Diagnostic Procedure

STEP	INSPECTION		ACTION
1	INSPECT AIR MIX ACTUATOR CONNECTOR Switch the ignition to off. Disconnect the negative battery cable. Disconnect the air mix actuator connector. Inspect the connector and terminals (corrosion, damage, pin disconnection). Are the connector and terminals normal?	Yes	Go to the next step.
1		No	Repair/replace the connector or terminal. After repair procedure, go to the next step.
2	INSPECT AIR MIX ACTUATOR Inspect the air mix actuator. (See AIR MIX ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Is it normal?	Yes	Go to the next step.
2		No	Replace the air mix actuator. (See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) Go to the next step.
3	INSPECT AIR MIX ACTUATOR (POTENTIOMETER) CIRCUIT FOR OPEN Disconnect the climate control unit connector and the air mix actuator connector. Is there an open circuit in the wiring harness between the following terminals of the climate control unit and the air mix actuator? 2L-A 2K-C 1V-B	Yes	Repair the wiring harness. Go to the next step.
3		No	Go to the next step.
4	INSPECT AIR MIX ACTUATOR (POTENTIOMETER) SHORT TO GROUND Inspect for continuity between air mix actuator connector terminal C and body ground. Is there continuity?	Yes	Repair/replace the malfunctioning vehicle wiring harness. After repair procedure, go to the next step.
4		No	The system is normal at present. Go to the next step.
5	VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION Inspect the connector and terminals (corrosion, damage, pin disconnection). Are the connector and terminals normal?	Yes	Go to the next step.
5		No	Repair/replace the malfunctioning vehicle wiring harness, connector, or terminal. After repair procedure, go to the next step.
6	VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN Reconnect the disconnected connectors. Connect the negative battery cable. Switch the ignition to ON. Clear the DTC for the climate control unit using the M-MDS. (See CLEARING DTC [FULL-AUTO AIR CONDITIONER] .) Perform the DTC inspection for the climate control unit using the M-MDS. (See DTC DISPLAY [FULL-AUTO AIR CONDITIONER] .) Is the same DTCs present?	Yes	Repeat the inspection from Step 1. If the malfunction does not recur, go to the next step. If the malfunction recurs, replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) Go to the next step.
6		No	Go to the next step.
7	VERIFY THAT NO OTHER DTCs ARE PRESENT Verify other DTCs displayed. Are any other DTCs output?	Yes	Perform the corresponding DTC inspection.
7		No	DTC troubleshooting completed.