DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step	Action	YES	NO
1	Was "4WD control system check" performed?	Go to Step 2.	Go to 4WD CONTROL SYSTEM CHECK .
2	Coupling air temperature sensor signal circuit and coupling air temperature sensor ground circuit check Disconnect "L14" and coupling air temperature sensor connectors with ignition mode of keyless push start system in "OFF". Check for proper terminal connection to "L14" and coupling air temperature sensor connectors. If connections are OK, check the following points. Resistance of "A1" and "A2" circuits: less than 1 Ω Resistance between "A1" circuit and ground: infinity Resistance between "A1" circuit terminal and other terminal at coupling air temperature sensor connector: infinity Voltage of "A1" circuit: 0 - 1 V (with ignition mode of keyless push start system in "ON") Are they in good condition?	Go to Step 3.	Repair or replace defective wire harness.
3	Coupling air temperature sensor check Check coupling air temperature sensor, see COUPLING AIR TEMPERATURE SENSOR INSPECTION . Is it in good condition?	Substitute a known-good 4WD control module and recheck DTC, see 4WD CONTROL MODULE REMOVAL AND INSTALLATION .	Replace coupling air temperature sensor, see COUPLING AIR TEMPERATURE SENSOR REMOVAL AND INSTALLATION .