Toyota Tacoma (2015-2018) Service Manual: Air Outlet Damper Control Servo Motor Circuit (B1443/43)

Toyota Tacoma (2015-2018) Service Manual / Air Conditioning / Air Conditioning System(for Automatic Air Conditioning System) / Air Outlet Damper Control Servo Motor Circuit (B1443/43)

DESCRIPTION

This No. 1 air conditioning radiator damper servo sub-assembly (for mode switching) is controlled by the air conditioning amplifier assembly and moves the mode damper to the desired position.

DTC No.	DTC Detection Condition	Trouble Area
B1443/43	Mode damper position sensor value does not change even if air conditioning amplifier assembly operates mode damper servo motor.	No. 1 air conditioning radiator damper servo sub-assembly (for mode switching) Harness or connector Air conditioning amplifier assembly

WIRING DIAGRAM

PROCEDURE

1.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Operate the mode switch.

(e) Enter the following menus: Body Electrical / Air Conditioner / Data List.

(f) Check the value(s) by referring to the table below.

Air Conditioner

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Air Outlet Damper Position	Mode damper servo motor actual position / Min.: -14.0% Max.: 113.5%	FACE: 0.0% DEF: 100.0%	-
Air Outlet Damper Target	Mode damper servo motor target position / Min.: -14.0% Max.: 113.5%	FACE: 0.0% DEF: 100.0%	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Air Outlet Damper Position

Mode damper servo motor actual position /

Min.: -14.0%

Max.: 113.5%

FACE: 0.0%

DEF: 100.0%

Air Outlet Damper Target

Mode damper servo motor target position /

Min.: -14.0%

Max.: 113.5%

FACE: 0.0%

DEF: 100.0%

OK:

The display is as specified in the Normal Condition column.

Result	Proceed to
NG	A
OK (When troubleshooting according to Problem Symptoms Table)	B
OK (When troubleshooting according to the DTC)	C

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

2.	INSPECT NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (FOR MODE SWITCHING)

(a) Remove the No. 1 air conditioning radiator damper servo sub-assembly (for mode switching) (See page (b) Inspect the No. 1 air conditioning radiator damper servo sub-assembly (for ).

(b) Inspect the No. 1 air conditioning radiator damper servo sub-assembly (for mode switching) (See page ).

REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (FOR MODE SWITCHING)

3.	CHECK HARNESS AND CONNECTOR (NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the D32 No. 1 air conditioning radiator damper servo sub-assembly (for mode switching) connector.

(b) Disconnect the A35 air conditioning amplifier assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D32-6 (FACE) - A35-27 (AOF)	Always	Below 1 Ω
D32-7 (DEF) - A35-28 (AOD)	Always	Below 1 Ω
D32-6 (FACE) or A35-27 (AOF)	Always	10 kΩ or higher
D32-7 (DEF) or A35-28 (AOD)	Always	10 kΩ or higher

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

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