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

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

SM2763706


id0740a28205y3

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

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 REMOVAL/INSTALLATION [(US)].)
(7)Passenger-side knee air bag module (with passenger-side knee air bag module) (See KNEE AIR BAG MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM – US/CANADA SPEC.].)

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
1.0 or less
• Related wiring harness
1E
IG
F47 15 A fuse
Switch the ignition ON (engine off or on)
B+
• Related wiring harness
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
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
Switch the ignition ON (engine off or on)
B+
• Related wiring harness
Switch the ignition off
B+ / 1.0 or less *5
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
Mode switch input *2
Drive selection switch
Ignition ON
Pressed to SPORT side (forward)
1.0 or less
• Related wiring harness
Pressed to — side (backward)
8.0
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 *3 / Position memory control module *4
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
1.0 or less
• 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:Drive selection switch
*3:Without driver-side power seat
*4:With driver-side power seat
*5:Terminal voltage differs depending on the operation condition of the dash-electrical supply unit.