DTC P0405 [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)]

id0102c4820600

DTC P0405

EGR valve position sensor circuit low input
DETECTION CONDITION
•  The PCM monitors the input voltage from the EGR valve position sensor while the engine is running. If the input voltage is less than 0.1 V, the PCM determines that the EGR valve position sensor circuit has a malfunction.
POSSIBLE CAUSE
•  EGR valve position sensor malfunction
•  Connector or terminal malfunction
•  Short to ground circuit between EGR valve position sensor terminal C and PCM terminal 116.
•  Short to ground circuit between EGR valve position sensor terminal B and PCM terminal 116.
•  Open circuit between EGR valve position sensor terminal C and PCM terminal 116.
•  Open circuit between EGR valve position sensor terminal B and PCM terminal 106.
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  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 INFORMATION AVAILABILITY
•  Verify related service information availability.
•  Is any related service information available?
Yes
Perform repair or diagnosis according to the available service information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT?
•  Connect the M-MDS to the DLC-2.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Run the vehicle under the FREEZE FRAME DATA stored condition.
•  Is the same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists.
Perform the “INTERMITTENT CONCERNS TROUBLESHOOTING”.
(See INTERMITTENT CONCERN TROUBLESHOOTING [WL-C, WE-C].)
4
INSPECT EGR VALVE POSITION SENSOR CONNECTOR FOR POOR CONNECTION
•  Turn the engine switch off.
•  Disconnect the EGR valve position sensor connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step9.
No
Go to the next step.
5
INSPECT EGR VALVE POSITION SENSOR CIRCUIT FOR SHORT TO GROUND
•  Turn the engine switch off.
•  Inspect for continuity between the following terminals:
―  EGR valve position sensor terminal B (wiring harness-side) and body ground
―  EGR valve position sensor terminal C (wiring harness-side) and body ground
•  Is the EGR valve position sensor normal?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 9.
No
Go to the next step.
6
INSPECT EGR VALVE POSITION SENSOR
•  Inspect the EGR valve position sensor.
•  Is there any malfunction?
Yes
Replace the EGR valve, then go to Step 9.
(See EGR SYSTEM REMOVAL/INSTALLATION [WL-C, WE-C].)
No
Go to the next step.
7
INSPECT PCM CONNECTOR FOR POOR CONNECTION
•  Turn the engine switch off.
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to step9.
No
Go to the next step.
8
INSPECT EGR VALVE POSITION SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Turn the engine switch off.
•  Disconnect the PCM connector.
―  EGR valve position sensor terminal B (wiring harness-side) and PCM terminal 106 (wiring harness-side)
―  EGR valve position sensor terminal C (wiring harness-side) and PCM terminal 116 (wiring harness-side)
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to the next step.
9
VERIFY TROUBLESHOOTING OF DTC P0405 COMPLETED
•  Turn the engine switch off.
•  Make sure to reconnect all disconnected connectors.
•  Turn the engine switch to the ON position (Engine off).
•  Clear the DTC from the PCM memory using the M-MDS.
•  Run the vehicle under the FREEZE FRAME DATA stored condition.
•  Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [WL-C, WE-C].)
(See PCM REMOVAL/INSTALLATION (U.K. Specs.) [WL-C, WE-C].)
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “After Repair Procedure“.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)].)
No
Troubleshooting completed.