DTC P0406:00 [MZR-CD 2.2]

id0102f3155500

DTC P0406:00

EGR valve position sensor circuit high input
DETECTION CONDITION
•  The PCM monitors input voltage from EGR position sensor when the ignition switch is ON position. If input voltage is more than 4.9 V, the PCM determines that the EGR valve position sensor circuit has a malfunction.
Monitoring condition
•  Battery voltage: 8—20 V
Diagnostic support note
•  The MIL illuminates if the PCM detects the above malfunction condition in first drive cycle.
•  PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA (mode2) and snapshot data are available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  EGR valve position sensor connector or terminal malfunction
•  Short to power supply circuit in wiring harness between EGR valve terminal A and PCM terminal 1CC
•  Short to power supply circuit in wiring harness between EGR valve terminal E and PCM terminal 1AH
•  PCM connector or terminal malfunction
•  Open circuit between EGR valve terminal C and PCM terminal 1BE
•  EGR valve position sensor malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE2)
•  Is DTC P0406:00 on FREEZE FRAME DATA (mode2)?
Yes
Go to the next step.
No
Go to troubleshooting procedures for DTC in FREEZE FRAME DATA (mode2).
(See DTC TABLE [MZR-CD 2.2].)
2
VERIFY FREEZE FRAME DATA (MODE2) OR SNAPSHOT DATA HAVE BEEN RECORDED
•  Have FREEZE FRAME DATA (mode2) or snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (mode2) and snapshot data on the repair order, then go to the next step.
3
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.
4
INSPECT EGR VALVE CONNECTOR FOR POOR CONNECTION
•  Disconnect the EGR valve connector.
•  Inspect for poor connection (such as damaged, pulled-out terminals, corrosion).
•  Is there any malfunction?
Yes
Repair or replace suspected terminal, then go to Step 10.
No
Go to the next step.
5
INSPECT EGR VALVE POSITION SENSOR POWER CIRCUIT FOR SHORT TO POWER SUPPLY
•  Switch the ignition to ON (Engine off).
•  Measure the voltage between EGR valve terminal A and body ground.
•  Is the voltage B+?
Yes
Repair or replace for short to power supply, then go to Step 10.
No
Go to the next step.
6
INSPECT EGR VALVE POSITION SENSOR SIGNAL FOR SHORT TO POWER SUPPLY
•  Switch the ignition to ON (engine off).
•  Measure voltage between EGR valve terminal E (wiring harness-side) and body ground.
•  Is voltage more than 4.9V?
Yes
Repair or replace for short to power supply, then, go to Step 10.
No
Go to the next step.
7
INSPECT PCM CONNECTORS FOR POOR CONNECTION
•  Switch the ignition to off.
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace terminal, then go to Step 10.
No
Go to the next step.
8
VERIFY EGR VALVE POSITION SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT
•  inspect for continuity at wiring harness-side connector between EGR valve terminal C and PCM terminal 1BE.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace for open circuit, then go to Step 10.
9
INSPECT EGR VALVE POSITION SENSOR
•  Perform EGR valve position sensor inspection.
•  Is the EGR valve position sensor normal?
Yes
Go to the next step.
No
Replace the EGR valve, then go to the next step.
(See EGR VALVE REMOVAL/INSTALLATION [MZR-CD 2.2].)
10
VERIFY TROUBLESHOOTING OF DTC P0406:00 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Perform the KOEO or KOER self test.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD 2.2].)
No
DTC troubleshooting completed.