Engine - Intake-Air System (L3): Other Mazda 6 GH

Short circuit

1. If there is continuity, there is a short circuit. Repair or replace the harness. VAD control solenoid valve terminal B and body GND VAD control solenoid valve terminal A and power supply

Scheme 268

1. Remove the VAD check valve (one-way). (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-288764-S40241065462008062500000) ).
2. Blow through A and verify that air flows from B.
3. Blow through B and verify that air does not flow from A. If not as specified, replace the VAD check valve (one-way). (Scheme 268): Identifying VAD Check Valve (One-Way)

1. If there is continuity, there is a short circuit. Repair or replace the harness. Throttle actuator terminal F and power supply Throttle actuator terminal F and GND Throttle actuator terminal E and power supply Throttle actuator terminal E and GND

Scheme 269

Scheme 270

1. Remove the Variable intake air solenoid valve. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-288764-S40241065462008062500000) ).
2. Inspect airflow between the ports under the following conditions. If not as specified, replace the Variable intake air solenoid valve. If as specified, carry out the "Circuit Open/Short Inspection". (Scheme 269): Continuity Check Chart (Scheme 270): Identifying Variable Intake Air Solenoid Valve Ports & Connector Terminal

Scheme 271

1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION [L3]»(ref-288753-S02558926152008062500000) ).
2. Inspect the following wiring harness for open or short circuit (continuity check). (Scheme 271): Identifying Variable Intake Air Solenoid Valve Connector Terminals

Open circuit

1. If there is no continuity, there is an open circuit. Repair or replace the harness. Variable intake air solenoid valve terminal B and PCM terminal 2J Variable intake air solenoid valve terminal A and main relay terminal C

1. If there is continuity, there is a short circuit. Repair or replace the harness. Variable intake air solenoid valve terminal B and body GND Variable intake air solenoid valve terminal A and power supply

Scheme 272

Scheme 273

1. Remove the variable tumble solenoid valve. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-288764-S40241065462008062500000) ).
2. Inspect airflow between the ports under the following conditions. If not as specified, replace the variable tumble solenoid valve. If as specified, carry out the "Circuit Open/Short Inspection". (Scheme 272): Continuity Check Chart (Scheme 273): Identifying Variable Tumble Solenoid Valve Ports & Connector Terminals

Scheme 274

1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION [L3]»(ref-288753-S02558926152008062500000) ).
2. Inspect the following wiring harness for open or short circuit (continuity check). (Scheme 274): Identifying Variable Tumble Solenoid Valve Connector Terminals

1. If there is no continuity, there is an open circuit. Repair or replace the harness. Variable tumble solenoid valve terminal B and PCM terminal 21 Variable tumble solenoid valve terminal A and main relay terminal C

1. If there is continuity, there is a short circuit. Repair or replace the harness. Variable tumble solenoid valve terminal B and body GND Variable tumble solenoid valve terminal A and power supply see scheme 22: PCM Connector Terminal Identification

Scheme 275

1. Remove the air hose. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-288764-S40241065462008062500000) ).
2. Disconnect the vacuum hose from the Variable intake air solenoid valve.
3. Connect a vacuum pump to the Variable intake air shutter valve actuator.
4. Apply vacuum and verify that the rod moves. If the rod does not move, replace the intake manifold. ROD MOVEMENT CHART Vacuum kPa {mmHg, inHg} Rod movement Below -2.7 {-20, -0.7} Not move Above -33.4 {-250, -9.9} Fully pulled (Scheme 275): Locating Variable Intake Air Shutter Valve Actuator

Scheme 276

1. Remove the air hose. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-288764-S40241065462008062500000) ).
2. Disconnect the vacuum hose from the variable tumble solenoid valve.
3. Connect a vacuum pump to the Variable tumble shutter valve actuator.
4. Apply vacuum and verify that the rod moves. If the rod does not move, replace the intake manifold. (Scheme 276): Locating Variable Tumble Shutter Valve Actuator ROD MOVEMENT CHART Vacuum kPa {mmHg, inHg} Rod movement Below -2.7 {-20, -0.7} Not move Above -33.4 {-250, -9.9} Fully pulled

Scheme 277

1. Remove in the order indicated in the table.
2. Install in the reverse order of removal. (Scheme 277): Accelerator Pedal Assembly & Torque Specification