DTC P0122 [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)

BME010200100213

DTC P0122

TP circuit low input

DETECTION CONDITION

• If PCM detects TP sensor voltage at PCM terminal 89 below 0.16 V after the ignition switch to the ON position, PCM determines that TP circuit has a malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction conditions in first drive cycles.
• PENDING CODE is not available.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE

• TP sensor malfunction
• Connector or terminal malfunction
• Open circuit between TP sensor terminal B and PCM terminal 89
• Short to ground circuit between TP sensor terminal B and PCM terminal 89
• Open circuit between TP sensor terminal C and PCM terminal 90
• Short to ground circuit between TP sensor terminal C and PCM terminal 90

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 FREEZE FRAME DATA on repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY CURRENT INPUT SIGNAL STATUS - IS CONCERN INTERMITTENT OR CONSTANT
• Connect the WDS or equivalent to the DLC-2.
• Start the engine.
• Access TP PID while gradually depressing accelerator pedal.
• Is TP PID below 0.16 V?
Yes
Go to the next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERNS TROUBLESHOOTING procedure.
4
CLASSIFY TP SENSOR OR HARNESS MALFUNCTION
• Disconnect the TP sensor connector.
• Connect a jumper wire between TP sensor terminals B and C (wiring harness-side).
• Access TP PID.
• Is TP PID above 4.9 V?
Yes
Go to the next step.
No
Go to step 6.
5
INSPECT TP SENSOR CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch off.
• Inspect for continuity between TP sensor terminals B and C (part-side).
• Is there continuity?
Yes
Inspect for poor TP sensor connector terminal C connection. Repair or replace if necessary, then go to Step 9.
No
Replace the TP sensor, then go to Step 9.
6
INSPECT POWER SUPPLY CIRCUIT VOLTAGE AT TP SENSOR CONNECTOR
Note
• If DTC P0107 is also retrieved with P0122, then go to CONSTANT VOLTAGE troubleshooting procedure.
• Turn the ignition switch to the ON position (Engine off).
• Measure 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 between TP sensor connector terminal C and PCM connector terminal 90 (wiring harness-side).
Then, go to Step 9.
7
VERIFY TP SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for continuity between TP sensor terminal B (wiring harness-side) and PCM terminal 89.
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to Step 9.
8
VERIFY TP SIGNAL CIRCUIT FOR SHORT TO GROUND
• Inspect for continuity between TP sensor terminal B (wiring harness-side) and body ground.
• Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 9.
No
Go to the next step.
9
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.
• Turn the ignition switch to the ON position (Engine off).
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.