VARIABLE BOOST CONTROL (VBC) SOLENOID VALVE INSPECTION [MZR-CD (RF Turbo)]

Air Tightness Inspection

1. Connect a vacuum pump to the VBC solenoid valve port A, and apply vacuum.

Note

• Even if there is vacuum leakage, the VBC solenoid valve is okay if vacuum increases to -47 kPa {-353 mmHg, -14 inHg} or more.

2. Verify that the vacuum increases to -47 kPa {-353 mmHg, -14 inHg} or more.

• If not as specified, replace the VBC solenoid valve.

• If VBC solenoid valve is okay, perform the "Operation Inspection".

Operation Inspection

1. Connect a vacuum pump to the VBC solenoid valve port A, and apply vacuum.

2. Turn the engine switch to ON.

3. Simulate the VBCV PID to 100 % using the WDS or equivalent.

4. Verify that the vacuum is decreased.

• If not as specified, replace the VBC solenoid valve.

• If VBC solenoid valve is okay, perform the "Resistance Inspection".

Resistance Inspection

Note

• Perform the following test only when directed.

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

• If not as specified, replace the VBC solenoid valve.

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

11-13 kilohms [20°C {68°F}]

Circuit Open/Short Inspection

1. Inspect for open/short circuit in the following wiring harnesses.

• If there is open/short circuit, repair or replace wiring harnesses.

Open circuit

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

- VBC solenoid valve terminal A (harness-side) and PCM control relay terminal C

- VBC solenoid valve terminal B (harness-side) and PCM connector terminal 67

Short circuit

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

- VBC solenoid valve terminal B (harness-side) and GND

- VBC solenoid valve terminal B (harness-side) and power supply