, WE-C] .)
No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE • Perform the “After Repair Procedure“. (See AFTER REPAIR PROCEDURE [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED

• Has the FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

Record the FREEZE FRAME DATA on the repair order, then go to the next step.

VERIFY RELATED SERVICE INFORMATION AVAILABILITY

• Verify related service information availability.

• Is any related service information available?

Yes

Perform repair or diagnosis according to the available service information.

• If the vehicle is not repaired, go to the next step.

Go to the next step.

VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT?

• Connect the M-MDS to the DLC-2.

• Clear the DTC from the PCM memory using the M-MDS.

• Run the vehicle under the FREEZE FRAME DATA stored condition.

• Is the same DTC present?

Yes

Go to the next step.

Intermittent concern exists.

Perform the “INTERMITTENT CONCERNS TROUBLESHOOTING”.

(See INTERMITTENT CONCERN TROUBLESHOOTING [WL-C, WE-C].)

INSPECT OPERATION OF VBC SOLENOID VALVE

• Connect the M-MDS to DLC-2.

• Start the engine at idle.

• Access VBCV PID.

• Visually inspect the guide blade actuator (rod) operation using the VBCV PID of simulation function.

• Does the guide blade actuator (rod) move smoothly?

Yes

Go to the next step.

Clean the guide blade actuator, then go to the next step.

INSPECT VBC SOLENOID VALVE

• Inspect the VBC solenoid valve.

(See VARIABLE BOOST CONTROL (VBC) SOLENOID VALVE INSPECTION [WL-C, WE-C].)

• Is there any malfunction?

Yes

Replace the VBC solenoid valve, then go to the next step.

Go to the next step.

VERIFY THAT DTC P0046 TROUBLESHOOTING IS COMPLETED

• Turn the engine switch off.

• Make sure to reconnect all disconnected connectors.

• Turn the engine switch to the ON position (Engine off).

• Clear the DTC from the memory using the M-MDS.

• Run the vehicle under the FREEZE FRAME DATA stored condition.

• Is the same DTC present?

Yes

Replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [WL-C, WE-C] .)

(See PCM REMOVAL/INSTALLATION (U.K. Specs.) [WL-C, WE-C] .)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “After Repair Procedure“.

(See AFTER REPAIR PROCEDURE [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)].)

DTC troubleshooting completed.