Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.

STEP	INSPECTION		ACTION
1	IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA Is DTC P0131:00 or P0151:00 on FREEZE FRAME DATA?	Yes	Go to the next step.
1		No	Go to troubleshooting procedures for DTC on FREEZE FRAME DATA. (See DTC TABLE .)
2	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
2		No	Record FREEZE FRAME DATA on the repair order, then go to the next step.
3	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line repair information availability. Is any related Service Bulletins available?	Yes	Perform repair or diagnosis according to the available Service Bulletins. If the vehicle is not repaired, go to the next step.
3		No	Go to the next step.
4	VERIFY RELATED PENDING OR STORED DTC Switch the ignition to off, then to ON (engine off). Verify the pending code or stored DTCs using the M-MDS. Is other DTC present?	Yes	Go to the appropriate DTC troubleshooting procedures. (See DTC TABLE .)
4		No	Go to the next step.
5	INSPECT A/F SENSOR CONNECTOR FOR POOR CONNECTION Switch the ignition to off. Disconnect the suspect A/F 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 10.
5		No	Go to the next step.
6	INSPECT A/F SENSOR CIRCUIT FOR SHORT TO GROUND Suspect A/F sensor connector is disconnected. Switch the ignition to off. Inspect for continuity between the following terminals (wiring harness-side) and body ground: P0131:00: A/F sensor (RH) terminal F A/F sensor (RH) terminal H P0151:00: A/F sensor (LH) terminal F A/F sensor (LH) terminal H Is there continuity?	Yes	If the short to ground circuit could be detected: Repair or replace the wiring harness for a possible short to ground. If the short to ground circuit could not be detected: Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION .) Go to Step 10.
6		No	Go to the next step.
7	INSPECT PCM CONNECTOR FOR POOR CONNECTION Suspect A/F sensor connector is disconnected. Switch the ignition to 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 10.
7		No	Go to the next step.
8	INSPECT A/F SENSOR CIRCUIT FOR OPEN CIRCUIT Suspect A/F sensor and PCM connectors are disconnected. Switch the ignition to off. Inspect for continuity between the following terminals (wiring harness-side): P0131:00: A/F sensor (RH) terminal F-PCM terminal 2AG A/F sensor (RH) terminal H-PCM terminal 2AC P0151:00: A/F sensor (LH) terminal F-PCM terminal 2AK A/F sensor (LH) terminal H-PCM terminal 2AE Is there continuity?	Yes	Go to the next step.
8		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 10.
9	INSPECT A/F SENSOR Reconnect all disconnected connectors. Inspect the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION .) Is there any malfunction?	Yes	Replace the A/F sensor, then go to the next step. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION .)
9		No	Go to the next step.
10	VERIFY TROUBLESHOOTING OF DTC P0131:00, P0151:00 HAS BEEN COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the PCM memory using the M-MDS. Perform the KOER self-test. (See KOEO/KOER SELF TEST .) Is the PENDING CODE for this DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION .) Go to the next step.
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
11		No	Troubleshooting completed.