Engine - Intake-Air System: Other Mazda 3 BK

Open circuit

1. If there is no continuity, the circuit is open. Repair or replace the wiring harness. Throttle actuator terminal F and PCM terminal 2A Throttle actuator terminal E and PCM terminal 2B

Short circuit

1. If there is continuity, the circuit is shorted. Repair or replace the wiring 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 149

Scheme 150

1. Remove the variable intake-air solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [LF]»(ref-177563-S27802206012005060200000) .)
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»(ref-177563-S03941786022005060200000) .

Scheme 151

1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION»(ref-177569-S38589701122005060200000) .)
2. Inspect the following wiring harness for open or short (continuity check).

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

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

Scheme 152

Scheme 153

1. Remove the variable intake-air solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-177563-S01004479692005060200000) .)
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»(ref-177563-S19424113032005060200000) .

Scheme 154

1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION»(ref-177569-S38589701122005060200000) .)
2. Inspect the following wiring harness for open or short (continuity check).

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

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

Scheme 155

Scheme 156

1. Remove the air hose. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [LF]»(ref-177563-S27802206012005060200000) .)
2. Disconnect the vacuum hose from the variable intake-air shutter valve actuator.
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 dose not move, replace the intake manifold.

Scheme 157

Scheme 158

1. Remove the air hose. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-177563-S01004479692005060200000) .)
2. Disconnect the vacuum hose from the variable intake-air shutter valve actuator.
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 dose not move, replace the intake manifold.

Scheme 159

Scheme 160

1. Remove the variable tumble solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [LF]»(ref-177563-S27802206012005060200000) .)
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»(ref-177563-S07176362492005060200000) .

Scheme 161

1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION»(ref-177569-S38589701122005060200000) .)
2. Inspect the following wiring harness for open or short (continuity check).

1. If there is no continuity, the circuit is open. Repair or replace the wiring harness. Variable tumble solenoid valve terminal B and PCM terminal 2Al Variable tumble solenoid valve terminal A and main relay terminal A

1. If there is continuity, the circuit is shorted. Repair or replace the wiring harness. Variable tumble solenoid valve terminal A and body GND Variable tumble solenoid valve terminal B and power supply

Scheme 162

Scheme 163

1. Remove the variable tumble solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-177563-S01004479692005060200000) .)
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 164

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION .)
2. Inspect the following wiring harness for open or short (continuity check).

1. If there is no continuity, the circuit is open. Repair or replace the wiring harness. Variable tumble solenoid valve terminal B and PCM terminal 2Al Variable tumble solenoid valve terminal A and main relay terminal A

1. If there is continuity, the circuit is shorted. Repair or replace the wiring harness. Variable tumble solenoid valve terminal A and body GND Variable tumble solenoid valve terminal B and power supply

Scheme 165

Scheme 166

1. Remove the air hose. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [LF]»(ref-177563-S27802206012005060200000) .)
2. Disconnect the vacuum hose from the variable tumble shutter valve actuator.
3. Connect a vacuum pump to the variable tumble shutter valve actuator.
4. Apply vacuum and verify that the rod moves. If the rod dose not move, replace the intake manifold.

Scheme 167

Scheme 168

1. Remove the air hose. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-177563-S01004479692005060200000) .)
2. Disconnect the vacuum hose from the variable tumble shutter valve actuator.
3. Connect a vacuum pump to the variable tumble shutter valve actuator.
4. Apply vacuum and verify that the rod moves. If the rod dose not move, replace the intake manifold.

Scheme 169

Scheme 170

1. Remove in the order indicated in the table.
2. Install in the reverse order of removal.