Components

A11

A12

A13

A15

A16

A17

A18

A19

C20

C21-1

C21-2

C21-3

C22-1

C22-2

C23-2

C23-4

C230-1

E03

E04

E05

E07

M04

M05

M13-3

M32-1

M32-2

M38

Connectors

EM01

EM02

E/R-B

E/R-C

E/R-D

E/R-F

I/P-J

I/P-L

MA01

MA02

MC01

MC20

Grounds

G05

G06

G08

Mode actuator

Thermostatic switch

Temperature actuator

Power transistor

Intake actuator

High blower relay

Blower relay

Blower motor

A/C Compressor (V6)

PCM (I4 with A/T)

PCM (I4 with A/T)

PCM (I4 with A/T)

ECM (I4 with M/T)

ECM (I4 with M/T)

ECM (V6)

ECM (V6)

ECM (Diesel)

AQS sensor (Diesel)

Ambient temperature sensor

A/C Compressor (I4)

Triple switch

Joint connector

Joint connector

ETACM

A/C control module

A/C Control module

Photo sensor

Location reference-page

Circuit Description

The A/C control module receives input signals(for instance, photo sensor,ambient temperature sensor, etc) and controls the operation of air conditioning system. The A/C control module and various sensor signals provide accurate control of air mixture using mode actuator, temperature actuator and intake actuator under all operating conditions.

The blower motor runs at the highest speed when the high blower relay coil energized through A/C control module.

With the A/C switch ON, the engine control module(ECM) will ground the coil of the A/C control relay after a short delay to adjust idle speed.

The function of the power transistor is that of the blower resister in manual A/C. The power transistor is controlled by the input currents applied to the power transistor BASE terminal.