Dtc P2407[L3 With Tc] - Mazda CX-7 2007 Workshop Manual

DTC P2407[L3 WITH TC]

DTC P2407 EVAP system leak detection pump sensor circuit intermittent
• 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
DETECTION
• This is a intermittent monitor (CCM).
CONDITION
• 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.
• EVAP system leak detection pump heater malfunction
POSSIBLE
• PCM malfunction
CAUSE
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 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?
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?
5 VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
01-02–250
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 Replace the EVAP system leak detection pump, then go to
the next step.
No Go to the next step.
Yes Replace the PCM, then go to the next step.
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No Troubleshooting completed.
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