Mazda CX-7 2007 Workshop Manual page 286

Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins and/or on-
line repair information availability.
• Is any related repair information available?
3 VERIFY RELATED PENDING CODE OR
STORED DTC
• Turn the ignition switch to the OFF then ON
position (Engine off).
• Verify related PENDING CODE or stored DTC.
• Is DTC P2405 present?
4 INSPECT EVAP SYSTEM LEAK DETECTION
PUMP CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect EVAP system leak detection pump
connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
5 INSPECT EVAP SYSTEM LEAK DETECTION
PUMP MOTOR CIRCUIT FOR OPEN CIRCUIT
• Disconnect the main relay.
• Inspect continuity between EVAP system leak
detection pump terminal A (harness-side) and
main relay.
• Is there continuity?
6 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
7 INSPECT EVAP SYSTEM LEAK DETECTION
PUMP MOTOR CIRCUIT FOR SHORT TO
GROUND
• Inspect for continuity between EVAP system
leak detection pump terminal D (harness-side)
and body ground.
• Is there continuity?
8 INSPECT EVAP SYSTEM LEAK DETECTION
PUMP MOTOR CIRCUIT FOR OPEN CIRCUIT
• Inspect continuity between EVAP system leak
detection pump terminal D (harness-side) and
PCM terminal 1AS (harness-side).
• Is there continuity?
9 INSPECT EVAP SYSTEM LEAK DETECTION
PUMP
• Perform the EVAP system leak detection pump
inspection.
(See01-16-7 EVAPORATIVE EMISSION
(EVAP) SYSTEM LEAK DETECTION PUMP
INSPECTION[L3 WITH TC].)
• Is the EVAP system leak detection pump
normal?
01-02–244
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Go to the next step.
No Record FREEZE FRAME DATA on the repair order, then go
to the next step.
Yes Perform the repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
Yes Go to appropriate DTC inspection.
(See01-02-249 DTC P2405[L3 WITH TC].)
No Go to the next step.
Yes Repair or replace the terminal, then go to Step 10.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
then go to Step 10.
Yes Repair the terminal, then go to Step 10.
No Go to the next step.
Yes Repair or replace the wiring harness for a short to ground,
then go to Step 10.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
then go to Step 10.
Yes Go to the next step.
No Replace the EVAP system leak detection pump, then go to
the next step.
ACTION