DTC Troubleshooting

NOTE: Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to PRECAUTIONS FOR DTC TROUBLESHOOTING .

DTC TROUBLESHOOTING CHART

Step	Action	YES	NO
1	Was "Engine and Emission Control System Check" performed?	Go to Step 2.	Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
2	EVAP canister purge valve power supply voltage check Disconnect connector from EVAP canister purge valve with ignition switch turned OFF. Check for proper terminal connection to EVAP canister purge valve and ECM connectors. If connections are OK, check that EVAP canister purge valve power supply voltage is battery voltage between EVAP canister purge valve connector and vehicle body ground with ignition switch turned ON. Is it in good condition?	Go to Step 3.	Repair or replace EVAP canister purge valve power supply circuit.
3	Wire harness check Disconnect connector from ECM with ignition switch turned OFF. Check that EVAP canister purge valve circuit is as follows. Wiring harness resistance of EVAP canister purge valve control circuit is less than 3 Ω. Insulation resistance of EVAP canister purge valve control circuit is infinity between EVAP canister purge valve connector and vehicle body ground. Circuit voltage of EVAP canister purge valve control circuit is 0 - 1 V with ignition switch turned ON. Are they in good condition?	Go to Step 4.	Repair or replace defective wire harness.
4	EVAP canister purge valve check Check EVAP canister purge valve coil resistance referring to EVAP CANISTER PURGE VALVE INSPECTION . Is it in good condition?	Substitute a known-good ECM and recheck.	Replace EVAP canister purge valve.