Diagnostic Procedure

DTC P0122 DIAGNOSTIC PROCEDURE TABLE

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 REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins 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.
2		No	Go to the next step.
3	CLASSIFY TP SENSOR NO.1 OR WIRING HARNESS MALFUNCTION Connect the WDS or equivalent. Access TP1 PID. Disconnect throttle body connector. Connect a jumper wire between throttle body terminals E and F (wiring harness-side). Is the voltage above 4.9 V ?	Yes	Go to the next step.
3		No	Go to Step 5.
4	INSPECT TP SENSOR NO.1 Inspect the TP sensor No.1. (See THROTTLE POSITION (TP) SENSOR INSPECTION .) Is TP sensor No.1 okay?	Yes	Inspect throttle body terminal E for poor connection. Repair or replace if necessary, then go to Step 8.
4		No	Replace the throttle body, then go to Step 8. (See INTAKE AIR SYSTEM REMOVAL/INSTALLATION .)
5	INSPECT POWER SUPPLY CIRCUIT VOLTAGE AT THROTTLE BODY CONNECTOR Turn the ignition switch to the ON position (Engine off). Measure the voltage at throttle body terminal E (wiring harness-side). Is the voltage within 4.5-5.5 V ?	Yes	Go to the next step.
5		No	Repair or replace for an open circuit between throttle body terminal E (wiring harness-side) and PCM terminal 2AO (wiring harness-side). Then go to Step 8.
6	VERIFY TP SENSOR NO.1 SIGNAL CIRCUIT FOR OPEN CIRCUIT Turn the ignition switch off. Inspect for continuity between throttle body terminal F (wiring harness-side) and PCM terminal 2AK (wiring harness-side). Is there continuity?	Yes	Go to the next step.
6		No	Repair or replace the wiring harness, then go to Step 8.
7	VERIFY TP SENSOR NO.1 SIGNAL CIRCUIT FOR SHORT TO GROUND Inspect for continuity between throttle body terminal F (wiring harness-side) and body ground. Is there continuity?	Yes	Repair or replace the wiring harness, then go to the next step.
7		No	Go to the next step.
8	VERIFY TROUBLESHOOTING OF DTC P0122 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 .)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE .) Is any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
9		No	Troubleshooting completed.