Terminals Of

1. CHECK AIR CONDITIONING AMPLIFIER

w/o PTC Heater:

w/ PTC Heater:

8

7

6

S

4

3

2

1

16

15

14

13

12

11

10

g

12

11

10

9

8

7

6

5

4

3

2

1

24

23

22

21

20

19

18

17

16

15

14

13

8

7

6

5

4

3

2

1

16

15

14

13

12

11

10

Check from the rear of the connector while it is connected to the air conditioning amplifier.

Symbols (Terminals No.)

Wiring Color

Terminal Description

Condition

Specified Condition

S5-3 (E8-1) - GND (E8-12)

Y - W-B

Power supply for pressure sensor

Ignition switch: ON

4.5 to 5.5 V

TX+ (E8-2) - GND (E8-12)

V - W-B

CAN communication line

Ignition switch: ON

Pulse generation (see waveform 1)

TX- (E8-3) - GND (E8-12)

W - W-B

CAN communication line

Ignition switch: ON

Pulse generation (see waveform 2)

SG-2 (E8-4) - Body ground

L - Body ground

Ground for evaporator temperature sensor

Always

Below 1.0 Q

TAM (E8-5) - SG-1 (E8-11)

W - B

Ambient temperature sensor signal

Ignition switch: ON

Ambient temperature: 25 °C

1.35 to 1.75 V

PRE (E8-6) - SG-1 (E8-11)

GR - B

A/C pressure sensor signal

Refrigerant pressure: normal

0.76 to 4.74 V

PRE (E8-6) - SG-1 (E8-11)

GR - B

A/C pressure sensor signal

Refrigerant pressure: abnormal (less than 0.196 MPa [2.0 kgf/cm2] or more than 3.14 MPa [32 kgf/cm2])

Below 0.76 V or 4.74 V or more

SOL+ (E8-7) - GND (E8-12)

LG - W-B

A/C compressor operation signal

Engine idling Blower switch: 1 A/C switch: ON

Pulse generation (see waveform 3)

IG+ (E8-8) - GND (E8-12)

Y - W-B

Power source (IG)

Ignition switch: ON

11 to 14 V

SBLW (E8-9) - GND (E8-12)

BR - W-B

Blower motor ON signal

Ignition switch: ON Blower switch: 0 ^ 1

11 to 14 V ^ 0 V

TE (E8-10) - SG-2 (E8-4)

GR - L

Evaporator temperature sensor signal

Ignition switch: ON

Temperature near evaporator: 15°C (59°F)

1.0 to 1.3 V

SG-1 (E8-11) - Body ground

B - Body ground

Ground for ambient temperature sensor

Always

Below 1.0 Q

GND (E8-12) - Body ground

W-B - Body ground

Ground for main power supply

Always

Below 1.0 Q

Symbols (Terminals No.)

Wiring Color

Terminal Description

Condition

Specified Condition

A/C (E8-15) - GND (E8-12)

LG - W-B

A/C switch signal

Ignition switch: ON Defroster: OFF A/C switch: OFF ^ ON

Below 1 V ^ 11 to 14 V

Defroster mode detection switch signal

Ignition switch: ON A/C switch: OFF Defroster: OFF ^ ON

Below 1 V ^ 11 to 14 V

LED (E8-16) - Body ground

P - Body ground

A/C switch indicator signal

Engine idling A/C switch: ON Blower switch: 0 ^ 1

11 to 14 V ^ Below 4 V

PTC1* (E9-9) - GND (E8-12)

V - W-B

PTC heater relay operation signal

Engine idling

No. 3 heater control knob: Max Hot

Engine coolant temperature: Below 65°C (149°F)

Ambient temperature: Below 10°C (50°F)

Blower switch: 0 ^ 1

Waiting time: 10 seconds

Below 1 V ^ 11 to 14 V

PTC2* (E9-10) - GND (E8-12)

BR - W-B

PTC heater relay operation signal

Engine idling

No. 3 heater control knob: Max Hot

Engine coolant temperature: Below 65°C (149°F)

Ambient temperature: Below 10°C (50°F)

Blower switch: 0 ^ 1

Waiting time: 20 seconds

Below 1 V ^ 11 to 14 V

PTC3* (E9-12) - GND (E8-12)

R - W-B

PTC heater relay operation signal

Engine idling

No. 3 heater control knob: Max Hot

Engine coolant temperature: Below 65°C (149°F)

Ambient temperature: Below 10°C (50°F)

Blower switch: 0 ^ 1

Waiting time: 30 seconds

Below 1 V ^ 11 to 14 V

HEAT* (E9-14) - Body ground

LG - Body ground

MAX HOT switch detection signal

Ignition switch: ON

No. 3 heater control knob: Max Hot

11 to 14 V

HLS* (E9-23) - Body ground

LG - Body ground

Headlight control signal

Engine idling

Light control switch: OFF ^ HEAD

11 to 14 V ^ Below 1 V

ALT* (E9-24) - GND (E8-12)

P - W-B

Alternator operation signal

Engine idling

Pulse generation

Jtnrn

mm

'GND

'GND

nm.n., n

T n . n; r-ir

IffiDfc

5V/DIV.

1

«-GND

H

500^sec./DIV.

E074977E10

(a) Waveform 1 (Reference) : Using an oscilloscope CAN communication signal

Terminal Name

Between TX+ (E8-2) - GND (E8-12)

Tester Range

1 V / DIV., 10 |isec. / DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

(b) Waveform 2 (Reference) : Using an oscilloscope CAN communication signal

Terminal Name

Between TX- (E8-3) - GND (E8-12)

Tester Range

1 V / DIV., 10 isec. / DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

(c) Waveform 3 (Reference) : Using an oscilloscope Compressor and pulley operation signal

Terminal Name

Between SOL+ (E8-7) - GND (E8-12)

Tester Range

5 V / DIV., 500 isec. / DIV.

Condition

Engine idling, Blower switch 1, A/C switch ON

CG SG CANH SIL

CG SG CANH SIL

J H100769E16

Do It Yourself Car Diagnosis

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