Mazda CX-7 2007 Workshop Manual page 393

SYMPTOM TROUBLESHOOTING [L3 WITH TC]
Evaporative system test procedure
1. Select the EVAP system test from the Toolbox on the M-MDS display and follow the instructions.
2. Verify that all of the following PIDs are within the specifications at the pre-test confirmation screen.
Note
• To successfully perform this procedure, all PIDs must be within the following specifications before
proceeding to the next step.
• The PCM will cancel the EVAP system test if the B+ PID value falls lower than 11.0 V during the test.
Specification
PID
BARO
FLI
IAT
B+
3. Start the engine.
4. Drive the vehicle or let the engine idle more than 20 min.
5. Turn the ignition switch off, then turn it to the ON position again (Key On Engine Off).
6. Press the tick icon to start the test.
7. Verify that no DTCs are present after the completion of the test.
• If any test result is indicated with red, diagnose the problem using the following DTC troubleshooting procedure
or component inspection procedure.
• If any DTCs are detected, diagnose the problem using the appropriate DTC troubleshooting procedure.
EVAP system leak inspection using leak tester
1. Perform the following SST (EVAP System Tester 134-01049) self-test:
Note
• If the tester does not work correctly during the self-test, refer to the tester operators manual for a more
detailed self-test procedure.
(1) Verify that the control valve on the panel is in
the HOLD position, then open the nitrogen
bottle valve.
(2) Connect the vehicle interface hose (part of
the SST) to the SELF TEST port located on
the control panel. Hand tighten the fitting. (Do
not overtighten.)
(3) Turn the control valve to the TEST position.
(4) The gauge should read 331— 381 mm {13—
15 in} of water.
• If the gauge is not reading in this range,
adjust the pressure by turning the black
knob on the low pressure regulator at the
nitrogen bottle.
(5) Turn the control valve to the HOLD position.
(6) Verify that the gauge holds pressure and that
the flow meter reads no flow.
• If there is no drop in pressure and no flow,
the tester passes the self-test.
• If the gauge leaks down, refer to the
operators manual.
PID Range
72.2 kPa {543 mmHg, 21.3 inHg} or more
15— 85%
5— 45 °C {41— 113 °F}
11.0 V or more
PRESSURE
VALVE "TEST AND HOLD"
GAUGE
SELF-TEST
PORT
.020 TEST
PORT
.040 TEST
PORT
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