Toyota Tacoma (2015-2018) Service Manual: System Description

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:

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.

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.