Diagnostic procedure

DTC P0123 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 FREEZE FRAME DATA on repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Check for related Technical Service Bulletin(s) repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to available repair information. If vehicle is not repaired, go to the next step.
2		No	Go to next step.
3	INSPECT THROTTLE BODY CONNECTOR Turn the ignition switch off. Verify that the throttle body connector is connected securely. Is the connector normal?	Yes	Go to the next step.
3		No	Connect the connector securely, then go to Step 10.
4	INSPECT THROTTLE BODY CONNECTION FOR POOR CONNECTION Disconnect the throttle body 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 10.
4		No	Go to the next step.
5	INSPECT TP SENSOR Inspect the TP sensor. (See THROTTLE POSITION (TP) SENSOR INSPECTION ) Is the TP sensor okay?	Yes	Go to the next step.
5		No	Replace the throttle body, then go to Step 10.
6	INSPECT TP1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY Turn the ignition switch to the ON position (Engine off). Measure the voltage between throttle body terminal A (wiring harness-side) and body ground. Is the voltage above 4.9 V?	Yes	Repair or replace short to power supply. Then, go to Step 10.
6		No	Go to the next step.
7	VERIFY TP SIGNAL CIRCUIT FOR SHORT TO CONSTANT VOLTAGE CIRCUIT Inspect for continuity between throttle body terminals A and B (wiring harness-side). Is there continuity?	Yes	Repair or replace suspected harness, then go to Step 10.
7		No	Go to the next step.
8	INSPECT PCM CONNECTOR FOR POOR CONNECTION 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 10.
8		No	Go to the next step.
9	VERIFY TP SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT Inspect for continuity between throttle body connector terminal D (wiring harness-side) and PCM connector terminal 2M (wiring harness-side). Is there continuity?	Yes	Repair or replace open circuit between TP sensor connector terminal A (wiring harness-side) and PCM connector terminal 2M (wiring harness-side). Then, go to the step.
9		No	Go to the next step.
10	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. Start the engine and warm it up completely. Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION .)
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE ) Is any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE )
11		No	Troubleshooting completed.