Diagnostic procedure

DTC P0511 - 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 REPAIR INFORMATION AVAILABILITY Verify related service 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	INSPECT POOR CONNECTION OF IAC VALVE CONNECTOR Turn the ignition switch off. Disconnect IAC valve 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 9.
3		No	Go to the next step.
4	INSPECT IAC VALVE ELECTRICAL MALFUNCTION Inspect the IAC valve. (See IDLE AIR CONTROL (IAC) VALVE INSPECTION ) Is IAC valve normal?	Yes	Go to the next step.
4		No	Replace IAC valve, then go to Step 9.
5	INSPECT CONTROL CIRCUIT FOR SHORT TO POWER Turn the ignition switch to the ON position (Engine off). Measure voltage between IAC valve terminal B (wiring harness-side) and body ground: Is the voltage B+ ?	Yes	Repair or replace wiring harness, then go to Step 9.
5		No	Go to the next step.
6	INSPECT CONTROL CIRCUIT FOR SHORT TO GROUND Turn the ignition switch off. Inspect for continuity between following terminals (wiring harness-side) and body ground: IAC valve terminal A IAC valve terminal B Is there continuity?	Yes	Repair or replace the wiring harness, then go to Step 9.
6		No	Go to the next step.
7	INSPECT POOR CONNECTION OF PCM CONNECTOR 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 the terminal, then go to Step 9.
7		No	Go to the next step.
8	INSPECT CONTROL CIRCUIT MALFUNCTION FOR OPEN CIRCUIT Inspect for continuity following terminals (wiring harness-side): Between IAC valve terminal A and main relay terminal 87 Between IAC valve terminal B and PCM terminal 88 Is there continuity?	Yes	Repair or replace the wiring harness, then go to the next step.
8		No	Go to the next step.
9	VERIFY TROUBLESHOOTING OF DTC P0511 COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC using the WDS or equivalent. Start the engine. Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION .)
9		No	Go to the next step.
10	VERIFY AFTER SERVICE PRECAUTION Perform the "AFTER SERVICE PRECAUTION". (See AFTER REPAIR PROCEDURE .) Are any DTC present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE .)
10		No	Troubleshooting completed.