Mazda CX 7. Manual - part 131

 

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Mazda CX 7. Manual - part 131

 

 

EMISSION SYSTEM [L3 WITH TC]

01-16–9

01-16

PURGE SOLENOID VALVE REMOVAL/INSTALLATION[L3 WITH TC]

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1. Disconnect the negative battery cable.
2. Remove the charge air cooler duct.
3. Remove in the order indicated in the table.

.

4. Install in the reverse order of removal.

End Of Sie

PURGE SOLENOID VALVE INSPECTION[L3 WITH TC]

id011639800900

Airflow Inspection

Note

• Perform the following test only when directed.

1. Disconnect the negative battery cable.
2. Remove the purge solenoid valve. (See 01-16-9 PURGE SOLENOID VALVE REMOVAL/INSTALLATION[L3 

WITH TC].)

3. Inspect airflow between the ports under the following conditions.

• If not as specified, replace the purge solenoid valve. (See 01-16-9 PURGE SOLENOID VALVE REMOVAL/

INSTALLATION[L3 WITH TC].)

• If as specified, carry out the “Circuit Open/

Short Inspection”.

1

Connector

2

Vacuum hose

3

Purge solenoid valve

3

1

2

2

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A

B

A

B

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Step

: Continuity

: Airflow

Terminal

Port

B

A

B

A

B+

GND

1

2

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EMISSION SYSTEM [L3 WITH TC]

01-16–10

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See 01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH TC].)
2. Inspect the following wiring harnesses for an 

open or short circuit (continuity check).

Open circuit

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

— Purge solenoid valve terminal A and main relay terminal E

— Purge solenoid valve terminal B and PCM terminal 2AB

Short circuit

• If there is continuity, there is a short circuit. Repair or replace the wiring harness.

— Purge solenoid valve terminal A and body ground

— Purge solenoid valve terminal B and power supply

— Purge solenoid valve terminal B and body ground

End Of Sie

WM: CHECK VALVE (EMISSION SYSTEM)

PURGE SOLENOID VALVE

WIRING HARNESS SIDE CONNECTOR

A

B

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FUSE BOX

(MAIN RELAY)

A

E

B

D

FRONT

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2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M

2E

2A

2I

2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P

2H

2D

2L

2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O

2G

2C

2K

2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z

2V 2R 2N

2F

2B

2J

1BE 1BA 1AW 1AS 1AO 1AK 1AG 1AC 1Y 1U 1Q 1M

1E

1A

1I

1BH 1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X

1T

1P

1H

1D

1L

1BG 1BC 1AY 1AU 1AQ 1AM 1AI 1AE 1AA 1W 1S 1O

1G

1C

1K

1BF 1BB 1AX 1AT 1AP 1AL 1AH 1AD 1Z

1V

1R 1N

1F

1B

1J

PCM

WIRING HARNESS-SIDE CONNECTOR

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EMISSION SYSTEM [L3 WITH TC]

01-16–11

01-16

CHECK VALVE INSPECTION[L3 WITH TC]

id011639801400

1. Remove the charge air cooler duct.
2. Disconnect the vacuum hose connected between the check valve and the purge solenoid valve from the purge 

solenoid valve.

3. Disconnect the vacuum hose connected between the check valve and the intake manifold from the intake 

manifold.

4. Blow through the check valve and verify that air flows as specified.

• If not as specified, replace the check valve.

Specification

*

: The check valve is normal if the aeration to port B 

is 3.5 kPa/min {0.03 kgf/cm2 min, 0.5 psi/min} 
or less when 130 kPa {1.32 kgf/cm2, 18.9 psi} 
is applied to port A.

End Of Sie

WM: EGR VALVE

EGR VALVE REMOVAL/INSTALLATION[L3 WITH TC]

id011639801000

1. Disconnect the negative battery cable.
2. Remove the charge air cooler duct.
3. Disconnect the EGR valve connector.
4. Remove the air hose and air duct. (See01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH 

TC])

5. Drain the engine coolant. (See01-12-5 ENGINE COOLANT REPLACEMENT[L3 WITH TC].)
6. Remove in the order indicated in the table.
7. Install in the reverse order of removal.

End Of Sie

Condition

Airflow

Air applied from port A to B

Yes

Air applied from port B to A

No*

PORT B

PORT A

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1

Water hose

2

EGR valve

1

2

R

20—30 N·m 
{2.1—3.0 kgf·m, 
15—22 ft·lbf}

acxuuw00000511

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EMISSION SYSTEM [L3 WITH TC]

01-16–12

EGR VALVE INSPECTION[L3 WITH TC]

id011639801100

Resistance Inspection

Note

• Perform the following test only when directed.

1. Disconnect the negative battery cable.
2. Inspect resistance of the EGR valve coils.

• If not as specified, replace the EGR valve. 

(See 01-16-11 EGR VALVE REMOVAL/
INSTALLATION[L3 WITH TC])

• If as specified, carry out the “Circuit Open/

Short Inspection”.

Terminals

Resistance (ohm)

C— E
C— A
D— B
D— F

8— 9

E

C

D

A
B

F

MAIN
RELAY

PCM

EGR VALVE

2AN

2AR

2AQ

2AM

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E

C

F

D

B

A

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