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DASH-ELECTRICAL SUPPLY UNIT INSPECTION [MANUAL AIR CONDITIONER (E)]

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1. Disconnect the negative battery terminal and wait for 1 min or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

2. Remove the following parts:

(1) Glove compartment (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.)

(2) Dashboard under cover (See DASHBOARD UNDER COVER REMOVAL/INSTALLATION.)

(3) Passenger-side front scuff plate (See FRONT SCUFF PLATE REMOVAL/INSTALLATION.)

(4) Passenger-side front side trim (See FRONT SIDE TRIM REMOVAL/INSTALLATION.)

(5) Passenger-side decoration panel (See DECORATION PANEL REMOVAL/INSTALLATION.)

(6) Passenger-side lower panel (See LOWER PANEL DISASSEMBLY/ASSEMBLY [(E)].)

3. Connect the negative battery terminal.

4. Switch the ignition ON (engine off or on).

5. Connect the negative (-) lead of the tester to body ground.

6. Insert the positive (+) lead of the tester into each dash-electrical supply unit terminal and measure the voltage according to the terminal voltage table.

• If there is any malfunction, inspect the parts under “Inspection item (s)”.

Terminal Voltage Table (Reference)

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Terminal

Signal name

Connected to

Measurement condition

Voltage (V)

Inspection item (s)

1A

Foot light^*1

Foot light control

Foot light ON

1.0 or less

•  Related wiring harness

Foot light off

B+

1B

—

—

—

—

—

1C

—

—

—

—

—

1D

GND

Body ground

Under any condition

Approx. 0

•  GND point

•  Related wiring harness

1E

IG

F47 15 A fuse

Switch the ignition ON (engine off or on)

B+

•  Related wiring harness

•  F47 15 A fuse

Switch the ignition off

1.0 or less

1F

—

—

—

—

—

1G

+B

F16 15 A fuse

Under any condition

B+

•  Related wiring harness

•  F16 15 A fuse

1H

—

—

—

—

—

1I

HS_CAN_L

CAN related module

Because this terminal is for communication, integrity determination by terminal voltage is not possible.

•  Related wiring harness

1J

HS_CAN_L

CAN related module

Because this terminal is for communication, integrity determination by terminal voltage is not possible.

•  Related wiring harness

1K

HS_CAN_H

CAN related module

Because this terminal is for communication, integrity determination by terminal voltage is not possible.

•  Related wiring harness

1L

HS_CAN_H

CAN related module

Because this terminal is for communication, integrity determination by terminal voltage is not possible.

•  Related wiring harness

2A

—

—

—

—

—

2B

LIN1

•  Air mix actuator

•  Airflow mode actuator

•  Air intake actuator

•  PTC Heater ^*2

Because this terminal is for communication, integrity determination by terminal voltage is not possible.

•  Related wiring harness

2C

—

—

—

—

—

2D

—

—

—

—

—

2E

Evaporator temperature sensor input

Evaporator temperature sensor

Compared with temperature detected by evaporator temperature sensor

Refer to graph

•  Related wiring harness

2F

—

—

—

—

—

2G

Sensor GND

Evaporator temperature sensor

Under any condition

1.0 or less

•  Related wiring harness

2H

GND_HVAC_1

•  Air mix actuator

•  Airflow mode actuator

•  Air intake actuator

Under any condition

1.0 or less

•  Related wiring harness

2I

—

—

—

—

—

2J

IG_HVAC_1

•  Air mix actuator

•  Airflow mode actuator

•  Air intake actuator

•  PTC heater ^*2

Switch the ignition ON (engine off or on)

B+

•  Related wiring harness

Switch the ignition off

B+ / 1.0 or less ^*7

3A

HS_CAN_H

CAN related module

Because this terminal is for communication, integrity determination by terminal voltage is not possible.

•  Related wiring harness

3B

HS_CAN_L

CAN related module

Because this terminal is for communication, integrity determination by terminal voltage is not possible.

•  Related wiring harness

3C

—

—

—

—

—

3D

—

—

—

—

—

3E

—

—

—

—

—

3F

—

—

—

—

—

3G^*8

Mode switch input ^*3

Drive selection switch

Ignition ON

Pressed to SPORT side (forward)

1.0 or less

•  Related wiring harness

Pressed to OFF side (backward)

8.0

Not pressed

9.0

3G^*9

Mode switch input ^*3

Drive selection switch

Ignition ON

Pressed to SPORT side (forward)

8.0

•  Related wiring harness

Pressed to OFF side (backward)

1.0 or less

Not pressed

9.0

3H

Buckle switch input

Driver-side buckle switch

Ignition ON

Driver-side front buckle fastened

B+

•  Related wiring harness

Driver-side front buckle unfastened

1.0 or less

3I

—

—

—

—

—

3J

LIN2

Seat warmer control unit ^*4/ Position memory control module ^*5 / Heated steering wheel control unit ^*6

Because this terminal is for communication, integrity determination by terminal voltage is not possible.

•  Related wiring harness

4A

Motor operation (-)

Blower motor

Switch the ignition off

1.0 or less

•  Related wiring harness

•  Blower motor

Fan stopped (Switch the ignition ON (engine off or on))

B+

4B

—

—

—

—

—

4C

Blower motor GND

Body ground

Under any condition

Approx. 0

•  GND point

•  Related wiring harness

4D

—

—

—

—

—

4E

Motor operation (+)

Blower motor

Switch the ignition off

1.0 or less

•  Related wiring harness

•  Blower motor

Switch the ignition ON (engine off or on)

B+

4F

B+

Blower relay

Switch the ignition off

1.0 or less

•  Related wiring harness

Switch the ignition ON (engine off or on)

B+

Terminal	Signal name	Connected to	Measurement condition	Voltage (V)	Inspection item (s)
1A	Foot light^*1	Foot light control	Foot light ON	1.0 or less	• Related wiring harness
Foot light off	B+
1B	—	—	—	—	—
1C	—	—	—	—	—
1D	GND	Body ground	Under any condition	Approx. 0	• GND point • Related wiring harness
1E	IG	F47 15 A fuse	Switch the ignition ON (engine off or on)	B+	• Related wiring harness • F47 15 A fuse
Switch the ignition off	1.0 or less
1F	—	—	—	—	—
1G	+B	F16 15 A fuse	Under any condition	B+	• Related wiring harness • F16 15 A fuse
1H	—	—	—	—	—
1I	HS_CAN_L	CAN related module	Because this terminal is for communication, integrity determination by terminal voltage is not possible.	• Related wiring harness
1J	HS_CAN_L	CAN related module	Because this terminal is for communication, integrity determination by terminal voltage is not possible.	• Related wiring harness
1K	HS_CAN_H	CAN related module	Because this terminal is for communication, integrity determination by terminal voltage is not possible.	• Related wiring harness
1L	HS_CAN_H	CAN related module	Because this terminal is for communication, integrity determination by terminal voltage is not possible.	• Related wiring harness
2A	—	—	—	—	—
2B	LIN1	• Air mix actuator • Airflow mode actuator • Air intake actuator • PTC Heater ^*2	Because this terminal is for communication, integrity determination by terminal voltage is not possible.	• Related wiring harness
2C	—	—	—	—	—
2D	—	—	—	—	—
2E	Evaporator temperature sensor input	Evaporator temperature sensor	Compared with temperature detected by evaporator temperature sensor	Refer to graph	• Related wiring harness
2F	—	—	—	—	—
2G	Sensor GND	Evaporator temperature sensor	Under any condition	1.0 or less	• Related wiring harness
2H	GND_HVAC_1	• Air mix actuator • Airflow mode actuator • Air intake actuator	Under any condition	1.0 or less	• Related wiring harness
2I	—	—	—	—	—
2J	IG_HVAC_1	• Air mix actuator • Airflow mode actuator • Air intake actuator • PTC heater ^*2	Switch the ignition ON (engine off or on)	B+	• Related wiring harness
Switch the ignition off	B+ / 1.0 or less ^*7
3A	HS_CAN_H	CAN related module	Because this terminal is for communication, integrity determination by terminal voltage is not possible.	• Related wiring harness
3B	HS_CAN_L	CAN related module	Because this terminal is for communication, integrity determination by terminal voltage is not possible.	• Related wiring harness
3C	—	—	—	—	—
3D	—	—	—	—	—
3E	—	—	—	—	—
3F	—	—	—	—	—
3G^*8	Mode switch input ^*3	Drive selection switch	Ignition ON	Pressed to SPORT side (forward)	1.0 or less	• Related wiring harness
Pressed to OFF side (backward)	8.0
Not pressed	9.0
3G^*9	Mode switch input ^*3	Drive selection switch	Ignition ON	Pressed to SPORT side (forward)	8.0	• Related wiring harness
Pressed to OFF side (backward)	1.0 or less
Not pressed	9.0
3H	Buckle switch input	Driver-side buckle switch	Ignition ON	Driver-side front buckle fastened	B+	• Related wiring harness
Driver-side front buckle unfastened	1.0 or less
3I	—	—	—	—	—
3J	LIN2	Seat warmer control unit ^4/ Position memory control module ^5 / Heated steering wheel control unit ^*6	Because this terminal is for communication, integrity determination by terminal voltage is not possible.	• Related wiring harness
4A	Motor operation (-)	Blower motor	Switch the ignition off	1.0 or less	• Related wiring harness • Blower motor
Fan stopped (Switch the ignition ON (engine off or on))	B+
4B	—	—	—	—	—
4C	Blower motor GND	Body ground	Under any condition	Approx. 0	• GND point • Related wiring harness
4D	—	—	—	—	—
4E	Motor operation (+)	Blower motor	Switch the ignition off	1.0 or less	• Related wiring harness • Blower motor
Switch the ignition ON (engine off or on)	B+
4F	B+	Blower relay	Switch the ignition off	1.0 or less	• Related wiring harness
Switch the ignition ON (engine off or on)	B+

*1 :With foot light

*2 :With PTC heater

*3 :With Drive selection switch

*4 :Without driver-side power seat

*5 :With driver-side power seat

*6 :With heated steering wheel

*7 :Terminal voltage differs depending on the operation condition of the dash-electrical supply unit.

*8 :L.H.D.

*9 :R.H.D.