Mazda Protege 5. Manual — part 138

INTAKE-AIR SYSTEM [ZM]

01–13A–7

01–13A

IDLE AIR CONTROL (IAC) VALVE INSPECTION [ZM]

A3U011320661W04

Resistance Inspection

Note

•

Perform the following test only as directed.

1. Carry out the “Idle Air Control (IAC) Inspection”. (See 01–03A–57 Idle Air Control (IAC) Inspection.)

•

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

2. Disconnect the negative battery cable.
3. Disconnect the IAC valve connector.
4. Measure the resistance between the IAC valve

terminals using an ohmmeter.

•

If not as specified, replace the IAC valve.
(See 01–13A–6 IDLE AIR CONTROL (IAC)
VALVE REMOVAL/INSTALLATION [ZM].)

•

If as specified, but PID value is failed, carry
out the “Circuit Open/Short Inspection”.
— If there is an open or short circuit, repair

or replace wiring harnesses.

— If the above open or short circuit is okay,

replace IAC valve.

Resistance

7.7—9.3 ohms [23

°°°°

C {73

°°°°

F}]

Circuit Open/Short Inspection

1. Remove the PCM. (See 01–40A–7 PCM REMOVAL/INSTALLATION [ZM].)
2. Connect the SST (104 Pin Breakout Box) to the

PCM as shown.

3. Tighten the connector attaching screw.

Tightening torque

7.9—10.7 N·m {80—110 kgf·cm, 69.5—95.4

in·lbf}

4. Inspect for an open or short circuit in the following

wiring harnesses by probing the applicable
sensor and SST (104 Pin Breakout Box) terminals
with ohmmeter leads.
Open circuit

•

Power circuit (IAC valve connector terminal A
and PCM connector terminal 54)

•

GND circuit (IAC valve connector terminal B and PCM connector terminal 83)

Short circuit

•

Power circuit (IAC valve connector terminal A and PCM connector terminal 54 to GND)

•

GND circuit (IAC valve connector terminal B and PCM connector terminal 83 to GND)

5. Reconnect the IAC valve connector.
6. Reconnect the negative battery cable.

End Of Sie

Y3U113WA3

X3U113WAJ

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INTAKE-AIR SYSTEM [ZM]

01–13A–8

VARIABLE TUMBLE CONTROL SYSTEM (VTCS) DIAGRAM [ZM]

A3U011313012W02

End Of Sie

VARIABLE TUMBLE CONTROL SYSTEM (VTCS) CHECK VALVE (ONE-WAY) REMOVAL/INSTALLATION
[ZM]

A3U011342913W01

1. Disconnect the negative battery cable.
2. Remove the air hose, throttle body and intake manifold. (See 01–13A–5 INTAKE-AIR SYSTEM REMOVAL/

INSTALLATION [ZM].)

3. Remove in the order indicated in the table.

4. Install in the reverse order of removal.

End Of Sie

Z3U0113W004

1

Vacuum hose

2

VTCS check valve (one-way)

X3U113WA5

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INTAKE-AIR SYSTEM [ZM]

01–13A–9

01–13A

VARIABLE TUMBLE CONTROL SYSTEM (VTCS) CHECK VALVE (ONE-WAY) INSPECTION [ZM]

A3U011342913W02

1. Remove the VTCS check valve (one-way). (See 01–13A–8 VARIABLE TUMBLE CONTROL SYSTEM (VTCS)

CHECK VALVE (ONE-WAY) REMOVAL/INSTALLATION [ZM].)

2. Blow through port A and verify that the air flows from port B.

•

If not as specified, replace the VTCS check valve (one-way).

3. Blow through port B and verify that the air does

not flow from port A.

•

If not as specified, replace the VTCS check
valve (one-way).

End Of Sie

VARIABLE TUMBLE CONTROL SYSTEM (VTCS) SHUTTER VALVE ACTUATOR REMOVAL/INSTALLATION
[ZM]

A3U011320153W03

1. Disconnect the negative battery cable.
2. Remove the air hose, throttle body and intake manifold. (See 01–13A–5 INTAKE-AIR SYSTEM REMOVAL/

INSTALLATION [ZM].)

3. Remove in the order indicated in the table.

4. Install in the reverse order of removal.

End Of Sie

Z3U0113W999

1

E-ring

2

Bolt

3

VTCS shutter valve actuator

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INTAKE-AIR SYSTEM [ZM]

01–13A–10

VARIABLE TUMBLE CONTROL SYSTEM (VTCS) SHUTTER VALVE ACTUATOR INSPECTION [ZM]

A3U011320153W04

Operating Inspection

Note

•

Perform the following test only as directed.

1. Carry out the “VTCS Operation Inspection”. (See 01–03A–58 Variable Tumble Control System (VTCS)

Inspection.)

•

If not as specified, perform the further inspection for the VTCS shutter valve actuator.

2. Disconnect the vacuum hose from the VTCS shutter valve actuator.
3. Connect a vacuum pump to the VTCS shutter valve actuator.
4. Apply pressure slowly and inspect the rod

movement of the VTCS shutter valve actuator
under the following condition.

•

If not as specified, replace the VTCS shutter
valve actuator. (See 01–13A–9 VARIABLE
TUMBLE CONTROL SYSTEM (VTCS)
SHUTTER VALVE ACTUATOR REMOVAL/
INSTALLATION [ZM].)

•

If as specified, but “VTCS Operation
Inspection” is failed, inspect the vacuum
hoses for improper routing, kinks or leakage,
and inspect the following:

5. Disconnect the vacuum pump to the VTCS

shutter valve actuator.

6. Reconnect the vacuum hose from the VTCS

shutter valve actuator.

End Of Sie

VARIABLE TUMBLE CONTROL SYSTEM (VTCS) DELAY VALVE REMOVAL/INSTALLATION [ZM]

A3U011318800W03

1. Disconnect the negative battery cable.
2. Remove in the order indicated in the table.

3. Install in the reverse order of removal.

End Of Sie

Pressure (kPa {mmHg,

inHg})

Rod movement

Above –1.2 {–9.0, –0.35}

Not pulled

–3.6— –27.9

{–28— –209, –1.1— –8.2

Start to move

Below –27.9 {–209, –8.2}

Fully pulled

X3U113WA8

1

Vacuum hose

2

VTCS delay valve

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