ATC ECU (page 5 of 5)

AIR CONDITIONING

82-24

DESCRIPTION AND OPERATION

ATC ECU Harness Connector C1629 Pin Details

ATC ECU Harness Connector C1630 Pin Details

ATC ECU Harness Connector C2295 Pin Details

Pin No.

Description

System

Input/Output

Low

High

1

Ignition power supply

Yes

Yes

Input

2

Sunlight sensor ground

No

Yes

–

3

K bus

Yes

Yes

Input/Output

4

Delayed accessory power

Yes

Yes

Input

5

LH coolant valve

Yes

Yes

Output

6

RH coolant valve

No

Yes

Output

7

HRW relay

Yes

Yes

Output

8

Windscreen washer jet heater relay

Yes

Yes

Output

9

Auxiliary coolant pump

Yes

Yes

Output

10

Refrigerant pressure sensor signal

Yes

Yes

Input

11

Not used

–

–

–

12

Pollution sensor signal

No

Yes

Input

13

Pollution sensor power supply

No

Yes

Output

14

Windscreen heater relay

Yes

Yes

Output

15

LH seat heating temperature sensor

Yes

Yes

Output

16

RH seat heating temperature sensor

Yes

Yes

Output

17

Engine full load signal

Yes

Yes

Input

18

LH sunlight sensor signal

No

Yes

Input

19

RH sunlight sensor signal

No

Yes

Input

20

Refrigerant pressure sensor ground

Yes

Yes

–

21

Refrigerant pressure sensor power supply

Yes

Yes

Output

22

Coolant changeover valve

Yes

Yes

Output

23

Instrument illumination

Yes

Yes

Input

24

Sunlight sensor power supply

No

Yes

Output

25

Pollution sensor heater ground

No

Yes

–

26

Pollution sensor heater power supply

No

Yes

Output

Pin No.

Description

System

Input/Output

  

Low

High

 

1

Battery power supply

Yes

Yes

Input

2

A/C compressor clutch

Yes

Yes

Output

3

System ground

Yes

Yes

–

Pin No.

Description

System

Input/Output

Low

High

1

M bus power supply

No

Yes

Output

2

M bus ground

No

Yes

–

3

M bus interface line

No

Yes

Input/Output