Mazda CX 7. Manual — part 73
ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–247
01-02
End Of Sie
3
VERIFY RELATED PENDING CODE OR
STORED DTCS
• Turn the ignition switch to the OFF then ON
position (Engine off).
• Verify related pending code or stored DTCs.
• Are other DTCs present?
Yes
Go to the next step.
No
Replace the EVAP system leak detection pump, then go to
step 6. (See 01-16-7 EVAPORATIVE EMISSION (EVAP)
SYSTEM LEAK DETECTION PUMP REMOVAL/
INSTALLATION[L3 WITH TC])
4
INSPECT EVAP SYSTEM LEAK DETECTION
PUMP
• Inspect the EVAP system leak detection pump.
(See 01-16-7 EVAPORATIVE EMISSION
(EVAP) SYSTEM LEAK DETECTION PUMP
INSPECTION[L3 WITH TC])
• Is the EVAP system leak detection pump
normal?
Yes
Go to the appropriate DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No
Go to the next step.
5
CHECK EVAP SYSTEM LEAK DETECTION
PUMP CIRCUIT FOR SHORT TO POWER
SUPPLY
• Turn the ignition switch to the ON position.
• Disconnect the EVAP system leak detection
pump connector.
• Measure the voltage between EVAP system
leak detection pump terminal D (harness-side)
and body ground.
• Is the voltage B+?
Yes
Repair or replace the wiring harness, then go to the next
step.
No
Go to the next step.
6
VERIFY TROUBLESHOOTING OF DTC P2402
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Perform the EVAP system test using the M-
MDS.
(See01-03-78 ENGINE CONTROL SYSTEM
OPERATION INSPECTION[L3 WITH TC].)
• Is the same DTC present?
Note
• If EVAP system test function is not
available, take following procedure.
— Start the engine and perform the “EVAP
System Repair Verification Drive Mode”.
(See01-02-10 OBD-II DRIVE MODE[L3
WITH TC].)
— Is the PENDING CODE for this DTC
present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
7
VERIFY AFTER REPAIR PROCEDURE
• Perform the “After Repair Procedure”.
(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No
Troubleshooting completed.
STEP
INSPECTION
ACTION
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ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–248
DTC P2404[L3 WITH TC]
id010239813700
Diagnostic procedure
End Of Sie
DTC P2404
EVAP system leak detection pump sensor circuit malfunction
DETECTION
CONDITION
• The PCM monitors the pump load current (EVAP line pressure), while the EVAP leak monitor is operating.
After obtaining the reference current value, If the pump load current is greater than or equal to the
reference current value plus 2 mA within the specified time, the PCM determines that the air filter has a
malfunction.
Diagnostic support note
• This is a intermittent monitor (CCM).
• MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in
one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive
cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in PCM memory.
POSSIBLE
CAUSE
• Air filter clogging
• EVAP hose bending
• PCM malfunction
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on the repair order, then go
to the next step.
2
VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins and/or on-
line repair information availability.
• Is any related repair information available?
Yes
Perform the repair or diagnostic according to the available
repair information.
• If the vehicle is not repaired, then go to the next step.
No
Go to the next step.
3
CHECK EVAP HOSE BENDING
• Inspect the EVAP hose for bending.
• Is the EVAP hose normal?
Yes
Go to the next step.
No
Repair or replace the suspected hose, then go to Step 5.
4
CHECK AIR FILTER FOR CLOGGING
• Inspect the air filter for clogging.
• Is the air filter normal?
Yes
Go to the next step.
No
Replace the air filter, then go to the next step.
5
VERIFY TROUBLESHOOTING OF DTC P2404
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Perform the EVAP system test using the M-
MDS.
(See01-03-78 ENGINE CONTROL SYSTEM
OPERATION INSPECTION[L3 WITH TC].)
• Is the same DTC present?
Note
• If EVAP system test function is not
available, take following procedure.
— Perform the “EVAP System Repair
Verification Drive Mode”.
(See01-02-10 OBD-II DRIVE
MODE[L3 WITH TC].)
— Is the PENDING CODE for this DTC
present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
6
VERIFY AFTER REPAIR PROCEDURE
• Perform the “After Repair Procedure”.
(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No
Troubleshooting completed.
1871-1U-06B(01-02).fm 248 ページ ２００６年３月１５日 水曜日 午前１０時３２分
ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–249
01-02
DTC P2405[L3 WITH TC]
id010239813800
Diagnostic procedure
End Of Sie
DTC P2405
EVAP system leak detection pump sensor circuit low input
DETECTION
CONDITION
• The PCM monitors the pump load current (EVAP line pressure), while the EVAP leak monitor is operating.
If the current is lower than the specification while the PCM obtains the reference current value, the PCM
determines that the EVAP system leak detection pump orifice has a malfunction.
Diagnostic support note
• This is a intermittent monitor (CCM).
• MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in
one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive
cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in PCM memory.
POSSIBLE
CAUSE
• EVAP system leak detection pump orifice has fallen off
• EVAP system leak detection pump motor malfunction
• PCM malfunction
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on the repair order, then go
to the next step.
2
VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins and/or on-
line repair information availability.
• Is any related repair information available?
Yes
Perform the repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No
Replace the EVAP system leak detection pump, then go to
the next step.
3
VERIFY TROUBLESHOOTING OF DTC P2405
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Perform the EVAP system test using the M-
MDS.
(See01-03-78 ENGINE CONTROL SYSTEM
OPERATION INSPECTION[L3 WITH TC].)
• Is the same DTC present?
Note
• If EVAP system test function is not
available, take following procedure.
— Start the engine and perform the
“EVAP System Repair Verification
Drive Mode”.
(See01-02-10 OBD-II DRIVE
MODE[L3 WITH TC].)
— Is the PENDING CODE for this DTC
present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
4
VERIFY AFTER REPAIR PROCEDURE
• Perform the “After Repair Procedure”.
(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No
Troubleshooting completed.
1871-1U-06B(01-02).fm 249 ページ ２００６年３月１５日 水曜日 午前１０時３２分
ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–250
DTC P2407[L3 WITH TC]
id010239813900
Diagnostic procedure
DTC P2407
EVAP system leak detection pump sensor circuit intermittent
DETECTION
CONDITION
• The PCM monitors pump the load current (EVAP line pressure), while the EVAP leak monitor is operating.
When either of the following is detected6 times or more successively, the PCM determines that the
EVAP system leak detection pump heater has a malfunction:
— While obtaining the reference current value, the change in pump load current exceeds the specification.
— After obtaining the reference current value, the pump load current is kept lower than the maximum pump
load current for more than the specified time.
Diagnostic support note
• This is a intermittent monitor (CCM).
• MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in
one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive
cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in PCM memory.
POSSIBLE
CAUSE
• EVAP system leak detection pump heater malfunction
• PCM malfunction
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on the repair order, then go
to the next step.
2
VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins and/or on-
line repair information availability.
• Is any related repair information available?
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.
3
INSPECT EVAP SYSTEM LEAK DETECTION
PUMP HEATER
• 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?
Yes
Replace the EVAP system leak detection pump, then go to
the next step.
No
Go to the next step.
4
VERIFY TROUBLESHOOTING OF DTC P2407
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Perform the EVAP system test using the M-
MDS.
(See01-03-78 ENGINE CONTROL SYSTEM
OPERATION INSPECTION[L3 WITH TC].)
• Is the same DTC present?
Note
• If EVAP system test function is not
available, take following procedure.
— Start the engine and perform the “EVAP
System Repair Verification Drive Mode”.
(See01-02-10 OBD-II DRIVE MODE[L3
WITH TC].)
— Is the PENDING CODE for this DTC
present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
5
VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No
Troubleshooting completed.
1871-1U-06B(01-02).fm 250 ページ ２００６年３月１５日 水曜日 午前１０時３２分
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