DTC P0123[ZJ, ZY, Z6]

id0102c1804300

Without Throttle Valve Actuator

DTC P0123

TP sensor circuit high input

DETECTION CONDITION

•  If the PCM detects that the TP sensor voltage is more than 4.9 V after the ignition switch is turned to the ON position, the PCM determines that the TP sensor 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.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  TP sensor malfunction

•  Connector or terminal malfunction

•  Short to power supply in wiring harness between TP sensor terminal C and PCM terminal 2AA

•  Open circuit in wiring harness between TP sensor terminal B and PCM terminal 2AE

•  PCM malfunction

DTC P0123	TP sensor circuit high input
DETECTION CONDITION	• If the PCM detects that the TP sensor voltage is more than 4.9 V after the ignition switch is turned to the ON position, the PCM determines that the TP sensor 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. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• TP sensor malfunction • Connector or terminal malfunction • Short to power supply in wiring harness between TP sensor terminal C and PCM terminal 2AA • Open circuit in wiring harness between TP sensor terminal B and PCM terminal 2AE • PCM malfunction

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.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT TP SENSOR CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the TP sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 8.
3		No	Go to the next step.
4	INSPECT TP SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between TP sensor terminal C (wiring harness-side) and body ground. • Is the voltage B+?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
4		No	Go to the next step.
5	INSPECT TP SENSOR • Inspect the TP sensor. (See THROTTLE POSITION (TP) SENSOR INSPECTION[ZJ, ZY, Z6].) • Is there any malfunction?	Yes	Replace the TP sensor, then go to Step 8. (See THROTTLE POSITION (TP) SENSOR REMOVAL/INSTALLATION[ZJ, ZY, Z6].)
5		No	Go to the next step.
6	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 8.
6		No	Go to the next step.
7	INSPECT TP SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT • Turn the ignition switch off. • Inspect for continuity between TP sensor terminal B (wiring harness-side) and PCM terminal 2AE (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
8	VERIFY TROUBLESHOOTING OF DTC P0123 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[ZJ, ZY, Z6].)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE[ZJ, ZY, Z6].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE[ZJ, ZY, Z6].)
9		No	DTC troubleshooting completed.

With Throttle Valve Actuator

DTC P0123

TP sensor No.1 circuit high input

DETECTION CONDITION

•  If the PCM detects that the TP sensor No.1 voltage is more than 4.9 V after the ignition switch is turned to the ON position, the PCM determines that the TP sensor No.1 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.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  TP sensor No.1 malfunction

•  Connector or terminal malfunction

•  Open circuit in wiring harness between throttle body terminal F and PCM terminal 2AX

•  Short to power supply in wiring harness between throttle body terminal F and PCM terminal 2AX

•  Open circuit in wiring harness between throttle body terminal C and PCM terminal 2AW

•  PCM malfunction

DTC P0123	TP sensor No.1 circuit high input
DETECTION CONDITION	• If the PCM detects that the TP sensor No.1 voltage is more than 4.9 V after the ignition switch is turned to the ON position, the PCM determines that the TP sensor No.1 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. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• TP sensor No.1 malfunction • Connector or terminal malfunction • Open circuit in wiring harness between throttle body terminal F and PCM terminal 2AX • Short to power supply in wiring harness between throttle body terminal F and PCM terminal 2AX • Open circuit in wiring harness between throttle body terminal C and PCM terminal 2AW • PCM malfunction

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.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT THROTTLE BODY CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the throttle body connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 8.
3		No	Go to the next step.
4	INSPECT TP SENSOR NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between throttle body terminal F (wiring harness-side) and body ground. • Is the voltage B+?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
4		No	Go to the next step.
5	INSPECT TP SENSOR NO.1 • Inspect the TP sensor No.1. (See THROTTLE POSITION (TP) SENSOR INSPECTION[ZJ, ZY, Z6].) • Is there any malfunction?	Yes	Replace the TP sensor, then go to Step 8. (See THROTTLE POSITION (TP) SENSOR REMOVAL/INSTALLATION[ZJ, ZY, Z6].)
5		No	Go to the next step.
6	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 8.
6		No	Go to the next step.
7	INSPECT TP SENSOR NO.1 GROUND CIRCUIT FOR OPEN CIRCUIT • Turn the ignition switch off. • Inspect for continuity between the following terminals: ― Throttle body terminal F (wiring harness-side) and PCM terminal 2AX (wiring harness-side) ― Throttle body terminal C (wiring harness-side) and PCM terminal 2AW (wiring harness-side) • Is there continuity?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
8	VERIFY TROUBLESHOOTING OF DTC P0123 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[ZJ, ZY, Z6].)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE[ZJ, ZY, Z6].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE[ZJ, ZY, Z6].)
9		No	DTC troubleshooting completed.