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DTC P0123 [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed))

BME010200100W27

DTC P0123 | TP circuit high input
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DETECTION CONDITION | • If PCM detects TP sensor voltage at PCM terminal 40 is above 4.96 V after key to ON, PCM determines that TP circuit has a malfunction. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• 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 between TP sensor terminal A and PCM terminal 20 • Short to constant voltage supply circuit between TP sensor terminal B and PCM terminal 40 • PCM malfunction

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 REPAIR INFORMATION AVAILABILITY • Check for related Service Information and/or on-line 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 | VERIFY CURRENT INPUT SIGNAL STATUS - IS CONCERN INTERMITTENT OR CONSTANT • Connect the PCM connector. • Turn the ignition switch to the ON position (Engine off). • Check voltage at PCM terminal 40 while gradually depressing accelerator pedal. • Is voltage 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 POOR CONNECTION OF TP SENSOR CONNECTOR • Disconnect TP sensor connector. • Check for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair or replace suspected terminal, then go to Step 11.
No | Go to the next step.
6 | INSPECT TP SENSOR • Perform TP sensor inspection. (See THROTTLE POSITION (TP) SENSOR INSPECTION [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed))) • Is TP sensor normal? | Yes | Go to the next step.
No | Replace TP sensor, then go to Step 11.
7 | VERIFY TP SENSOR GROUND CIRCUIT FOR OPEN AT TP SENSOR CONNECTOR • Check continuity between TP sensor terminal A (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 • Check 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 (harness-side) and PCM connector terminal 20 (harness-side). Then, go to Step 11.
No | Go to the next step.
9 | CHECK PCM CONNECTOR • Disconnect PCM connector. • Check for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair terminal, then go to Step 11.
No | Go to Step 11.
10 | VERIFY TP SIGNAL CIRCUIT FOR SHORT TO CONSTANT VOLTAGE CIRCUIT • Check continuity between TP sensor connector terminals B and C. • Is there continuity? | Yes | Repair or replace suspected 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. • Turn the ignition switch to the ON position (Engine off). • Clear the DTC from the PCM memory using the WDS or equivalent. • Does the same DTC appear? | Yes | Replace PCM, then go to the next step.
No | Go to the next step.
12 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [AJ].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
No | Troubleshooting completed.