 |
ac5wzw00001856
CLIMATE CONTROL UNIT INSPECTION [FULL-AUTO AIR CONDITIONER]
id0740a1802200
1. Remove the climate control unit with the connector connected. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
2. Switch the ignition ON (engine off or on).
3. Connect the negative (-) lead of the tester to body ground.
4. By inserting the positive (+) lead of the tester into each climate control unit terminal, measure the voltage according to the terminal voltage table.
Terminal Voltage Table (Reference)
ac5wzw00001856
|
|
Terminal |
Signal name |
Connected to |
Measurement condition |
Voltage (V) |
Inspection item (s) |
|---|---|---|---|---|---|
|
1A*1
|
Parking sensor OFF indicator
|
Parking sensor control module
|
Parking sensor OFF indicator on
|
0.6 or less
|
• Related wiring harness
• Parking sensor control unit
|
|
Parking sensor OFF indicator off
|
B+
|
||||
|
1B*1
|
Parking sensor OFF switch
|
Parking sensor control module
|
Keep parking sensor OFF switch push
|
2.0 or less
|
• Related wiring harness
• Parking sensor control unit
|
|
Release parking sensor OFF switch
|
5
|
||||
|
1C*2
|
Seat warmer switch signal
|
Seat warmer control unit
|
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
|
• Related wiring harness
|
|
|
1D
|
—
|
—
|
—
|
—
|
—
|
|
1E
|
B+
|
ROOM 15 A fuse
|
Under any condition
|
B+
|
• Related wiring harness
• ROOM 15 A fuse
|
|
1F
|
Evaporator temperature sensor input
|
Evaporator temperature sensor
|
Compared with temperature detected by evaporator temperature sensor
|
Refer to graph 1
|
• Related wiring harness
• Evaporator temperature sensor
• Climate control unit: terminal voltage (1X)
|
|
1G
|
DC/DC IG1*3
|
Ignition relay
|
Switch the ignition ON (engine off or on)
|
B+
|
• Related wiring harness
• Ignition relay
|
|
Switch the ignition off
|
1.0 or less
|
||||
|
IG1*4
|
C/U IG1 15 A fuse
|
Switch the ignition ON (engine off or on)
|
B+
|
• Related wiring harness
• C/U IG1 15 A fuse
|
|
|
Switch the ignition off
|
1.0 or less
|
||||
|
1H
|
+5V
|
• Driver-side air mix actuator
• Passenger-side air mix actuator
• Airflow mode actuator
• Solar radiation sensor
|
Under any condition
|
5
|
• Related wiring harness
• Driver-side air mix actuator
• Passenger-side air mix actuator
• Airflow mode actuator
• Solar radiation sensor
• Climate control unit: terminal voltage (1X)
|
|
1I*5
|
Water pump
|
Water pump
|
Water pump on
|
0.2 or less
|
• Related wiring harness
• Water pump
|
|
Water pump off
|
B+
|
||||
|
1J
|
Cabin temperature sensor input
|
Cabin temperature sensor
|
Compared with temperature detected by cabin temperature sensor
|
Refer to graph 2
|
• Related wiring harness
• Cabin temperature sensor
• Climate control unit: terminal voltage (1X)
|
|
1K
|
—
|
—
|
—
|
—
|
—
|
|
1L*6
|
Heater core temperature sensor input
|
Heater core temperature sensor
|
Compared with temperature detected by heater core temperature sensor
|
Refer to graph 3
|
• Related wiring harness
• Heater core temperature sensor
• Climate control unit: terminal voltage (1X)
|
|
1M
|
—
|
—
|
—
|
—
|
—
|
|
1N
|
Potentiometer input
|
• Driver-side air mix actuator (L.H.D.)
• Passenger-side air mix actuator (R.H.D.)
|
Set temperature at MAX HOT
|
4.3 or more
|
• Related wiring harness
• Driver-side air mix actuator (L.H.D.)
• Passenger-side air mix actuator (R.H.D.)
• Climate control unit: terminal voltage (1X)
|
|
Set temperature at MAX COLD
|
1.0 or less
|
||||
|
1O
|
—
|
—
|
—
|
—
|
—
|
|
1P
|
Potentiometer input
|
• Passenger-side air mix actuator (L.H.D.)
• Driver-side air mix actuator (R.H.D.)
|
Set temperature at MAX HOT
|
4.3 or more
|
• Related wiring harness
• Passenger-side air mix actuator (L.H.D.)
• Driver-side air mix actuator (R.H.D.)
• Climate control unit: terminal voltage (1X)
|
|
Set temperature at MAX COLD
|
1.0 or less
|
||||
|
1Q
|
—
|
—
|
—
|
—
|
—
|
|
1R
|
Potentiometer input
|
Airflow mode actuator
|
VENT
|
4.3 or more
|
• Related wiring harness
• Airflow mode actuator
• Climate control unit: terminal voltage (1X)
|
|
BI-LEVEL
|
3.4
|
||||
|
HEAT
|
2.5
|
||||
|
HEAT/DEF
|
1.6
|
||||
|
DEFROSTER
|
0.7 or less
|
||||
|
1S
|
MS_CAN_H
|
CAN related module
|
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
|
• Related wiring harness
|
|
|
1T
|
Solar radiation sensor (RH) input
|
Solar radiation sensor
|
Sunlight shined directly on the solar radiation sensor
|
4
|
• Related wiring harness
• Climate control unit: terminal voltage (1H)
• Solar radiation sensor
|
|
Blocking light to solar radiation sensor
|
1.0 or less
|
||||
|
1U
|
MS_CAN_L
|
CAN related module
|
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
|
• Related wiring harness
|
|
|
1V
|
Solar radiation sensor (LH) input
|
Solar radiation sensor
|
Sunlight shined directly on the solar radiation sensor
|
4
|
• Related wiring harness
• Climate control unit: terminal voltage (1H)
• Solar radiation sensor
|
|
Blocking light to solar radiation sensor
|
1.0 or less
|
||||
|
1W
|
GND
|
Body ground
|
Under any condition
|
1.0 or less
|
• Related wiring harness
|
|
1X
|
Sensor GND
|
• Driver-side air mix actuator
• Passenger-side air mix actuator
• Airflow mode actuator
• Evaporator temperature sensor
• Heater core temperature sensor*6
|
Under any condition
|
1.0 or less
|
• Related wiring harness
• Climate control unit: terminal voltage (1H)
|
|
2A
|
Blower motor feedback
|
• Blower motor
• Power MOS FET
|
Fan stopped
|
B+
|
• Power MOS FET
• Blower motor
• Blower relay
• HEATER 40 A fuse
• Power MOS FET replacement
• Related wiring harness
|
|
Fan: manual 1st
|
10.33
|
||||
|
Fan: manual 7th
|
0.4 or less
|
||||
|
2B
|
—
|
—
|
—
|
—
|
—
|
|
2C
|
IG2
|
Front body control module (FBCM)
|
Switch the ignition ON (engine off or on)
|
B+
|
• Related wiring harness
• Front body control module (FBCM)
|
|
Switch the ignition off
|
1.0 or less
|
||||
|
2D
|
Blower fan speed control
|
Power MOS FET
|
Fan stopped
|
1.0 or less
|
• Related wiring harness
• Power MOS FET
|
|
Fan: manual 1st
|
2.2
|
||||
|
Fan: manual 7th
|
9.7
|
||||
|
2E
|
Motor operation (HOT)
|
• Driver-side air mix actuator (L.H.D.)
• Passenger-side air mix actuator (R.H.D.)
|
Moving towards HOT
|
B+
|
• Related wiring harness
• Driver-side air mix actuator (L.H.D.)
• Passenger-side air mix actuator (R.H.D.)
|
|
Moving towards COLD
|
1.0 or less
|
||||
|
2F
|
Motor operation (HOT)
|
• Passenger-side air mix actuator (L.H.D.)
• Driver-side air mix actuator (R.H.D.)
|
Moving towards HOT
|
B+
|
• Related wiring harness
• Passenger-side air mix actuator (L.H.D.)
• Driver-side air mix actuator (R.H.D.)
|
|
Moving towards COLD
|
1.0 or less
|
||||
|
2G
|
Motor operation (COLD)
|
• Driver-side air mix actuator (L.H.D.)
• Passenger-side air mix actuator (R.H.D.)
|
Moving towards HOT
|
1.0 or less
|
• Related wiring harness
• Driver-side air mix actuator (L.H.D.)
• Passenger-side air mix actuator (R.H.D.)
|
|
Moving towards COLD
|
B+
|
||||
|
2H
|
Motor operation (COLD)
|
• Passenger-side air mix actuator (L.H.D.)
• Driver-side air mix actuator (R.H.D.)
|
Moving towards HOT
|
1.0 or less
|
• Related wiring harness
• Passenger-side air mix actuator (L.H.D.)
• Driver-side air mix actuator (R.H.D.)
|
|
Moving towards COLD
|
B+
|
||||
|
2I
|
Motor operation (VENT)
|
Airflow mode actuator
|
Moving towards VENT
|
B+
|
• Related wiring harness
• Airflow mode actuator
|
|
Moving towards DEFROSTER
|
1.0 or less
|
||||
|
2J
|
Motor operation (FRESH)
|
Air intake actuator
|
Moving towards RECIRCULATE
|
1.0 or less
|
• Related wiring harness
• Air intake actuator
|
|
Moving towards FRESH
|
B+
|
||||
|
2K
|
Motor operation (DEFROSTER)
|
Airflow mode actuator
|
Moving towards DEFROSTER
|
B+
|
• Related wiring harness
• Airflow mode actuator
|
|
Moving towards VENT
|
1.0 or less
|
||||
|
2L
|
Motor operation (RECIRCULATE)
|
Air intake actuator
|
Moving towards RECIRCULATE
|
B+
|
• Related wiring harness
• Air intake actuator
|
|
Moving towards FRESH
|
1.0 or less
|
||||
 |
 |
 |
—
|