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

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Note

•  Perform the following test only when directed.

Airflow Inspection

1.  Disconnect the negative battery cable.

2.  Remove the VBC solenoid valve. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [WL-C, WE-C].)

3.  Inspect airflow between the ports under the following conditions.

•  If not as specified, replace the VBC solenoid valve. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [WL-C, WE-C].)

•  If as specified, carry out the “Resistance Inspection”.

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Resistance Inspection

1.  Disconnect the negative battery cable.

2.  Disconnect the VBC solenoid valve connector. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [WL-C, WE-C].)

3.  Measure the resistance between the VBC solenoid valve terminals using an ohmmeter.

•  If not as specified, replace the VBC solenoid valve. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [WL-C, WE-C].)

•  If VBC solenoid valve is okay, perform the “Circuit Open/Short Inspection”.

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Circuit Open/Short Inspection

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

2.  Inspect the following wiring harness for open or short circuit (continuity Inspection).

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Open circuit

•  If there is no continuity, the circuit is open. Repair or replace the wiring harness.

―  VBC solenoid valve terminal A and main relay terminal D

―  VBC solenoid valve terminal B and PCM terminal 178

Short circuit

•  If there is continuity, the circuit is shorted. Repair or replace the wiring harness.

―  VBC solenoid valve terminal A and body ground

―  VBC solenoid valve terminal B and power supply

―  VBC solenoid valve terminal B and body ground