DTC Troubleshooting

WARNING: This page is about a different car, the 2006 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.

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 leak detection pump operation check Check operating sound of EVAP leak detection pump referring to "EVAP Leak Detecting Pump Circuit Check" under EVAP LEAK CHECK MODULE AND ITS CIRCUIT INSPECTION . Is operating sound heard?	Go to Step 4.	Go to Step 3.
3	Wire harness check Disconnect connectors from EVAP leak check module and ECM with ignition switch turned OFF. Check for proper terminal connection to EVAP leak check module and ECM connectors. If connections are OK, check that EVAP leak detection pump circuit is as follows. Wiring harness resistance of each EVAP leak detection pump control circuit and ground circuit is less than 3 Ω Insulation resistance of EVAP leak detection pump control circuit is infinity between EVAP leak check module connector and vehicle body ground Insulation resistance of wire harness is infinity between EVAP leak detection pump control terminal and each other terminal at EVAP leak check module connector. Circuit voltage of EVAP leak detection pump control circuit is 0 - 1 V with ignition switch turned ON Are they in good condition?	Go to Step 4.	Control and ground circuits of EVAP leak detecting pump are open, short and/or high resistance.
4	EVAP leak detecting pump check Check EVAP leak detecting pump for operation referring to "EVAP Leak Detecting Pump Check" under EVAP LEAK CHECK MODULE INSPECTION . Is it in good condition?	Substitute a known-good ECM and recheck.	Replace EVAP leak check module.