DTC P0122 [L3 R.H.D.]

id0102a2804200

DTC P0122

TP sensor circuit low input

DETECTION CONDITION

• If the PCM detects the TP sensor voltage at PCM terminal 76 is below 0.1 V while the engine running to on, the PCM determines that the TP circuit has malfunction.
Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
• The PENDING CODE is available if the PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE

• TP sensor malfunction
• Connector or terminal malfunction
• Open circuit in wiring harness between TP sensor terminal B and PCM terminal 76
• Short to ground in wiring harness between TP sensor terminal B and PCM terminal 76
• Open circuit in wiring harness between TP sensor terminal C and PCM terminal 101

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 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
CLASSIFY TP SENSOR OR WIRING HARNESS MALFUNCTION
• Connect the WDS or equivalent.
• Access the TP PID.
• Disconnect the TP sensor connector.
• Connect a jumper wire between TP sensor terminals B and C (wiring harness-side).
• Is the voltage above 4.9 V?
Yes
Go to the next step.
No
Go to step 5.
4
INSPECT TP SENSOR
• Perform TP sensor inspection.
• Is the TP sensor normal?
Yes
Inspect TP sensor terminal C for poor connection. Repair or replace if necessary, then go to Step 7.
No
Replace the TP sensor, then go to Step 7.
5
INSPECT POWER SUPPLY CIRCUIT VOLTAGE AT TP SENSOR CONNECTOR
Note
• If DTC P0107 is also retrieved with P0122, go to the CONSTANT VOLTAGE troubleshooting procedure.
• Turn the ignition switch to the ON position (engine off).
• Inspect the voltage at TP sensor terminal C (wiring harness-side).
• Is the voltage within 4.5- 5.5 V?
Yes
Go to the next step.
No
Repair or replace open circuit in wiring harness between TP sensor connector terminal C and PCM terminal 101 (wiring harness-side).
Then, go to Step 7.
6
VERIFY TP SIGNAL CIRCUIT FOR SHORT TO GROUND
• Inspect for continuity between TP sensor terminal B (harness-side) and body ground.
• Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 7.
No
Go to the next step.
7
VERIFY TROUBLESHOOTING OF DTC P0122 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
• Are any DTCs present?
Yes
Go to the applicable DTC troubleshooting.
No
Troubleshooting completed.