Variable Tumble Control (VTC) Shutter Valve Switch Inspection
VARIABLE TUMBLE CONTROL (VTC) SHUTTER VALVE SWITCH INSPECTIONNOTE: Perform the following inspection only when directed.
Voltage Inspection
1. Turn the ignition switch to ON position (Engine OFF)
2. Verify that the PCM terminal 1N voltage is as shown in the given table when the VTC shutter valve actuator rod is depressed and released by hand.
- If not as specified, perform the "Circuit Open/Short Inspection".
- If there is no open or short circuit, replace the intake manifold.
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Inspect the following harness for open or short. (Continuity check)
Open circuit
- If there is no continuity, the circuit is open. Repair or replace the harness.
- VTC shutter valve switch terminal A (harness-side) and PCM terminal 2K (harness-side)
- VTC shutter valve switch terminal B (harness-side) and PCM terminal 2H (harness-side)
- VTC shutter valve switch terminal C (harness-side) and PCM terminal 1 N (harness-side)
Short circuit
- If there is continuity, the circuit is shorted. Repair or replace the harness.
- VTC shutter valve switch terminal A (harness-side) and power supply
- VTC shutter valve switch terminal A (harness-side) and body GND
- VTC shutter valve switch terminal B (harness-side) and power supply
- VTC shutter valve switch terminal C (harness-side) and power supply
- VTC shutter valve switch terminal C (harness-side) and body GND