Mazda 6 Service Manual: Idle air control (iac) valve inspection

Mazda 6 Service Manual / Fuel and emission control systems / Intake-air system / Idle air control (iac) valve inspection

Note

Perform the following inspection only when directed.

Operation Test

Carry out the Idle Air Control Inspection. (See Idle Air Control System Inspection.)

If not as specified, perform the further inspection for the IAC valve.

Resistance Inspection

1. Disconnect the negative battery cable.

2. Disconnect the IAC valve connector.

3. Measure the resistance between the IAC valve terminals using an ohmmeter.

If not as specified, replace the IAC valve. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.)
If as specified but the Operation Test is failed, carry out the Circuit Open/Short Inspection.

Specification

Circuit Open/Short Inspection

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

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

Open circuit

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

- IAC valve terminal A (harness-side) and PCM terminal 4G

- IAC valve terminal B (harness-side) and PCM terminal 4J

Short circuit

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

- IAC valve terminal A (harness-side) and power supply

- IAC valve terminal A (harness-side) and GND

- IAC valve terminal B (harness-side) and power supply

- IAC valve terminal B (harness-side) and GND

Variable air duct (vad) check valve (one-way) inspection (l3)

1. Remove the VAD check valve (one-way). (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION) 2. Blow through A and verify that air flows from B. 3. Blow through B and verify that air does not flow from A ...

Variable intake-air system (vis) shutter valve actuator inspection (l3)

1. Remove the air hose. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.) 2. Disconnect the vacuum hose from the VIS shutter valve actuator. 3. Connect a vacuum pump to the VIS shutter valve actuator. ...

Other materials:

Mazda 6 Service Manual: Mazda Importer/Distributors
U.S.A. Mazda North American Operations 7755 Irvine Center Drive Irvine, CA 92618-2922 U.S.A. P.O. Box 19734 Irvine, CA 92623-9734 U.S.A. TEL: 1 (800) 222-5500 (in U.S.A.) (949) 727-1990 (outside U.S.A.) CANADA Mazda Canada Inc. 55 Vogell Road, Richmond Hill, Ontario, L4B 3K5 Canada TEL: 1 ...

Mazda 6 Service Manual: i-ACTIVSENSE (Some models)
i-ACTIVSENSE is a collective term covering a series of advanced safety and driver support systems which make use of a Forward Sensing Camera (FSC) and radar sensors. These systems consist of active safety and pre-crash safety systems. These systems are designed to assist the driver in safer dri ...