HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) > Auto A/C Control Module I/O Signal

ELECTRICAL SPECIFICATION

Terminal No.

Remarks

Measuring condition

Standard

B9

Mode door actuator power supply

Switch the outlet opening to VENT → DEF.

*2

B8

Switch the outlet opening to DEF → VENT.

B7

Air mix door actuator power supply

Switching the air mix door from COOL → HOT

*1

B6

Switching the air mix door from HOT → COOL

B5

Ignition power supply

Ignition switch: ON

Battery voltage

B4

Battery power supply

Ignition switch: OFF, ACC, ON

Battery voltage

B3

Sunload sensor

Ignition switch: ON, With Normal Sunload (No sunload: 5 V)

3 V

B2

Evaporator sensor

Ignition switch: ON

5 V or less

B1

Air mix door actuator PBR signal

Air mix door: COOL position

0.5 V

Air mix door: HOT position

4.5 V

B20

Intake door actuator signal

Inlet opening: FRESH (Other positions: 12 V)

0 V

B19

Inlet opening: MIX (Other positions: 12 V)

0 V

B18

Inlet opening: RECIRC (Other positions: 12 V)

0 V

B17

A/C ON signal

A/C: ON (A/C OFF: 0 V)

8 — 10 V

B16

Blower motor control

*3

*3

B15

Blower fan ON signal

When blower fan is rotating (Not rotating: 12 V)

0 V

B13

Engine coolant temperature

When the engine coolant temperature is 49°C (120°F)

8.9 V

B12

In-vehicle sensor

—

—

B11

Ground

Continuity to chassis ground

0 Ω

A7

Air mix door actuator PBR specified voltage

Ignition switch: ON

5 V

A5

Mode door actuator position detection signal

Outlet opening

BI-LEVEL, DEF

5 V

VENT, HEAT, DEF/HEAT

0 V

A4

Mode door actuator position detection signal

Outlet opening

HEAT, DEF/HEAT, DEF

5 V

VENT, BI-LEVEL

0 V

A1

Illumination power supply

Ignition switch: ON, Light switch: ON

Battery voltage

Ignition switch: ON, Light switch: OFF

0 V

A16

Sensor ground

Continuity to chassis ground

0 Ω

A14

Combination meter (Ambient temperature signal)

*3

*3

A13

Mode door actuator position detection signal

Outlet opening

VENT, BI-LEVEL, HEAT

5 V

DEF/HEAT, DEF

0 V

A12

Mode door actuator position detection signal

Outlet opening

VENT, DEF/HEAT

5 V

BI-LEVEL, HEAT, DEF

0 V

A10

A/C cut signal

A/C: ON

Battery voltage

When pressure SW is operating

0 V

A9

Illumination ground

Continuity to chassis ground

0 Ω

*1: Shows the battery voltage while the motor is running. When stopped, it will output 0 V, or the pulse signals of the battery voltage.

*2: Shows the battery voltage while the motor is running. When stopped, it shows 0 V.

*3: Unable to measure the voltage because it is a pulse signal.