DTC 19

id070200803200

DTC 19

Air mix actuator (potentiometer) system inspection

POSSIBLE CAUSE

•  Air mix actuator malfunction •  Open circuit in wiring harness between A/C amplifier connector terminal 2P and air mix actuator connector terminal C (L.H.D.), A (R.H.D.) •  Open circuit in wiring harness between A/C amplifier connector terminal 2D and air mix actuator connector terminal E •  Open circuit in wiring harness between A/C amplifier connector terminal 2N and air mix actuator connector terminal A (L.H.D.), C (R.H.D.) •  Short to ground in wiring harness between A/C amplifier connector terminal 2D and air mix actuator connector terminal E

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	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.
		No	Replace the air mix actuator. (See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
2	INSPECT AIR MIX ACTUATOR (POTENTIOMETER) CIRCUIT FOR OPEN CIRCUIT •  Disconnect the A/C amplifier connector (16-pin) and the air mix actuator connector. •  Is there an open circuit in the wiring harness between the following terminals of the A/C amplifier connector (16-pin) and the air mix actuator connector? ―  2P—C (L.H.D.), A (R.H.D.) ―  2D—E ―  2N—A (L.H.D.), C (R.H.D.)	Yes	Repair the wiring harness.
		No	Go to the next step.
3	INSPECT AIR MIX ACTUATOR (POTENTIOMETER) CIRCUIT FOR SHORT TO GROUND •  Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2D and air mix actuator connector terminal E?	Yes	Repair the wiring harness.
		No	The system is normal at present. (Clear the past malfunction from memory.)