Diagnostic procedure

DTC P0661 [L3] DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	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.
1		No	Go to the next step.
2	INSPECT VARIABLE INTAKE AIR SOLENOID VALVE CONNECTOR FOR POOR CONNECTION Turn the ignition switch off. Disconnect the variable intake air solenoid valve connector. Inspect for poor connection (damaged/pulled-out pins, corrosion, etc.). Is there malfunction?	Yes	Repair or replace the terminal, then go to Step 8.
2		No	Go to the next step.
3	INSPECT VARIABLE INTAKE AIR SOLENOID VALVE MALFUNCTION Inspect the variable intake air solenoid valve. (See VARIABLE INTAKE AIR SOLENOID VALVE INSPECTION .) Is the variable intake air solenoid valve normal?	Yes	Go to the next step.
3		No	Replace the variable intake air solenoid valve, then go to Step 8.
4	INSPECT VARIABLE INTAKE AIR SOLENOID VALVE POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT Variable intake air solenoid valve connector is disconnected. Turn the ignition switch to the ON position (Engine off). Measure the voltage between variable intake air solenoid valve terminal B (wiring-harness-side) and body ground. Is the voltage B+ ?	Yes	Go to the next step.
4		No	If the variable intake air solenoid valve related fuse. If the fuse is melt: Repair or replace the wiring harness for a possible short to ground. Replace the fuse. If the fuse is deterioration: Replace the fuse. If the fuse is normal: Repair or replace for a possible open circuit. Then go to Step 8.
5	INSPECT VARIABLE INTAKE AIR SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO GROUND Variable intake air solenoid valve connector is disconnected. Turn the ignition switch off. Inspect for continuity between variable intake air solenoid valve terminal A (wiring-harness-side) and body ground. Is there continuity?	Yes	If the short to ground circuit could be detected: Repair or replace for a possible short to ground. If the short to ground circuit could not be detected: Replace the PCM (short to ground in PCM internal circuit). (See PCM REMOVAL/INSTALLATION .) Then go to Step 8.
5		No	Go to the next step.
6	INSPECT PCM CONNECTOR FOR POOR CONNECTION Disconnect the PCM connector. Inspect for poor connection at terminal 2J. (damaged/pulled-out pins, corrosion, etc.). Is there any malfunction?	Yes	Repair the terminal, then go to Step 8.
6		No	Go to the next step.
7	INSPECT VARIABLE INTAKE AIR SOLENOID VALVE CONTROL CIRCUIT FOR OPEN Variable intake air solenoid valve and PCM connectors are disconnected. Inspect for continuity between variable intake air solenoid valve terminal A (wiring-harness-side) and PCM terminal 2J (wiring-harness-side). Is there continuity?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness for open circuit, then go to the next step.
8	VERIFY TROUBLESHOOTING OF DTC P0661 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 M-MDS. Perform the following procedures, or KOEO self-test with M-MDS. (See KOEO/KOER SELF TEST .) Access RPM PID. Increase the engine speed 4,600 rpm or more for 10 times. 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 troubleshooting. (See DTC TABLE .)
9		No	Troubleshooting completed.