HEATER, AIR CONDITIONER AND VENTILATION ±
Heater Unit, Blower Unit,
Resister and Evaporator
55-24
INSPECTION
RESISTOR CHECK
Use a circuit tester to measure the resistance between the
terminals as indicated below. Check that the measured value
is at the standard value.
Standard value:
Measurement terminal Standard value Ω
Between terminals 1 and 3 (LO) 2.3
Between terminals 1 and 6 (ML) 1.0
Between terminals 1 and 4 (MH) 0.3
DISASSEMBLY AND REASSEMBLY
2
3
1
4
5
6
7
Disassembly steps
1. Cover
2. Heater core
3. Expansion valve
4. Joint
5. Cover
6. Evaporator
7. Air thermosensor
INSPECTION
AIR THERMOSENSOR CHECK
Measure the resistance between terminals under two or more
temperature conditions. The resistance should be close to
the values shown in the graph.
kΩ
25
15
10
5
0
±10 0 10 20 30 40
_C
Resis-
tance
Temperature
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