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

Mechanical 9 illustrations ~422 words

AIR CLEANER ELEMENT INSPECTION [L3]

  1. Remove the air cleaner element. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-288764-S40241065462008062500000) ).
  2. Verify that the air cleaner element surface is free of dirt. If there is dirt, use an air gun or similar tool to clean the element. If the replacement time limit has passed, replace the element.

Scheme 258

Scheme 258: VARIABLE AIR DUCT (VAD) SHUTTER VALVE INSPECTION [L3]
Scheme 258: VARIABLE AIR DUCT (VAD) SHUTTER VALVE INSPECTION [L3]

Scheme 259

Scheme 259
Scheme 259
  1. Remove the air cleaner case. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-288764-S40241065462008062500000) ).
  2. Disconnect the vacuum hose from the VAD shutter valve actuator.
  3. Connect a vacuum pump to the VAD shutter valve actuator.
  4. Apply vacuum and verify that the rod moves. If the rod does not move, replace the air cleaner. (Scheme 258): Inspecting VAD Shutter Valve Actuator ROD MOVEMENT CHART Vacuum kPa {mmHg, inHg} Rod movement Below-10 {-75,-3.0} Not move Above-35 {-263,-10.4} Fully pulled (Scheme 259): Locating VAD Shutter Valve Actuator

Scheme 260

Scheme 260: VARIABLE AIR DUCT (VAD) CONTROL SOLENOID VALVE INSPECTION [L3]
Scheme 260: VARIABLE AIR DUCT (VAD) CONTROL SOLENOID VALVE INSPECTION [L3]

Scheme 261

Scheme 261
Scheme 261
  1. Remove the VAD control 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 VAD control solenoid valve. If as specified, carry out the "Circuit Open/Short Inspection". (Scheme 260): Checking VAD Control Solenoid Valve (Scheme 261): Identifying VAD Control Solenoid Valve Ports & Connector Terminals

Scheme 262

Scheme 262: Circuit Open/Short Inspection
Scheme 262: Circuit Open/Short Inspection
  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 262): Identifying VAD Control Solenoid Valve Connector Terminals

Scheme 263

Scheme 263: Open circuit
Scheme 263: Open circuit
  1. If there is no continuity, there is an open circuit. Repair or replace the harness. VAD control solenoid valve terminal B and PCM terminal 1K VAD control solenoid valve terminal A and main relay terminal C (Scheme 263): PCM Connector Terminal Identification

THROTTLE ACTUATOR INSPECTION [L3]

Note. Perform the following inspection only when directed.

Resistance Inspection

  1. Disconnect the negative battery cable.
  2. Disconnect the throttle body connector.
  3. Measure the resistance between the throttle actuator terminals using an ohmmeter. If not as specified, replace the throttle body. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-288764-S40241065462008062500000) ). If as specified, carry out the "Circuit Open/Short Inspection".

Specification

Ambient temperature (°C {°F})Resistance (ohm)
Approx. 20 {68}0.3-100

AMBIENT TEMPERATURE SPECIFICATION

Throttle Body Harness Connector. Scheme 264

Scheme 264: Throttle Body Harness Connector
Scheme 264: Throttle Body Harness Connector

Scheme 265

Scheme 265: Circuit Open/Short Inspection
Scheme 265: Circuit Open/Short Inspection
  1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION [L3]»(ref-288753-S02558926152008062500000) ).
  2. Inspect the following wiring harnesses for open or short circuit (continuity check). (Scheme 265): Identifying Throttle Actuator Harness Connector Terminals

Scheme 266

Scheme 266: Open circuit
Scheme 266: Open circuit
  1. If there is no continuity, there is an open circuit. Repair or replace the harness. Throttle actuator terminal F and PCM terminal 2A Throttle actuator terminal E and PCM terminal 2B (Scheme 266): PCM Connector Terminal Identification

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