DTC P2404

EVAP system leak detection pump sense circuit problem

DETECTION CONDITION

• The PCM monitors pump load current (EVAP line pressure), while evaporative leak monitor is operating. After obtaining the reference current value, if the time in which the pump load current reaches the reference current value is less than the specification, the PCM determines air filter has a malfunction.

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 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.

• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• Air filter clogging

• EVAP hose bending

• 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

• Inspect the EVAP hose for bending.

• Is the EVAP hose normal?

Yes

Go to the next step.

No

Repair or replace the hose, then go to Step 5.

4

• 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

• Make sure to reconnect all disconnected connectors.

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

• Perform the evaporative system 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.

6

• Perform “AFTER REPAIR PROCEDURE”.

  (See AFTER REPAIR PROCEDURE [LF].)

• Is any DTC present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [LF].)

No

Troubleshooting completed.