DTC P2407

EVAP system leak detection pump sense circuit intermittent

DETECTION CONDITION

• The PCM monitors pump load current (EVAP line pressure), while evaporative leak monitor is operating. When either of the following is detected 6 times or more successively, the PCM determines 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).

• The 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 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.

• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• EVAP system leak detection pump heater malfunction

• PCM malfunction

STEP

INSPECTION

ACTION

1

• Has FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

No

Record the FREEZE FRAME DATA on the repair order, then go to the next step.

2

• Verify related Service Bulletins and/or on-line repair information availability.

• Is any related repair information available?

Yes

Perform 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

• Perform EVAP system leak detection pump inspection.

  (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP INSPECTION [LF].)

• Is the EVAP system leak detection pump normal?

Yes

Replace the EVAP system leak detection pump, then go to the next step.

(See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP REMOVAL/INSTALLATION [LF].)

No

Go to the next step.

4

• Make sure to reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

• Perform the evaporative emission test using the M-MDS.

  (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [LF].)

• Is the same DTC present?

  NOTE:

  • If evaporative system test function is not available, perform the following procedure:

• Perform the EVAP System Repair Verification Drive Mode.

  (See OBD-II DRIVE MODE [LF].)

• Is the PENDING CODE the same as the DTC present?

Yes

Replace the PCM, then go to the next step.

(SeePCM REMOVAL/INSTALLATION [LF].)

No

Go to the next step.

5

• Perform “AFTER REPAIR PROCEDURE”.

  (See AFTER REPAIR PROCEDURE [LF].)

• Is there any DTC present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [LF].)

No

Troubleshooting completed.