DTC B1081:71, B1082:71 [FULL-AUTO AIR CONDITIONER]

id0702c1816500

Note

• DTC B1081:71, B1082:71 will be detected when the ignition switch is turned to the ON position and approx. 30 s have passed since the air mix actuator is operated.

L.H.D.

DTC B1081:71

Driver-side air mix actuator motor lock

DTC B1082:71

Passenger-side air mix actuator motor lock

DETECTION CONDITION

CPU detects malfunction in air mix actuator system

POSSIBLE CAUSE

•  Air mix actuator malfunction

•  A/C unit (air mix link and air mix crank) malfunction

•  Connector or terminal malfunction

•  Open circuit in wiring harness between climate control unit connector terminal 1P and 1R (Driver-side)

•  Open or short circuit in wiring harness between climate control unit connector terminal 1O and 1Q (Passenger-side)

•  Short to ground in wiring harness between climate control unit connector terminal 1P and 1R (Driver-side)

•  Short to ground in wiring harness between climate control unit connector terminal 1O and 1Q (Passenger-side).

DTC B1081:71	Driver-side air mix actuator motor lock
DETECTION CONDITION	CPU detects malfunction in air mix actuator system
POSSIBLE CAUSE	• Air mix actuator malfunction • A/C unit (air mix link and air mix crank) malfunction • Connector or terminal malfunction • Open circuit in wiring harness between climate control unit connector terminal 1P and 1R (Driver-side) • Open or short circuit in wiring harness between climate control unit connector terminal 1O and 1Q (Passenger-side) • Short to ground in wiring harness between climate control unit connector terminal 1P and 1R (Driver-side) • Short to ground in wiring harness between climate control unit connector terminal 1O and 1Q (Passenger-side).

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT AIR MIX ACTUATOR OPERATION • Disconnect the air mix actuator connector. • Apply battery positive voltage and connect the ground to the air mix actuator connector terminals B and C, and then inspect the air mix actuator. • Does the air mix actuator operate?	Yes	Connect the connector, then go to Step 3.
1		No	Go to the next step.
2	INSPECT AIR MIX LINK OPERATION • Remove the air mix actuator. • Operate the air mix link manually. • Does the air mix link operate smoothly?	Yes	Replace the air mix actuator. (See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
2		No	Replace the air mix link and the air mix crank.
3	INSPECT AIR MIX ACTUATOR CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND • Disconnect the climate control unit connector. • Apply battery positive voltage and connect the ground to the climate control unit terminal 1P and 1R, and then inspect the air mix actuator. (Driver-side) • Apply battery positive voltage and connect the ground to the climate control unit terminal 1O and 1Q, and then inspect the air mix actuator. (Passenger-side) • Does the air mix actuator operate?	Yes	Inspect the connection of the climate control unit connector.
3		No	Repair the wiring harness.

R.H.D.

DTC B1081:71

Passenger-side air mix actuator motor lock

DTC B1082:71

Driver-side air mix actuator motor lock

DETECTION CONDITION

CPU detects malfunction in air mix actuator system

POSSIBLE CAUSE

•  Air mix actuator malfunction

•  A/C unit (air mix link and air mix crank) malfunction

•  Connector or terminal malfunction

•  Open circuit in wiring harness between climate control unit connector terminal 1P and 1R (Driver-side)

•  Open or short circuit in wiring harness between climate control unit connector terminal 1O and 1Q (Passenger-side)

•  Short to ground in wiring harness between climate control unit connector terminal 1P and 1R (Driver-side)

•  Short to ground in wiring harness between climate control unit connector terminal 1O and 1Q (Passenger-side).

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT AIR MIX ACTUATOR OPERATION • Disconnect the air mix actuator connector. • Apply battery positive voltage and connect the ground to the air mix actuator connector terminals B and C, and then inspect the air mix actuator. • Does the air mix actuator operate?	Yes	Connect the connector, then go to Step 3.
1		No	Go to the next step.
2	INSPECT AIR MIX LINK OPERATION • Remove the air mix actuator. • Operate the air mix link manually. • Does the air mix link operate smoothly?	Yes	Replace the air mix actuator. (See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
2		No	Replace the air mix link and the air mix crank.
3	INSPECT AIR MIX ACTUATOR CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND • Disconnect the climate control unit connector. • Apply battery positive voltage and connect the ground to the climate control unit terminal 1P and 1R, and then inspect the air mix actuator. (Driver-side) • Apply battery positive voltage and connect the ground to the climate control unit terminal 1O and 1Q, and then inspect the air mix actuator. (Passenger-side) • Does the air mix actuator operate?	Yes	Inspect the connection of the climate control unit connector.
3		No	Repair the wiring harness.

DTC B1081:71	Driver-side air mix actuator motor lock
DTC B1082:71	Passenger-side air mix actuator motor lock
DETECTION CONDITION	CPU detects malfunction in air mix actuator system
POSSIBLE CAUSE	• Air mix actuator malfunction • A/C unit (air mix link and air mix crank) malfunction • Connector or terminal malfunction • Open circuit in wiring harness between climate control unit connector terminal 1P and 1R (Driver-side) • Open or short circuit in wiring harness between climate control unit connector terminal 1O and 1Q (Passenger-side) • Short to ground in wiring harness between climate control unit connector terminal 1P and 1R (Driver-side) • Short to ground in wiring harness between climate control unit connector terminal 1O and 1Q (Passenger-side).