DTC P2122:00 [MZ-CD 1.6]

id0102g8708300

DTC P2122:00

Accelerator pedal position (APP) sensor No.1 circuit low
DETECTION CONDITION
•  The PCM monitors the accelerator pedal depression amount using the duty signal from APP sensor No.1. If the duty value from APP sensor No.1 is less than 5 %, the PCM determines that the APP sensor No.1 circuit malfunction.
POSSIBLE CAUSE
•  APP sensor connector or terminal malfunction
•  Short to ground in wiring harness between APP sensor terminal E and PCM terminal 120
•  PCM connector or terminal malfunction
•  APP sensor No.1 signal circuit and ground circuit are shorted to each other
•  APP sensor No.1 malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the 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 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
INSPECT APP SENSOR CONNECTOR CONDITION
•  Switch the ignition to off.
•  Disconnect the APP sensor connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 8.
No
Go to the next step.
4
INSPECT APP SENSOR NO.1 CIRCUIT FOR SHORT TO GROUND
•  APP sensor connector is disconnected.
•  Inspect for continuity between the APP sensor terminal E (wiring harness-side) and body ground.
•  Is there continuity?
Yes
If the short to ground circuit could be detected:
•  Repair or replace the wiring harness for a possible short to ground.
If the short to ground circuit could not be detected:
•  Replace the PCM (short to ground in the PCM internal circuit).
Go to Step 8.
No
Go to the next step.
5
INSPECT PCM CONNECTOR CONDITION
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 8.
No
Go to the next step.
6
INSPECT APP SENSOR NO.1 SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER
•  APP sensor and PCM connectors are disconnected.
•  Inspect for continuity between APP sensor terminals D and E (wiring harness-side).
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to each other, then go to Step 8.
No
Go to the next step.
7
INSPECT APP SENSOR NO.1
•  Reconnect all disconnected connectors.
•  Inspect the APP sensor No.1.
•  Is there any malfunction?
Yes
Replace the accelerator pedal, then go to the next step.
No
Go to the next step.
8
VERIFY THAT DTC P2122:00 TROUBLESHOOTING IS COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  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
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
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.
(See DTC TABLE [MZ-CD 1.6].)
No
DTC troubleshooting completed.