Engine - Intake-Air System (Lf, L3): Other Mazda 3 BL

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

Scheme 290

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 ground Throttle actuator terminal E and power supply Throttle actuator terminal E and ground

Scheme 291

Scheme 292

Scheme 293

Scheme 294

1. Remove the variable intake air solenoid valve. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [LF, L3]»(ref-345212-S03134740962009102000000) ).
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". LF L3

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 2J (California emission regulation applicable model and except for California emission regulation applicable model with LF MTX, L3), 2AJ (Except for California emission regulation applicable model with LF ATX) Variable intake air solenoid valve terminal B and main relay terminal A

Short circuit

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

Scheme 295

Scheme 296

Scheme 297

1. Remove the variable tumble solenoid valve. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [LF, L3]»(ref-345212-S03134740962009102000000) ).
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". LF L3

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 2I (California emission regulation applicable model and except for California emission regulation applicable model with LF MTX, L3), 2AI (Except for California emission regulation applicable model with LF ATX) 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 ground Variable tumble solenoid valve terminal B and power supply

Scheme 298

Scheme 299

1. Remove the air hose. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [LF, L3]»(ref-345212-S03134740962009102000000) ).
2. Disconnect the vacuum hose from the variable intake air shutter valve actuator. LF L3
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 REFERENCE Vacuum kPa {mmHg, inHg} Rod movement Below -2.7 {-21, -0.9} Not operate Above -33.4 {-251, -9.89} Fully pulled

Scheme 300

Scheme 301

1. Remove the air hose. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [LF, L3]»(ref-345212-S03134740962009102000000) ).
2. Disconnect the vacuum hose from the variable tumble shutter valve actuator. LF L3
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. ROD MOVEMENT REFERENCE Vacuum kPa {mmHg, inHg} Rod movement Below -2.7 {-21, -0.9} No operate Above -33.4 {-251, -9.89} Fully pulled

Scheme 302

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