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am3uuw00004198
CLIMATE CONTROL UNIT INSPECTION [MANUAL AIR CONDITIONER]
id0740a2802200
1. Remove the climate control unit with the connector connected. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)
2. Switch the ignition to ON.
3. Connect the negative (-) lead of the tester to the body ground.
4. By inserting the positive (+) lead of the tester into the climate control unit connector, measure the voltage according to the terminal voltage table.
am3uuw00004198
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Terminal Voltage Table (Reference)
|
Terminal |
Signal name |
Connected to |
Measurement condition |
Voltage (V) |
Inspection item(s) |
|---|---|---|---|---|---|
|
1A
|
―
|
―
|
―
|
―
|
―
|
|
1B
|
Motor operation
|
Air intake actuator
|
Switched to RECIRCULATE
|
B+
|
• Related wiring harness
• Air intake actuator
|
|
Switched to FRESH
|
1.0 or less
|
||||
|
1C
|
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 (1G)
|
|
1D
|
―
|
―
|
―
|
―
|
―
|
|
1E
|
―
|
―
|
―
|
―
|
―
|
|
1F
|
Motor operation
|
Air intake actuator
|
Switched to RECIRCULATE
|
1.0 or less
|
• Related wiring harness
• Air intake actuator
|
|
Switched to FRESH
|
B+
|
||||
|
1G
|
Sensor GND
|
• Evaporator temperature sensor
• Refrigerant pressure sensor*3
|
Under any condition
|
1.0 or less
|
• Related wiring harness
• Evaporator temperature sensor
• Refrigerant pressure sensor*3
• Climate control unit: terminal voltage (1H)
|
|
1H*3
|
+5 V
|
Refrigerant pressure sensor
|
Switch the ignition to ON
|
5
|
• Related wiring harness
• Climate control unit: terminal voltage (1G)
|
|
1I
|
Ground
|
Body ground
|
Under any condition
|
1.0 or less
|
• Related wiring harness
|
|
1J
|
―
|
―
|
―
|
―
|
―
|
|
1K
|
―
|
―
|
―
|
―
|
―
|
|
1L
|
Blower fan ON/OFF signal
|
Fan switch
|
Fan stopped
|
B+
|
• Related wiring harness
• Resistor
• Fan switch terminal voltage (D)
|
|
Fan on
|
1.0 or less
|
||||
|
2A
|
Illumination (-)
|
Instrument cluster
|
Headlight ON and panel light control MAX
|
2.0
|
• Instrument cluster
• Related wiring harness
|
|
Headlight ON and panel light control MIN
|
9.65
|
||||
|
2B
|
B+
|
ROOM 15 A fuse
|
Switch the ignition to ON
|
B+
|
• Related wiring harness
• ROOM 15 A fuse
|
|
Switch the ignition to Off
|
1.0 or less
|
||||
|
2C
|
―
|
―
|
―
|
―
|
―
|
|
2D*3
|
LIN
|
BCM
|
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
|
• Related wiring harness
|
|
|
2E
|
―
|
―
|
―
|
―
|
―
|
|
2F
|
TNS signal
|
TNS relay
|
Headlight switch OFF
|
1.0 or less
|
• Related wiring harness
• TNS relay
• BCM
• Headlight switch
|
|
Headlight switch ON
|
B+
|
||||
|
2G
|
―
|
―
|
―
|
―
|
―
|
|
2H
|
IG2
|
HEATER 10 A fuse
|
Switch the ignition to ON
|
B+
|
• Related wiring harness
• HEATER 10 A fuse
|
|
Switch the ignition to Off
|
1.0 or less
|
||||
|
2I*1
|
Heated windshield signal
|
Heated windshield relay
|
Engine ON and heated windshield switch OFF
|
B+
|
• Related wiring harness
• Heated windshield relay
|
|
Engine ON and approx. 5s after heated windshield switch ON
|
1.0 or less
|
||||
|
2J*3
|
Refrigerant pressure sensor signal
|
Refrigerant pressure sensor
|
Compared with pressure detected by refrigerant pressure sensor
|
• Related wiring harness
• Refrigerant pressure sensor
• Climate control unit: terminal voltage (1G, 1H)
|
|
|
2K
|
Rear window defroster indicator
|
BCM
|
Rear window defroster switch OFF
|
11.12
|
• Related wiring harness
• BCM
|
|
Rear window defroster switch ON
|
1.0 or less
|
||||
|
2L*2
|
PTC request
|
Instrument cluster
|
PTC heater stopped
|
5.0
|
• Related wiring harness
• Instrument cluster
|
|
PTC heater operation
|
1.0 or less
|
||||
|
2M
|
―
|
―
|
―
|
―
|
―
|
|
2N
|
―
|
―
|
―
|
―
|
―
|
|
2O
|
Rear window defroster signal
|
BCM
|
While pressed rear window defroster switch
|
1.0 or less
|
• Related wiring harness
• Rear window defroster switch
• BCM
|
|
Released rear window defroster switch
|
4.7
|
||||
|
2P
|
A/C signal
|
Instrument cluster
|
A/C ON
|
1.0 or less
|
• Related wiring harness
• Instrument cluster
|
|
A/C OFF
|
4.8
|
||||
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