Mazda Protege 5. Manual - part 141

INTAKE-AIR SYSTEM [FS]

01–13B–6

INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [FS]

A3U011313000W01

Warning

••••

When the engine and intake-air system are hot, they can badly burn. Turn off the engine and wait 
until they are cool before removing the intake-air system.

••••

Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep 
sparks and flames away from fuel.

••••

Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and 
damage. Fuel can also irritate skin and eyes. To prevent this, always complete the “Fuel Line 
Safety Procedure”. (See 01–14–4 BEFORE REPAIR PROCEDURE.)

1. Disconnect the battery negative cable.
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.

.

Z3U0113W008

1

Fresh-air duct

2

Resonance chamber

3

IAT sensor

4

Air cleaner

5

Air cleaner element

6

MAF sensor

7

Air hose

8

Accelerator cable
(See 01–13B–7 Accelerator Cable Installation Note)

9

Throttle body
(See 01–13B–7 Throttle Body Removal Note)
(See 01–13B–7 Throttle Body Installation Note)

10

Solenoid valve bracket

11

PRC solenoid valve

12

Dynamic chamber

13

Intake manifold
(See 01–13B–7 Intake Manifold Removal Note)

14

Intake manifold gasket
(See 01–13B–7 Intake Manifold Gasket Installation 
Note)

15

Dynamic chamber gasket
(See 01–13B–7 Dynamic Chamber Gasket 
Installation Note)

1712-1U-01G(01-13B).fm  6 ページ  ２００１年６月２９日 金曜日 午前９時４２分

INTAKE-AIR SYSTEM [FS]

01–13B–7

01–13B

Throttle Body Removal Note

1. Drain the engine coolant from the radiator before removing the throttle body. (See 01–12–3 ENGINE 

COOLANT REPLACEMENT.) (See 01–12–2 COOLING SYSTEM SERVICE WARNINGS.)

Intake Manifold Removal Note

1. Remove the fuel injector before removing the intake manifold. (See 01–14–21 FUEL INJECTOR REMOVAL/

INSTALLATION.)

Dynamic Chamber Gasket Installation Note

1. To install the dynamic chamber gasket, make 

sure that the convex side of the gasket is facing 
the intake manifold side.

Intake Manifold Gasket Installation Note

1. To install the intake manifold gasket, make sure 

that the convex side of the gasket is facing the 
intake manifold side.

Throttle Body Installation Note

1. Refill the radiator withengine coolant after installing the throttle body. (See 01–12–3 ENGINE COOLANT 

REPLACEMENT.) (See 01–12–2 COOLING SYSTEM SERVICE WARNINGS.)

Accelerator Cable Installation Note

1. Carry out the “ACCELERATOR CABLE INSPECTION/ADJUSTMENT” procedure after installing the 

accelerator cable. (See 01–13B–17 ACCELERATOR CABLE INSPECTION [FS].) (See 01–13B–17 
ACCELERATOR CABLE ADJUSTMENT [FS].)

End Of Sie

X3U113WDE

X3U113WD4

1712-1U-01G(01-13B).fm  7 ページ  ２００１年６月２９日 金曜日 午前９時４２分

INTAKE-AIR SYSTEM [FS]

01–13B–8

IDLE AIR CONTROL (IAC) VALVE REMOVAL/INSTALLATION [FS]

A3U011320661W01

1. Disconnect the battery negative cable.
2. Remove the air hose and throttle body. (See 01–13B–6 INTAKE-AIR SYSTEM REMOVAL/INSTALLATION 

[FS].)

3. Disconnect the IAC valve connector.
4. Remove in the order indicated in the table.

5. Install in the reverse order of removal.

End Of Sie

IDLE AIR CONTROL (IAC) VALVE INSPECTION [FS]

A3U011320661W02

Resistance Inspection

Note

•

Perform the following test only as directed.

1. Carry out the “Idle Air Control (IAC) Inspection”. (See 01–03B–56 Idle Air Control (IAC) Inspection.)

•

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

2. Disconnect the battery negative 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 01–13B–8 IDLE AIR CONTROL (IAC) VALVE REMOVAL/
INSTALLATION [FS].)

•

If as specified, but PID value failed, carry out the “Circuit Open/Short inspection”.
— If there is an open or short circuit, repair or replace wiring harnesses.
— If there is no open or short circuit, replace IAC valve.

Resistance

7.7—9.3 ohms [23 

°°°°

C {73 

°°°°

F}]

1

Bolt

2

IAC  valve

X3U113WD5

Z3U0113W997

1712-1U-01G(01-13B).fm  8 ページ  ２００１年６月２９日 金曜日 午前９時４２分

INTAKE-AIR SYSTEM [FS]

01–13B–9

01–13B

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See 01–40B–7 PCM REMOVAL/INSTALLATION [FS].)
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 battery negative cable.

End Of Sie

VACUUM CHAMBER CHECK VALVE REMOVAL/INSTALLATION [FS]

A3U011342910W01

1. Disconnect the battery negative cable.
2. Remove the air hose, throttle body and intake manifold. (See 01–13B–6 INTAKE-AIR SYSTEM REMOVAL/

INSTALLATION [FS].)

3. Remove in the order indicated in the table.
4. Install in the reverse order of removal.

End Of Sie

VACUUM CHAMBER CHECK VALVE INSPECTION [FS]

A3U011342910W02

1. Remove the vacuum chamber check valve. (See 01–13B–9 VACUUM CHAMBER CHECK VALVE REMOVAL/

INSTALLATION [FS].)

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

•

If not as specified, replace the vacuum chamber check valve.

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

not flow from port A.

•

If not as specified, replace the vacuum 
chamber check valve.

End Of Sie

X3U113WDG

1

Vacuum hose

2

Vacuum chamber check valve

Z3U0113W009

X3U113WD8

1712-1U-01G(01-13B).fm  9 ページ  ２００１年６月２９日 金曜日 午前９時４２分