 |
acxwzw00001155
id0740a1802200
1.Remove the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
2.Install the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION.)
3.Connect the climate control unit connector.
4.Connect the negative (-) lead of the tester to body ground.
5.Turn the ignition switch to the ON position.
6.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)
acxwzw00001155
|
| Terminal |
Signal name |
Connected to |
Measurement condition |
Voltage (V) |
Inspection item (s) |
|---|---|---|---|---|---|
|
1A
|
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
|
|
|
1B
|
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
|
|
|
1C
|
Sensor GND
|
• Ambient temperature sensor
• Cabin temperature sensor
• Evaporator temperature sensor
• Air mix actuator
• Airflow mode actuator
• Refrigerant pressure sensor
|
Under any condition
|
1.0 or less
|
• Climate control unit: terminal voltage (1D)
|
|
1D
|
GND
|
Body ground
|
Under any condition
|
1.0 or less
|
• Wiring harness: continuity (Climate control unit—GND: 1D—GND)
|
|
1E
|
Solar radiation sensor input
|
Solar radiation sensor
|
Sunlight shined directly on the solar radiation sensor
|
4.0
|
• Wiring harness: continuity (Climate control unit—solar radiation sensor: 1E—B, 1J—A)
• Climate control unit: terminal voltage (1J)
• Solar radiation sensor
|
|
Blocking light to solar radiation sensor
|
0.1 or less
|
||||
|
1F
|
Evaporator temperature sensor input
|
Evaporator temperature sensor
|
Compared with temperature detected by evaporator temperature sensor
|
Refer to graph 3
|
• Wiring harness: continuity (Climate control unit—evaporator temperature sensor: 1F—B, 1C—A)
• Wiring harness: short circuit (Climate control unit—evaporator temperature sensor: 1F—B)
• Evaporator temperature sensor
• Climate control unit: terminal voltage (1D, 1M)
|
|
1G
|
Rear window defroster switch
|
Rear window defroster relay
|
Rear window defroster switch OFF
|
B+
|
• Wiring harness: continuity, short circuit (Climate control unit—rear window defroster relay: 1G—E)
• Rear window defroster relay
|
|
Rear window defroster switch ON
|
0.05
|
• Climate control unit: terminal voltage (1D, 1M)
• Climate control unit
|
|||
|
1H
|
Cabin temperature sensor input
|
Cabin temperature sensor
|
Compared with temperature detected by cabin temperature sensor
|
Refer to graph 2
|
• Wiring harness: continuity (Climate control unit—cabin temperature sensor: 1H—B, 1C—A)
• Wiring harness: short circuit (Climate control unit—cabin temperature sensor: 1H—B)
• Cabin compartment temperature sensor
• Climate control unit: terminal voltage (1D, 1M)
|
|
1I
|
Motor operation
|
Air intake actuator
|
Moving towards RECIRCULATE
|
10.75
|
• Wiring harness: continuity, short circuit (Climate control unit—air intake actuator: 1I—F, 1K—D)
• Air intake actuator
|
|
Moving towards FRESH
|
0.72
|
||||
|
1J
|
+5V
|
• Air mix actuator
• Airflow mode actuator
• Solar radiation sensor
• Refrigerant pressure sensor
|
IG SW ON
|
5.08
|
• Wiring harness: short circuit (Climate control unit-air mix actuator, airflow mode actuator, solar radiation sensor: 1J—A, B, A)
• Air mix actuator
• Airflow mode actuator
• Solar radiation sensor
• Refrigerant pressure sensor
• Climate control unit: terminal voltage (1D, 1M)
|
|
IG SW OFF
|
1.0 or less
|
• Climate control unit replacement
|
|||
|
1K
|
Motor operation
|
Air intake actuator
|
Moving towards FRESH
|
10.68
|
• Wiring harness: continuity, short circuit (Climate control unit—air intake actuator: 1K—D, 1I—F)
• Air intake actuator
|
|
Moving towards RECIRCULATE
|
0.68
|
||||
|
1L
|
Ambient temperature sensor input
|
Ambient temperature sensor
|
Compared with temperature detected by ambient temperature sensor
|
Refer to graph 1
|
• Wiring harness: continuity (Climate control unit—ambient temperature sensor: 1C—A, 1L—B)
• Wiring harness: short circuit (Climate control unit—ambient temperature sensor: 1L—B)
• Ambient temperature sensor
• Climate control unit: terminal voltage (1D, 1M)
|
|
1M
|
IG2
|
A/C 10 A fuse
|
IG SW ON
|
B+
|
• Wiring harness: continuity, short circuit (Climate control unit— fuse: 1M—A/C 10 A)
• A/C 10 A fuse
|
|
IG SW OFF
|
1.0 or less
|
• Wiring harness: continuity, short circuit (Climate control unit— fuse: 1M—A/C 10 A)
|
|||
|
1N
|
Refrigerant pressure sensor input
|
Refrigerant pressure sensor
|
Compared with temperature detected by refrigerant pressure sensor
|
• Wiring harness: continuity, short circuit (Climate control unit— refrigerant pressure sensor: 1N—B)
• Refrigerant pressure sensor
• Climate control unit: terminal voltage (1C, 1J)
|
|
|
1O
|
Motor operation
|
Airflow mode actuator
|
Moving towards VENT
|
10.66
|
• Wiring harness: continuity, short circuit (Climate control unit—airflow mode actuator: 1O—D, 1Q—F)
• Airflow mode actuator
|
|
Moving towards DEFROSTER
|
0.68
|
||||
|
1P
|
Potentiometer input
|
Airflow mode actuator
|
VENT
|
4.38
|
• Wiring harness: continuity, short circuit (Climate control unit— airflow mode actuator: 1P—C)
• Airflow mode actuator
• Climate control unit: terminal voltage (1J)
|
|
BILEVEL
|
3.51
|
||||
|
HEAT
|
2.59
|
||||
|
HEAT/DEF
|
1.67
|
||||
|
DEFROSTER
|
0.73
|
||||
|
1Q
|
Motor operation
|
Airflow mode actuator
|
Moving towards DEFROSTER
|
10.43
|
• Wiring harness: continuity, short circuit (Climate control unit—airflow mode actuator: 1Q—F, 1O—D)
• Airflow mode actuator
|
|
Moving towards VENT
|
0.68
|
||||
|
1R
|
B+
|
ROOM 15 A fuse
|
Under any condition
|
B+
|
• Wiring harness: continuity, short circuit (Climate control unit— fuse: 1R—ROOM 15 A)
• ROOM 15 A fuse
|
|
1S
|
Motor operation
|
Air mix actuator
|
Moving towards HOT
|
10.44
|
• Wiring harness: continuity, short circuit (Climate control unit—air mix actuator: 1S—F, 1U—D)
• Air mix actuator
|
|
Moving towards COLD
|
0.68
|
||||
|
1T
|
Blower motor feed back
|
• Blower motor
• Power MOS FET
|
Fan stopped
|
12.09
|
1. Wiring harness: continuity, short circuit (Climate control unit—blower motor: 1T—A) (Climate control unit—power MOS FET: 1T—B, 1V—E) (Blower motor—blower relay: B—A) (Blower relay—fuse: D—BLOWER 40 A)
2. Wiring harness: continuity (Power MOS FET—body ground: A—GND) (Blower relay—ground: A—GND)
3. Power MOS FET
4. Blower motor
5. Blower relay
6. BLOWER 40 A fuse
7. A/C 10 A fuse
8. Power MOS FET replacement
|
|
Fan: manual LO
|
7.60
|
||||
|
Fan: manual HI
|
0.25
|
||||
|
1U
|
Motor operation
|
Air mix actuator
|
Moving towards COLD
|
10.4
|
• Wiring harness: continuity, short circuit (Climate control unit—air mix actuator: 1U—D, 1S—F)
• Air mix actuator
|
|
Moving towards HOT
|
0.68
|
||||
|
1V
|
Blower fan speed control
|
Power MOS FET
|
Fan stopped
|
0.05
|
• Climate control unit: terminal voltage (1T)
|
|
Fan: manual LO
|
3.02
|
||||
|
Fan: manual HI
|
7.77
|
||||
|
1W
|
—
|
—
|
—
|
—
|
—
|
|
1X
|
Potentiometer input
|
Air mix actuator
|
Set temperature at MAX COLD
|
0.73
|
• Wiring harness: continuity, short circuit (Climate control unit— air mix actuator: 1X—C)
• Air mix actuator
• Climate control unit: terminal voltage (1J)
|
|
Set temperature at MAX HOT
|
4.38
|
||||
|
2K
|
TNS signal
|
TNS relay
|
Headlight switch OFF
|
1.0 or less
|
• Wiring harness: short circuit (Climate control unit—TNS relay: 2K—C)
• TNS relay
• Headlight switch
|
|
Headlight switch ON
|
B+
|
• Wiring harness: continuity, short circuit (Climate control unit—TNS relay: 2K—C)
• TNS relay
• Headlight switch
|
|||
|
2L
|
Illumination control
|
Instrument cluster
|
Headlight switch ON and panel light control switch at max
|
0.31
|
• Wiring harness: continuity (Climate control unit—instrument cluster: 2L—2H) (Instrument cluster—body ground: 2A—GND)
• Instrument cluster
|
|
Headlight switch ON and panel light control switch at min
|
9.56
|
• Wiring harness: short circuit (Climate control unit—instrument cluster: 2L—2H)
|
|||
 |
 |
 |
—
|