|
Terminal
|
Signal name
|
Connected to
|
Measurement condition
|
Voltage (V)
|
Inspection item (s)
|
|
A
|
TNS signal
|
PJB
|
Headlight switch OFF
|
1.0 or less
|
• Wiring harness: short circuit (Climate control unit-PJB: A-J-03 H)
• Panel light control switch
• Headlight switch
|
|
Headlight switch ON
|
B+
|
• Wiring harness: continuity, short circuit (Climate control unit-PJB: A-J-03 H)
• Panel light control switch
• Headlight switch
|
|
B
|
TNS signal
|
Panel light control switch
|
Headlight switch ON and panel light control switch at max. illumination
|
1.0 or less
|
• Wiring harness: continuity (Climate control unit-panel light control switch: B-F)
• Panel light control switch
• Climate control unit: terminal voltage (A)
|
|
Headlight switch ON and panel light control switch at min. illumination
|
12
|
• Wiring harness: short circuit (Climate control unit-panel light control switch: B-F)
|
|
C
|
Motor operation
|
Air mix actuator
|
Moving towards COLD
|
12
|
• Wiring harness: continuity, short circuit (Climate control unit-air mix actuator: C-D, E-F)
• Air mix actuator
|
|
Moving towards HOT
|
1.0 or less
|
|
D
|
Blower fan speed control
|
Power MOS FET
|
Fan stopped
|
1.0 or less
|
• Climate control unit: terminal voltage (F)
|
|
Fan: manual LO
|
2.9
|
|
Fan: manual HI
|
9.7
|
|
E
|
Motor operation
|
Air mix actuator
|
Moving towards COLD
|
1.0 or less
|
• Wiring harness: continuity, short circuit (Climate control unit-air mix actuator: E-F, C-D)
• Air mix actuator
|
|
Moving towards HOT
|
12
|
|
F
|
Blower motor feedback
|
• Blower motor
• Power MOS FET
|
Fan stopped
|
B+
|
1. Wiring harness: continuity, short circuit (Climate control unit-blower motor: F-B) (Climate control unit-power MOS FET: F-B, D-C) (Blower motor-blower relay: A-E) (Blower relay-fuse: A-HEATER 40 A, B-A/C 10 A)
2. Wiring harness: continuity (Power MOS FET-body ground: A-GND) (Blower relay-body ground: D-GND)
3. Power MOS FET
4. Blower motor
5. Blower relay
6. A/C 10 A fuse
7. HEATER 40 A fuse
8. Power MOS FET replacement
|
|
Fan: manual LO
|
9.8
|
|
Fan: manual HI
|
0.5
|
|
G
|
Motor operation
|
Airflow mode actuator
|
Switched to DEFROSTER
|
12
|
• Wiring harness: continuity, short circuit (Climate control unit-airflow mode actuator: G-F, I-D)
• Airflow mode actuator
|
|
Switched to VENT
|
1.0 or less
|
|
H
|
-
|
-
|
-
|
-
|
-
|
|
I
|
Motor operation
|
Airflow mode actuator
|
Switched to DEFROSTER
|
1.0 or less
|
• Wiring harness: continuity, short circuit (Climate control unit-airflow mode actuator: I-D, G-F)
• Airflow mode actuator
|
|
Switched to VENT
|
12
|
|
J
|
B+
|
ROOM 15 A fuse
|
Under any condition
|
B+
|
• Wiring harness: continuity, short circuit (Climate control unit- fuse: J-ROOM 15 A)
• ROOM 15 A fuse
|
|
K
|
IG2
|
A/C 10 A fuse
|
IG SW ON
|
B+
|
• Wiring harness: continuity, short circuit (Climate control unit- fuse: K-A/C 10 A)
• A/C 10 A fuse
|
|
IG SW LOCK
|
1.0 or less
|
• Wiring harness: continuity, short circuit (Climate control unit- fuse: K-A/C 10 A)
|
|
L
|
Potentiometer input
|
Airflow mode actuator
|
VENT
|
4.5
|
• Wiring harness: continuity, short circuit (Climate control unit-airflow mode actuator: L-C)
• Airflow mode actuator
• Climate control unit: terminal voltage (P)
|
|
BILEVEL
|
3.7
|
|
HEAT
|
2.9
|
|
HEAT/DEF
|
1.9
|
|
DEFROSTER
|
0.8
|
|
M
|
Motor operation
|
Air intake actuator
|
Switched to RECIRCULATE
|
1.0 or less
|
• Wiring harness: continuity, short circuit (Climate control unit-air intake actuator: M-G, O-E, Q-C)
• Air intake actuator
|
|
Switched to FRESH
|
12
|
|
N
|
Potentiometer input
|
Air mix actuator
|
Set temperature at MAX COLD
|
0.8
|
• Wiring harness: continuity, short circuit (Climate control unit-air mix actuator: N-C)
• Air mix actuator
• Climate control unit: terminal voltage (P)
|
|
Set temperature at MAX HOT
|
4.5
|
|
O
|
Motor operation
|
Air intake actuator
|
Switched to RECIRCULATE
|
12
|
• Wiring harness: continuity, short circuit (Climate control unit-air intake actuator: M-G, O-E)
• Air intake actuator
|
|
Switched to FRESH
|
1.0 or less
|
|
P
|
+5 V
|
• Air mix actuator
• Airflow mode actuator
• Solar radiation sensor
|
IG SW ON
|
5.2
|
• Wiring harness: short circuit (Climate control unit-air mix actuator, airflow mode actuator, solar radiation sensor: P-A, B, A)
• Air mix actuator
• Airflow mode actuator
• Solar radiation sensor
• Climate control unit: terminal voltage (K, V)
|
|
IG SW LOCK
|
0
|
• Climate control unit replacement
|
|
Q
|
Motor operation
|
Air intake actuator
|
Switched to RECIRCULATE
|
1.0 or less
|
• Wiring harness: continuity, short circuit (Climate control unit-air intake actuator: Q-C, M-G)
• Air intake actuator
|
|
Switched to FRESH
|
12
|
|
R
|
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: R-D, U-B)
• Wiring harness: short circuit (Climate control unit-cabin temperature sensor: R-B)
• Cabin temperature sensor
• Climate control unit: terminal voltage (K, V)
|
|
S
|
Solar radiation sensor input
|
Solar radiation sensor
|
Incandescent light (approx. 60 W) shined directly on the solar radiation sensor from a distance of approx. 100 mm {3.9 in}
|
4.0
|
• Wiring harness: continuity (Climate control unit-solar radiation sensor: S-B, P-A)
• Climate control unit: terminal voltage (P)
• Solar radiation sensor
|
|
Blocking light to solar radiation sensor
|
1.0 or less
|
|
T
|
Evaporator temperature sensor input
|
Evaporator temperature sensor
|
Compared with temperature detected by evaporator temperature sensor
|
Refer to graph 1
|
• Wiring harness: continuity (Climate control unit-evaporator temperature sensor: T-B, U-A)
• Wiring harness: short circuit (Climate control unit-evaporator temperature sensor: T-B)
• Evaporator temperature sensor
• Climate control unit: terminal voltage (K, V)
|
|
U
|
Sensor GND
|
• Cabin temperature sensor
• Evaporator temperature sensor
• Air mix actuator
• Airflow mode actuator
|
Under any condition
|
1.0 or less
|
• Climate control unit: terminal voltage (V)
|
|
V
|
GND
|
Body ground
|
Under any condition
|
1.0 or less
|
• Wiring harness: continuity (Climate control unit-GND: V-GND)
|
|
W
|
Signal
|
-
|
-
|
-
|
-
|
|
X
|
Signal
|
-
|
-
|
-
|
-
|
