DTC B1C1A:11, B1C1A:13, B1C1B:11, B1C1B:13 [FULL-AUTO AIR CONDITIONER]

id0702c1817500

L.H.D.

DTC B1C1A:11

Driver-side air mix actuator (potentiometer) circuit short to ground

DTC B1C1A:13

Driver-side air mix actuator (potentiometer) circuit open

DTC B1C1B:11

Passenger-side air mix actuator (potentiometer) circuit short to ground

DTC B1C1B:13

Passenger-side air mix actuator (potentiometer) circuit open

DETECTION CONDITION

CPU detects malfunction in air mix actuator (potentiometer) circuit

POSSIBLE CAUSE

•  Air mix actuator malfunction

•  Open circuit in wiring harness between climate control unit connector terminal 2K and air mix actuator connector terminal G (Driver-side)

•  Open circuit in wiring harness between climate control unit connector terminal 2C and air mix actuator connector terminal F (Driver-side)

•  Open circuit in wiring harness between climate control unit connector terminal 2L and air mix actuator connector terminal E (Driver-side)

•  Open circuit in wiring harness between climate control unit connector terminal 2K and air mix actuator connector terminal E (Passenger-side)

•  Open circuit in wiring harness between climate control unit connector terminal 2A and air mix actuator connector terminal F (Passenger-side)

•  Open circuit in wiring harness between climate control unit connector terminal 2L and air mix actuator connector terminal G (Passenger-side)

•  Short to ground in wiring harness between climate control unit connector terminal 2C and air mix actuator connector terminal F (Driver-side)

•  Short to ground in wiring harness between climate control unit connector terminal 2A and air mix actuator connector terminal F (Passenger-side)

DTC B1C1A:11	Driver-side air mix actuator (potentiometer) circuit short to ground
DETECTION CONDITION	CPU detects malfunction in air mix actuator (potentiometer) circuit
POSSIBLE CAUSE	• Air mix actuator malfunction • Open circuit in wiring harness between climate control unit connector terminal 2K and air mix actuator connector terminal G (Driver-side) • Open circuit in wiring harness between climate control unit connector terminal 2C and air mix actuator connector terminal F (Driver-side) • Open circuit in wiring harness between climate control unit connector terminal 2L and air mix actuator connector terminal E (Driver-side) • Open circuit in wiring harness between climate control unit connector terminal 2K and air mix actuator connector terminal E (Passenger-side) • Open circuit in wiring harness between climate control unit connector terminal 2A and air mix actuator connector terminal F (Passenger-side) • Open circuit in wiring harness between climate control unit connector terminal 2L and air mix actuator connector terminal G (Passenger-side) • Short to ground in wiring harness between climate control unit connector terminal 2C and air mix actuator connector terminal F (Driver-side) • Short to ground in wiring harness between climate control unit connector terminal 2A and air mix actuator connector terminal F (Passenger-side)

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.
1		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 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? Driver-side ― 2K—G ― 2C—F ― 2L—E Passenger-side ― 2K—E ― 2A—F ― 2L—G	Yes	Repair the wiring harness.
2		No	Go to the next step.
3	INSPECT AIR MIX ACTUATOR (POTENTIOMETER) SHORT TO GROUND • Is there a short circuit to ground in the wiring harness between the following terminals of the climate control unit terminal and air mix actuator terminal? ― 2C—F (Driver-side) ― 2A—F (Passenger-side)	Yes	Repair the wiring harness.
3		No	The system is normal at present. (Clear the past malfunction from the memory.)

R.H.D.

DTC B1C1A:11

Passenger-side air mix actuator (potentiometer) circuit short to ground

DTC B1C1A:13

Passenger-side air mix actuator (potentiometer) circuit open

DTC B1C1B:11

Driver-side air mix actuator (potentiometer) circuit short to ground

DTC B1C1B:13

Driver-side air mix actuator (potentiometer) circuit open

DETECTION CONDITION

CPU detects malfunction in air mix actuator (potentiometer) circuit

POSSIBLE CAUSE

•  Air mix actuator malfunction

•  Open circuit in wiring harness between climate control unit connector terminal 2K and air mix actuator connector terminal E (Driver-side)

•  Open circuit in wiring harness between climate control unit connector terminal 2C and air mix actuator connector terminal F (Driver-side)

•  Open circuit in wiring harness between climate control unit connector terminal 2L and air mix actuator connector terminal G (Driver-side)

•  Open circuit in wiring harness between climate control unit connector terminal 2K and air mix actuator connector terminal G (Passenger-side)

•  Open circuit in wiring harness between climate control unit connector terminal 2A and air mix actuator connector terminal F (Passenger-side)

•  Open circuit in wiring harness between climate control unit connector terminal 2L and air mix actuator connector terminal E (Passenger-side)

•  Short to ground in wiring harness between climate control unit connector terminal 2C and air mix actuator connector terminal F (Driver-side)

•  Short to ground in wiring harness between climate control unit connector terminal 2A and air mix actuator connector terminal F (Passenger-side)

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.
1		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 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? Driver-side ― 2K—E ― 2C—F ― 2L—G Passenger-side ― 2K—G ― 2A—F ― 2L—E	Yes	Repair the wiring harness.
2		No	Go to the next step.
3	INSPECT AIR MIX ACTUATOR (POTENTIOMETER) SHORT TO GROUND • Is there a short circuit to ground in the wiring harness between the following terminals of the climate control unit terminal and air mix actuator terminal? ― 2C—F (Driver-side) ― 2A—F (Passenger-side)	Yes	Repair the wiring harness.
3		No	The system is normal at present. (Clear the past malfunction from the memory.)

DTC B1C1A:11	Driver-side air mix actuator (potentiometer) circuit short to ground
DTC B1C1A:13	Driver-side air mix actuator (potentiometer) circuit open
DTC B1C1B:11	Passenger-side air mix actuator (potentiometer) circuit short to ground
DTC B1C1B:13	Passenger-side air mix actuator (potentiometer) circuit open
DETECTION CONDITION	CPU detects malfunction in air mix actuator (potentiometer) circuit
POSSIBLE CAUSE	• Air mix actuator malfunction • Open circuit in wiring harness between climate control unit connector terminal 2K and air mix actuator connector terminal G (Driver-side) • Open circuit in wiring harness between climate control unit connector terminal 2C and air mix actuator connector terminal F (Driver-side) • Open circuit in wiring harness between climate control unit connector terminal 2L and air mix actuator connector terminal E (Driver-side) • Open circuit in wiring harness between climate control unit connector terminal 2K and air mix actuator connector terminal E (Passenger-side) • Open circuit in wiring harness between climate control unit connector terminal 2A and air mix actuator connector terminal F (Passenger-side) • Open circuit in wiring harness between climate control unit connector terminal 2L and air mix actuator connector terminal G (Passenger-side) • Short to ground in wiring harness between climate control unit connector terminal 2C and air mix actuator connector terminal F (Driver-side) • Short to ground in wiring harness between climate control unit connector terminal 2A and air mix actuator connector terminal F (Passenger-side)