DTC 19


DTC 19	Air mix actuator (potentiometer) (past)
POSSIBLE CAUSE	• Air mix actuator malfunction • Climate control unit malfunction • Open circuit between air mix actuator and climate control unit • Short circuit between air mix actuator (terminal C) and climate control unit (terminal 1U: 24-pin)


STEP	INSPECTION		ACTION
1	• Inspect air mix actuator. • Is it okay?	Yes	Go to the next step.
1	• Inspect air mix actuator. • Is it okay?	No	Replace air mix actuator.
2	• Disconnect climate control unit connector (24-pin) and air mix actuator connector. • Is there open circuit between following terminals of climate control unit connector (24-pin) and air mix actuator connector? - 1B-A (L.H.D.) or B (R.H.D.) - 1U-C - 1I-B (L.H.D.) or A (R.H.D.)	Yes	Repair wiring harness.
2		No	Go to the next step.
3	• Is there short circuit to ground between terminal 1U of climate control unit connector (24-pin) and terminal C of air mix actuator connector?	Yes	Repair wiring harness.
3		No	This system is normal at present. (Erase the past failure from memory.)