Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: System Description

SYSTEM DESCRIPTION

1. GENERAL

(a) The air conditioning system has the following controls.

Control

Outline

Manual Control

The air conditioner amplifier assembly controls the damper positions (air inlet control damper, air mix control damper and mode control damper) and blower speed in accordance with the positions of the switches (temperature control dial, blower dial, mode select dial and air inlet control switch).

Air Inlet Control

Drives the air inlet servo motor (damper servo sub-assembly) according to the operation of the air inlet control switch and moves the dampers to the fresh or recirculation position.

Compressor Control

Controls the compressor with magnet clutch assembly to turn on or off based on the signals from various sensors.

MAX Air Conditioning Control

When the temperature control dial is turned to the MAX A/C position, the air conditioner amplifier assembly performs the following control to improve cooling efficiency:

  • Turns the compressor with magnet clutch assembly on.
  • Activates the air inlet servo motor (damper servo sub-assembly) to set the air inlet control damper to the recirculation position.*

Diagnosis

A Diagnostic Trouble Code (DTC) is stored in the memory when the air conditioner amplifier assembly detects a problem with the air conditioning system.

  • *: for Double Cab

2. MODE POSITION AND DAMPER OPERATION

(a) Mode Position and Damper Operation

Functions of Main Dampers

Control Door

Operation Position

Door Position

Operation

Air Inlet Control Door

FRESH

A

Brings in fresh air.

RECIRCULATION

B

Recirculates internal air.

Air Mix Control Door

MAX COLD to MAX HOT Temperature Setting

C - D - E

(C' - D' - E')

Varies the mixture ratio of warm air and cool air in order to regulate the temperature continuously between hot and cold.

Mode Control Door

FACE

F, J, N

Air blows out of the front center register and side register.

BI-LEVEL

G, L, N

Air blows out of the front center register, side register and front and rear footwell register ducts*.

FOOT

H, M, O

Air blows out of the front and rear footwell register ducts*. In addition, air blows out slightly from the front and rear center register*, side register and defroster.

FOOT AND DEFROSTER

H, M, P

Defrosts the windshield through the center defroster, side defroster, side register, front and rear center register ducts*, while air is also blown out from the front and rear footwell register ducts*.

DEFROSTER

I, J, Q

Defrosts the windshield through the center defroster, side defroster.

  • *: for Double Cab

3. AIR OUTLETS AND AIRFLOW VOLUME

(a) Air Outlets and Airflow Volume

HINT:

HINT:

The size of each circle ○ indicates the ratio of airflow volume.

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the air conditioning system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUG ...

System Diagram
SYSTEM DIAGRAM ...

Other materials:

Removal
REMOVAL PROCEDURE 1. REMOVE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY (See page ) 2. REMOVE NO. 1 RADIATOR HOSE 3. REMOVE NO. 2 RADIATOR HOSE 4. DISCONNECT RADIATOR RESERVE TANK HOSE 5. SEPARATE TRANSMISSION OIL COOLER HOSE (for Automatic Transmission) (a) Disengage the c ...

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedures to troubleshoot the cruise control system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT ...

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT DRIVER SEAT BELT WARNING LIGHT HINT: The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat. (a) Turn the ignition switch to ON. (b) When the driver seat belt is not fastened, check th ...

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