Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Air Inlet Damper Control Servo Motor Circuit (B1442/42)

DESCRIPTION

This No. 1 air conditioning servo assembly (fresh/recirculation damper) is controlled by the air conditioning amplifier assembly and moves the air inlet damper to the desired position.

DTC No.

DTC Detection Condition

Trouble Area

B1442/42

Air inlet damper position sensor value does not change even if air conditioning amplifier assembly operates air inlet damper servo motor.

  • No. 1 air conditioning servo assembly (fresh/recirculation damper)
  • Harness or connector
  • Air conditioning amplifier assembly

WIRING DIAGRAM

PROCEDURE

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Operate the recirculation/fresh 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 Inlet Damper Position

Air inlet damper servo motor actual position /

Air inlet damper servo motor actual position / Min.: -14.0%

Max.: 113.5%

FRESH: 0.0%

RECIRCULATION: 100.0%

-

Air Inlet Damper Target

Air inlet damper servo motor target position /

Min.: -14.0%

Max.: 113.5%

FRESH: 0.0%

RECIRCULATION: 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

B

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

A

2.

INSPECT NO. 1 AIR CONDITIONING SERVO ASSEMBLY (FRESH/RECIRCULATION DAMPER)

(a) Remove the No. 1 air conditioning servo assembly (fresh/recirculation damper) (See page (b) Inspect the No. 1 air conditioning servo assembly (fresh/recirculation damper) ).

(b) Inspect the No. 1 air conditioning servo assembly (fresh/recirculation damper) (See page ).

NG

REPLACE NO. 1 AIR CONDITIONING SERVO ASSEMBLY (FRESH/RECIRCULATION DAMPER)

OK

3.

CHECK HARNESS AND CONNECTOR (NO. 1 AIR CONDITIONING SERVO ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the D29 No. 1 air conditioning servo assembly (fresh/recirculation damper).

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

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D29-6 (MREC) - A35-26 (AIR)

Always

Below 1 Ω

D29-7 (MFRS) - A35-25 (AIF)

Always

Below 1 Ω

D29-6 (MREC) or A35-26 (AIR) - Body ground

Always

10 kΩ or higher

D29-7 (MFRS) or A35-25 (AIF) - Body ground

Always

10 kΩ or higher

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Air Mix Damper Position Sensor Circuit (Driver Side) (B1436/36)
DESCRIPTION This sensor detects the position of the air mix damper (for driver side) and sends the appropriate signals to the air conditioning amplifier assembly. The position sensor is built int ...

Room Temperature Sensor Circuit (B1411/11)
DESCRIPTION The cooler thermistor (room temperature sensor) is installed in the instrument panel to detect the cabin temperature which is used to control the air conditioning system AUTO mode. Th ...

Other materials:

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Charging System DTC Code Detection Item Warning Indicate Memory SAE See page P161A87 Lost Communication with Alternator Missing Message - DTC stored ...

Voice Guidance does not Function
PROCEDURE 1. CHECK VOICE GUIDANCE SETTING (a) Check that the voice guidance settings are not off. OK: Voice guidance settings are not off. NG CHANGE VOICE GUIDANCE SETTINGS TO ON OK ...

Brake System (P157800)
DESCRIPTION This DTC is output when the VSC system has a problem. Check the VSC system when this DTC is output. DTC No. DTC Detection Condition Trouble Area MIL Note P157800 Diagnosis Condition: Cr ...

© 2011-2022 Copyright www.ttguide.net