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Mazda CX 7. Manual - part 129

EMISSION SYSTEM [L3 WITH TC]

01-16–3

01-16

Fuel Tank Side

End Of Sie

TO PURGE SOLENOID VALVE

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Fuel shut-off valve

Rollover valve

Charcoal canister
(See 01-16-6 CHARCOAL CANISTER REMOVAL/
INSTALLATION[L3 WITH TC].)
(See 01-16-6 CHARCOAL CANISTER
INSPECTION[L3 WITH TC].)

EVAP system leak detection pump
(See 01-16-7 EVAPORATIVE EMISSION (EVAP)
SYSTEM LEAK DETECTION PUMP REMOVAL/
INSTALLATION[L3 WITH TC].)
(See 01-16-7 EVAPORATIVE EMISSION (EVAP)
SYSTEM LEAK DETECTION PUMP
INSPECTION[L3 WITH TC].)

Air filter
(See 01-16-5 AIR FILTER INSPECTION[L3 WITH
TC].)

Fuel filler cap
(See 01-16-4 FUEL-FILLER CAP INSPECTION[L3
WITH TC].)

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EMISSION SYSTEM [L3 WITH TC]

01-16–4

EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM DIAGRAM[L3 WITH TC]

id011639800200

End Of Sie

WM: FUEL FILLER CAP

FUEL-FILLER CAP INSPECTION[L3 WITH TC]

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Leakage Inspection

1. Perform the following SST (Evaporative Emission System Tester 134-01049) self-test:

Note

• If the tester does not work correctly during self-test, refer to the tester operators manual for more detailed

procedures.

(1) Verify that the gas cylinder valve is closed and the control valve located on the tester is in the TEST

position. All tester displays should be off at this time.

(2) Connect the long hose (part of SST) to the

tester.

(3) Connect the manifold assembly (part of SST)

to the long hose as shown.

(4) Open the gas cylinder valve and verify the gas

cylinder regulator left gauge reads 69— 82
kPa {0.71— 0.83 kgf/cm

, 10— 12 psi}

(preset at factory).

• If not, refer to the tester operators manual

to contact tester manufacturer.

(5) Press the ON/OFF switch to turn on the SST

and make sure the left display reads 0.0.

(6) Turn the control valve on the tester to the FILL

position.

(7) Verify the left display reading is within 13.9 to 14.0 in of water.

• If not, adjust the pressure using the regulator knob located on the right side of the tester.

(8) Turn the control valve to TEST position and press the START switch.
(9) After the 2-min countdown (left display) is completed, the right display shows the total pressure loss for that

period. A 0.5 in of water loss is acceptable on the self-test.

• If the loss is more than 0.5 in of water, do one or more self-test. If the failed test repeats, check for leak

using the ultrasonic leak detector (part of SST).

2. Press the RESET switch to set the left display reading to 0.0.

FUEL SHUT-OFF
VALVE

ROLLOVER VALVE

CHECK VALVE

EGR VALVE

PCV VALVE

AIR FILTER

EVAP SYSTEM LEAK
DETECTION PUMP

CHARCOAL CANISTER

PURGE SOLENOID VALVE

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EMISSION SYSTEM [L3 WITH TC]

01-16–5

01-16

3. Connect the fuel cap receiver assembly (part of

SST) to the manifold assembly and fuel-filler cap
from the vehicle.

• If the fuel-filler cap is not a genuine part,

replace it.

4. Turn the control valve to the FILL position.
5. Wait (maximum 20 s) until the left display reads

13.9 to 14.0 in of water.

• If the reading is slightly below the

specification, adjust it using the regulator
knob.

• If the reading is far below, the fuel-filler cap

has leak. Replace it.

6. Turn the control valve to the TEST position and

press the START switch.

7. After the 2-min countdown (left display) is completed, check the test result (the failed/passed light on the

tester).

• If the green light turns on, the fuel-filler cap is normal.

• If the red light turns on, the fuel-filler cap has leakage. Replace it.

8. Close the gas cylinder valve.
9. Turn the control valve to the FILL position.

10. Press the ON/OFF switch to turn off the tester.

End Of Sie

WM: AIR FILTER (EMISSION SYSTEM)

AIR FILTER INSPECTION[L3 WITH TC]

id011639800600

1. Remove the air filter.
2. Blow from port A and verify that there is airflow from port B.

• If not as specified, replace the air filter.

3. Blow from port B and verify that there is airflow

from port A.

• If not as specified, replace the air filter.

End Of Sie

WM: CHARCOAL CANISTER

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EVAP SYSTEM LEAK
DETECTION PUMP
SIDE

ATMOSPHERE
SIDE

B6U0116W004

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EMISSION SYSTEM [L3 WITH TC]

01-16–6

CHARCOAL CANISTER REMOVAL/INSTALLATION[L3 WITH TC]

id011639801500

1. Remove the under cover (LR).
2. Remove in the order indicated in the table.

3. Install in the reverse order of removal.

End Of Sie

CHARCOAL CANISTER INSPECTION[L3 WITH TC]

id011639800500

1. Remove the charcoal canister. (See01-16-6 CHARCOAL CANISTER REMOVAL/INSTALLATION[L3 WITH

TC].)

2. Plug ports A and C, then blow air into port B.

Caution

• Do not apply the pressure more than 20

kPa {0.2 kgf/cm

, 2.9 psi} to the charcoal

canister. Doing so will damage the
charcoal canister.

3. Verify that there is no air leakage from the case.

• If not as specified, replace the charcoal

canister. (See01-16-6 CHARCOAL
CANISTER REMOVAL/INSTALLATION[L3
WITH TC].)

End Of Sie

WM: EVAP SYSTEM LEAK DETECTION PUMP

Evaporative hose

Quick release connector
(See 01-14-19 QUICK RELEASE CONNECTOR
REMOVAL/INSTALLATION[L3 WITH TC])

Charcoal canister

Charcoal canister bracket

N·m {kgf·cm,in·lbf}

9.0—13.0
{92—132, 80—115}

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