Mazda 6 Service Manual: Variable tumble control solenoid valve inspection

Mazda 6 Service Manual / Fuel and emission control systems / Intake-air system / Variable tumble control solenoid valve inspection

1. Remove the variable tumble control solenoid valve. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.)

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

If not as specified, replace the variable tumble control solenoid valve.
If as specified, carry out the Circuit Open/Short Inspection.

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION.)

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

Open circuit

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

- Variable tumble control solenoid valve terminal B (harness-side) and PCM terminal 4T

- Variable tumble control solenoid valve terminal A (harness-side) and main relay terminal C (harness-side)

Short circuit

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

- Variable tumble control solenoid valve terminal B (harness-side) and body GND

- Variable tumble control solenoid valve terminal A (harness-side) and power supply

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