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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
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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
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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. (See INTERMITTENT CONCERN TROUBLESHOOTING [AJ].)
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". (See AFTER REPAIR PROCEDURE [AJ].) • Is there any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
No | Troubleshooting completed.