DTC P1412 [MZ-CD 1.6 (Y6)]


B3E010201400W06

DTC P1412

EGR valve frozen

DETECTION CONDITION

• EGR valve is jammed and stuck
• Maximum time to detect jammed valve exceeded

POSSIBLE CAUSE

• EGR valve malfunction
• Contaminate on EGR valve
• EGR valve position sensor malfunction
• Vent or damage in wiring harness between EGR valve and PCM
• 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 REPAIR INFORMATION AVAILABILITY
• Verify related service 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
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is DTC P1412 on FREEZE FRAME DATA?.
Yes
Go to the next step.
No
Go to the troubleshooting procedures for DTC in FREEZE FRAME DATA.
4
INSPECT WIRING HARNESS FOR VENT AND/OR DAMAGE
• Inspect for vent and/or damage in wiring harness between EGR valve and PCM.
• Is there any malfunction?
Yes
Repair or replace the malfunctioning part, then go to Step 8.
No
Go to the next step.
5
INSPECT OPERATION OF EGR VALVE
• Remove the EGR valve with connector connected.
• Connect the WDS or equivalent to DLC-2.
• Turn the engine switch to the ON position (Engine OFF).
• Access PID <EGRDC>
• Visually inspect the EGR valve operation using the PID <EGRDC> of simulation function.
• Does the EGR valve move smoothly?
Yes
Go to Step 7.
No
Clean the EGR valve, then go to the next step.
6
INSPECT EGR VALVE
• Inspect the EGR valve.
• Is the EGR valve normal?.
Yes
Go to the next step.
No
Replace the EGR valve, then go to Step 8.
7
INSPECT EGR VALVE POSITION SENSOR
• Inspect the EGR valve position sensor.
• Is the EGR valve position sensor normal?.
Yes
Go to the next step.
No
Replace the EGR valve, then go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC P1412 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from PCM memory using WDS or equivalent.
• Start the engine and warm-up to normal operating temperature.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Is the PENDING CODE for this DTC present?
Yes
Replace PCM, then go to the next step.
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform the after repair procedure.
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.