Thermistor Inspection; Removal Of Thermistor; Installation Of Thermistor; Inspection Of A/C Cut Off Relay - Toyota HILUX 1993 Repair Manual

AC–30
AIR CONDITIONING SYSTEM
THERMISTOR
ON–VEHICLE INSPECTION
1. DISCONNECT NEGATIVE BATTERY CABLE
2. REMOVE GLOVE BOX
3. DISCONNECT CONNECTOR OF THERMISTOR
4. CHECK RESISTANCE OF THERMISTOR
Measure the resistance between terminals.
Standard resistance: 1,500
If resistance is not as specified, replace the thermistor.
REMOVAL AND INSPECTION OF
THERMISTOR
1. REMOVE AND DISASSEMBLE COOLING UNIT
(SEE PAGE AC–25)
2. REMOVE THERMISTOR FROM EVAPORATOR
3. CHECK THERMISTOR OPERATION
(a) Place the thermistor in cold water. While varying the
(b) Compare the two readings on the chart.
If the intersection is not between the two lines, replace
the thermistor.

INSTALLATION OF THERMISTOR

1. INSTALL THERMISTOR TO EVAPORATOR
2. ASSEMBLE AND INSTALL COOLING UNIT
RELAY

INSPECTION OF A/C CUT OFF RELAY

4WD Models with 3VZ–E E/G and AM
INSPECT A/C CUT OF RELAY CONTINUITY
Apply battery positive
voltage to terminals 1 and 3.
If continuity is not as specified, replace the relay.
– Relay
temperature of the water, measure the resistance at
the connector and at the same time; measure the
temperature of the water with a thermometer.
Terminal
Condition
Constant
S S
at 25 C (77 F)