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DTC P0123 [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)

BME010200100214

DTC P0123 | TP circuit high input
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DETECTION CONDITION | • If PCM detects TP sensor voltage at PCM terminal 89 is above 4.96 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 A and PCM terminal 91 • Short to constant voltage supply circuit between TP sensor terminal B and PCM terminal 89

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 above 4.96 V? | Yes | Go to the next step.
No | Intermittent concern exists. Go to INTERMITTENT CONCERNS TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [AJ].)
4 | CHECK TP SENSOR CONNECTOR • Turn the ignition switch off. • Verify that the TP sensor connector is connected securely. • Is connector normal? | Yes | Go to the next step.
No | Connect the connector securely, then go to Step 11.
5 | INSPECT TP SENSOR CONNECTOR FOR POOR CONNECTION • Disconnect TP sensor connector. • Inspect for poor connection (such as damaged/pulled-out terminals, corrosion). • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 11.
No | Go to the next step.
6 | INSPECT TP SENSOR • Perform the TP sensor inspection. (See THROTTLE POSITION (TP) SENSOR INSPECTION [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).) • Is the TP sensor normal? | Yes | Go to the next step.
No | Replace the TP sensor, then go to Step 11.
7 | VERIFY TP SENSOR GROUND CIRCUIT FOR OPEN AT TP SENSOR CONNECTOR • Inspect for continuity between TP sensor terminal A (wiring harness-side) and body ground. • Is there continuity? | Yes | Go to step 10.
No | Go to the next step.
8 | VERIFY TP SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between TP sensor connector terminal A and body ground. • Is there continuity? | Yes | Repair or replace open circuit between TP sensor connector terminal A (wiring harness-side) and PCM connector terminal 91 (wiring harness-side). Then, go to Step 11.
No | Go to the next step.
9 | CHECK PCM CONNECTOR • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out terminals, corrosion). • Is there any malfunction? | Yes | Repair the terminal, then go to Step 11.
No | Go to Step 11.
10 | VERIFY TP SIGNAL CIRCUIT FOR SHORT TO CONSTANT VOLTAGE CIRCUIT • Inspect for continuity between TP sensor connector terminals B and C. • Is there continuity? | Yes | Repair or replace the wiring harness, then go to the next step.
No | Go to the next step.
11 | VERIFY TROUBLESHOOTING OF DTC P0123 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). • Does the same DTC appear? | Yes | Replace the PCM, then go to the next step.
No | Go to the next step.
12 | 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.