Mazda 6. Manual — part 119
F–12
INTAKE-AIR SYSTEM
Resonance Chamber Removal Note
1. Remove the front mudguard (LH) before removing the resonance chamber.
Vacuum Hose (Purge Solenoid Valve) Installation Note
1. Fit the vacuum hose (purge solenoid valve) onto
the respective fittings, and install clamps as
shown.
Air Cleaner Case Installation Note
Caution
• Before assembling the air cleaner, verify that the rubber mounts have not fallen off from the air
cleaner bracket (3 locations).
• Always install the air cleaner case using the following procedure.
Note
• When inserting the rubber mounts into the air cleaner case, soapy water can be applied.
1. Verify that the rubber mounts are set in the air cleaner bracket (3 locations).
2. Install the projections on the frame side (2 locations).
3. Verify that the projections on the frame side are installed securely.
4. Install the projection on the engine side (remaining location).
5. Verify that the projection on the engine side installed securely.
End Of Sie
VARIABLE AIR DUCT (VAD) SHUTTER VALVE INSPECTION (L3)
A6E391013000W02
1. Remove the air cleaner case. (See
F–10 INTAKE-AIR SYSTEM REMOVAL/INSTALLATION
.)
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 dose not move, replace the air
cleaner.
End Of Sie
A6E3910W021
Vacuum
kPa {mmHg, inHg}
Rod movement
Below –10 {–75, –3.0}
Starts to move
Above –35 {–263, –10.4}
Fully pulled
A6E3910W031
A6E3910W032
INTAKE-AIR SYSTEM
F–13
F
VARIABLE AIR DUCT (VAD) CONTROL SOLENOID VALVE INSPECTION (L3)
A6E391013000W03
1. Remove the VAD control solenoid valve. (See
F–10 INTAKE-AIR SYSTEM REMOVAL/INSTALLATION
.)
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”.
Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See
.)
2. Inspect the following wiring harness for open or
short (continuity check).
Open circuit
• If there is no continuity, the circuit is open. Repair
or replace the harness.
— VAD control solenoid valve terminal B
(harness-side) and PCM terminal 4C
— VAD control solenoid valve terminal A
(harness-side) and main relay terminal C
(harness-side)
Short circuit
• If there is continuity, the circuit is shorted. Repair
or replace the harness.
— VAD control solenoid valve terminal B
(harness-side) and body GND
— VAD control solenoid valve terminal A (harness-side) and power supply
End Of Sie
VARIABLE AIR DUCT (VAD) CHECK VALVE (ONE-WAY) INSPECTION (L3)
A6E391013000W04
1. Remove the VAD check valve (one-way). (See
F–10 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.
• If not as specified, replace the VAD check valve (one-way).
End Of Sie
IDLE AIR CONTROL (IAC) VALVE INSPECTION
A6E391020661W01
Note
• Perform the following inspection only when directed.
Operation Test
1. Carry out the “Idle Air Control Inspection”. (See
F–229 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.
A6E3910W036
A6E3910W037
A6E3910W038
A6E3910W039
F–14
INTAKE-AIR SYSTEM
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
F–10 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
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
End Of Sie
VARIABLE INTAKE-AIR SYSTEM (VIS) SHUTTER VALVE ACTUATOR INSPECTION (L3)
A6E391013000W05
1. Remove the air hose. (See
F–10 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.
4. Apply vacuum and verify that the rod moves.
• If the rod dose not move, replace the intake
manifold.
End Of Sie
VARIABLE INTAKE-AIR SYSTEM (VIS) CONTROL SOLENOID VALVE INSPECTION (L3)
A6E391013000W06
1. Remove the VIS control solenoid valve. (See
F–10 INTAKE-AIR SYSTEM REMOVAL/INSTALLATION
2. Inspect airflow between the ports under the
following conditions.
• If not as specified, replace the VIS control
solenoid valve.
• If as specified, carry out the “Circuit Open/
Short Inspection”.
Ambient temperature (
°C {°F})
Resistance (ohms)
23 {73}
8.8—10.6
A6E3910W003
Vacuum
kPa {mmHg, inHg}
Rod movement
Below –2.7 {–20, –0.7 }
Starts to move
Above –34.7 {–260, –10.2 }
Fully pulled
A6E3910W008
A6E3910W010
A6E3910W009
INTAKE-AIR SYSTEM
F–15
F
Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See
.)
2. Inspect the following wiring harness for open or
short (continuity check).
Open circuit
• If there is no continuity, the circuit is open. Repair
or replace the harness.
— VIS control solenoid valve terminal A
(harness-side) and PCM terminal 4R
— VIS control solenoid valve terminal B
(harness-side) and main relay terminal C
(harness-side)
Short circuit
• If there is continuity, the circuit is shorted. Repair
or replace the harness.
— VIS control solenoid valve terminal A (harness-side) and body GND
— VIS control solenoid valve terminal B (harness-side) and power supply
End Of Sie
VARIABLE TUMBLE CONTROL SYSTEM (VTCS) SHUTTER VALVE ACTUATOR INSPECTION
A6E391013000W07
F–10 INTAKE-AIR SYSTEM REMOVAL/INSTALLATION
2. Disconnect the vacuum hose from the VTCS
shutter valve actuator.
3. Connect a vacuum pump to the VTCS shutter
valve actuator.
4. Apply vacuum and verify that the rod moves.
• If the rod dose not move, replace the intake
manifold.
End Of Sie
VARIABLE TUMBLE CONTROL SOLENOID VALVE INSPECTION
A6E391013000W08
1. Remove the variable tumble control solenoid valve. (See
F–10 INTAKE-AIR SYSTEM REMOVAL/
2. Inspect airflow between the ports under the following conditions.
• If not as specified, replace the variable tumble control solenoid valve.
• If as specified, carry out the “Circuit Open/Short Inspection”.
Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See
.)
A6E3910W011
Vacuum
kPa {mmHg, inHg}
Rod movement
Below –2.7 {–20, –0.7 }
Starts to move
Above –34.7 {–260, –10.2 }
Fully pulled
A6E3910W015
A6E3910W009
A6E3910W016
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