Page 1096 - Workshop Manual - Aumark (BJ1051)

51-4
Heater and air conditioner- heater and air conditioner
Malfunction symptom table

Use the table below to help you find the cause of the malfunction . The numbers indicate the
probability of the cause of the malfunction . Check each part in order. If necessary, replace these parts.
1. the refrigeration system doesn’t work
Symptom Suspect area Reference
1. fuse (damaged) -
2. belt (too loose) -
3. electromagnetic clutch (damaged) -
4. air conditioner cut-off relay -
(damaged)
5. a/c switch (damaged) Chapter 73 instrument panel/combination
meter/cigar lighter- instrument panel,
replacement

6. three-state pressure switch (damaged) Chapter 51 heater and air conditioner-
reservoir, replacement
The air volume is normal, but the
compressor doesn’t operate.
7. thermal bulb (damaged) Chapter 51 heater and air conditioner-
evaporator, replacement
8. A/C amplifier (damaged) -
9. electromagnetic clutch relay -
(damaged)
10. air conditioner relay (damaged) -
11. ECM (damaged) -
12. harness (open circuit or -
line-to-ground short circuit)
13. compressor (damaged) Chapter 51 heater and air conditioner-
air-conditioner compressor, replacement
The air blower has no air volume 1. fuse (damaged) -
51 2. harness (open circuit or -
line-to-ground short circuit)
3. air volume switch (damaged) Chapter 73 instrument panel/combination
meter/cigar lighter- instrument
panel,replacement

4. adjustable resistance (damaged) Chapter 51 heater and air conditioner- air
blower, replacement
5. air blower (damaged) Chapter 51 heater and air conditioner- air
blower, replacement
1. the refrigerant leaks seriously. Chapter 51 heater and air conditioner-
refrigerant, on-vehicle inspection
The refrigeration is not enough, 2. the compressor is damaged Chapter 51 heater and air conditioner-
but the air volume is normal and
the compressor operates. air-conditioner compressor, replacement
3. the reservoir is blocked. Chapter 51 heater and air conditioner-
reservoir, replacement

Page 1096