Air Conditioning System: Automatic Type 7B-69
Terminal Wire Color Circuit
Normal
Voltage
Condition
G52-1 WHT
Output of 5 V power
source for air flow control
actuator position sensor
and temperature control
actuator position sensor
4 – 6 V Ignition switch turned ON
G52-2 PNK
Output of 5 V power
source for sunload sensor
4 – 6 V Ignition switch turned ON
G52-3 ORN Ground for sensors Below 0.3 V Ignition switch turned ON
G52-4 WHT/BLK
Evaporator temperature
sensor signal
3.45 – 3.65 V
Ignition switch turned ON, evaporator temperature 0
°C (32 °F)
2.55 – 2.85 V
Ignition switch turned ON, evaporator temperature
15 °C (59 °F)
1.7 – 2.1 V
Ignition switch turned ON, evaporator temperature
30 °C (86 °F)
G52-5 YEL/BLK Sunload sensor signal
G52-6 PNK/BLK
Inside air temperature
sensor signal
About 2.0 V
Ignition switch turned ON, room temperature 25 °C
(77 °F)
About 2.8 V
Ignition switch turned ON, room temperature 0 °C
(32 °F)
G52-7 — — — —
G52-8 RED/BLK Electric power source 10 – 14 V Ignition switch turned ON
G52-9 — — — —
G52-10 — — — —
G52-11 BLK/ORN
Ground for HVAC control
module
Below 0.3 V Ignition switch turned ON
G52-12 — — — —
G52-13 YEL
Temperature control
actuator position sensor
signal
About 4.0 V
Ignition switch turned ON, temperature selector MAX
COOL position
About 2.0 V
Ignition switch turned ON, temperature selector MAX
HOT position
G52-14 WHT/BLU
Air flow control actuator
position sensor signal
About 4.0 V
Ignition switch turned ON, air flow selector VENT
position
About 1.6 V Ignition switch ON, air flow selector DEF position
G52-15 — — — —
G52-16 WHT/RED
Electric power source for
back-up
10 – 14 V Full-time