DTC P2122 [L3 Turbo]

id0102b7811700

DTC P2122

Accelerator pedal position (APP) sensor No.1 circuit low input
DETECTION CONDITION
•  The PCM monitors the APS No.1 signal. If the PCM detects that the APP sensor No.1 voltage is below 0.2 V, the PCM determines that the APP sensor No.1 circuit has a malfunction.
Diagnostic support note
•  This is a continuous monitor (CCM).
•  MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA is available.
•  DTCs are stored in the PCM memory.
POSSIBLE CAUSE
•  APP sensor malfunction
•  Connector or terminal malfunction
•  Open circuit between APP sensor terminal F and PCM terminal 1Y
•  Short to ground circuit between APP sensor terminal F and PCM terminal 1Y
•  Open circuit between APP sensor terminal D and PCM terminal 1Q
•  Short to ground between APP sensor terminal D and PCM terminal 1Q

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 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 the 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
CLASSIFY APP SENSOR OR HARNESS MALFUNCTION
•  Connect the M-MDS.
•  Access the APP1 PID.
•  Disconnect the throttle body connector.
•  Connect a jumper wire between APP sensor terminals D and F (wiring harness-side).
•  Is the PID approx. 100%?
Yes
Go to the next step.
No
Go to step 5.
4
INSPECT APP SENSOR
•  Perform the APP sensor inspection.
•  Is the APP sensor normal?
Yes
Inspect for poor APP sensor connector terminal D connection. Repair or replace if necessary, then go to Step 9.
No
Replace the APP sensor, then go to Step 9.
5
INSPECT POWER SUPPLY CIRCUIT VOLTAGE AT APP SENSOR CONNECTOR
•  Turn ignition switch to the ON position (Engine off).
•  Measure the voltage at APP sensor terminal D (wiring harness-side).
•  Is the voltage within 4.5— 5.5 V?
Yes
Go to the next step.
No
Repair or replace open circuit between APP sensor connector terminal D (wiring harness-side) and PCM connector terminal 1Q (wiring harness-side).
Then, then go to Step 9.
6
VERIFY APP1 SIGNAL CIRCUIT FOR SHORT TO GROUND
•  Inspect continuity between APP sensor terminal D (wiring harness-side) and body ground.
•  Is this continuity?
Yes
Repair or replace the suspected wiring harness, then go to the next step.
No
Go to the next step.
7
VERIFY APP1 SIGNAL CIRCUIT FOR OPEN CIRCUIT
•  Turn the ignition switch to off.
•  Inspect continuity between APP sensor terminal F (wiring harness-side) and PCM terminal 1Y (wiring harness-side).
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the suspected wiring harness, then go to Step 9.
8
VERIFY APP1 SIGNAL CIRCUIT FOR SHORT TO GROUND
•  Inspect for continuity between APP sensor terminal F (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace the suspected wiring harness, then go to the next step.
No
Go to the next step.
9
VERIFY TROUBLESHOOTING OF DTC P2122 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Turn ignition switch to the ON position (Engine off).
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine and warm it up completely.
•  Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(SeePCM REMOVAL/INSTALLATION [L3 Turbo].)
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.
(SeeDTC TABLE [L3 Turbo].)
No
Troubleshooting completed.