Mitsubishi 3000GT Service Manual page 1284

FULL AUTO AIR CONDITIONING - Troubleshootinn
4. Inspection of engine coolant temperature sensor and photo sensor circuits
<Engine coolant temperature sensor>
Airconditioning
control panel
Engine coolant
temperature
sensor
Troubleshooting Hints
Air conditioning control unit terminal voltages
l
Terminal No.
69 Photo sensor (-)
Photo sensor (+)
70
Engine coolant temperature sen-
59
sor (+)
Potentiometer
Signal name
llluminance 100,000 lux or more
llluminance less than 0 lux
Normally
Switch OFF [Engine coolant temperature
less than 50°C (122"F)]
Switch ON [Engine coolant temperature
TSB Revision
Air conditioning
Each sensor
control unit
Condition
Air control panel
Air
conditioning
transistor
Terminal voltage
-0.1 to -0.2 v
OV
o v
Battery positive
voltage
0 V