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	Throttle actuator control relay circuit check Remove throttle actuator control relay with ignition switch turned OFF. Check for proper terminal connection to throttle actuator control relay and ECM connectors. If connections are OK, turn ignition switch to ON position. Check that circuit voltage of throttle actuator control relay (coil side and switch side) power supply circuit is battery voltage. Is it in good condition?	Go to Step 3.	Repair or replace power supply circuit of throttle actuator control relay (coil side and/or switch side).
3	Throttle actuator control relay check Check throttle actuator control relay for operation referring to ENGINE AND EMISSION CONTROL SYSTEM RELAY INSPECTION . Is it in good condition?	Go to Step 4.	Replace throttle actuator control relay.
4	Wire harness check Disconnect connectors from ECM with ignition switch turned OFF. Check that throttle actuator control relay (coil side and switch side) circuit is as follows. Wiring harness resistance of throttle actuator control relay (coil side and switch side) control circuit is less than 3Ω Insulation resistance between throttle actuator control relay (coil side and switch side) control circuit and vehicle body ground is Infinity Insulation resistance of wire harness is infinity between throttle actuator control relay (coil side) terminal and each other terminal at throttle actuator control relay connector Circuit voltage of throttle actuator control relay (coil side and switch side) control circuit is 0 - 1 V with ignition switch turned ON Are they in good condition?	Substitute a known-good ECM and recheck.	Repair or replace control circuit of throttle actuator control relay (coil side and/or switch side) is open, short or high resistance.