Mazda MX-6 1998, Workshop Manual

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TROUBLESHOOTING
STEP
INSPECTION
ACTION
7 Are the refrigerant pressure’s high-pressure
side and low-pressure side values low?
Yes Go to next step.
No
G o to step 11.
8 Inspect refrigerant lines.
• Is piping free of damage and cracks?
• Are piping connections free of oil grime?
(visual inspection)
• Are piping connections free of gas
leakage?
Are above items okay?
Yes
Adjust both compressor oil and refrigerant to specified
amount, then go to step 14.
No
If piping is damaged or cracked, replace it, then go to step
14. if there is no damage, go to next step.
9 Are piping connections loose? Yes Tighten connections to specified torque, adjust both
compressor oil and refrigerant to specified amount, then
go to step 14.
No
Replace O-ring on piping, adjust both compressor oil and
refrigerant to specified amount, then go to step 14.
10 Turn A/C switch off and let air conditioner stop
for
10 minutes.
Start engine.
Turn both A/C switch and fan switch on.
Does malfunction occur after A/C compressor
turns on?
Yes
Go to next step.
No
Replace accumulator tank, then go to step 14. (Since
water has intermixed in accumulator tank, replacement is
necessary.)
11 Does refrigerant pressure’s high-pressure side
hardly increase? Yes
Go to next step. (Pressure hardly increases.)
No
Reconfirm malfunction symptoms.
12
When engine is racing, does pressure on
high-pressure side increase? Yes Return to step 3.
No
Go to next step.
13 Remove A/C compressor and drain
compressor oil.
d
- 07-11 A/C COMPRESSOR
REMOVAL/INSTALLATION
Check charged compressor oil amount.
Refill specified compressor oil amount into
A/C compressor.
After compressor oil is replenished to
specified amount, does pressure on
high-pressure side increase?
Yes Troubleshooting completed. (Explain to custom er that the
cause was insufficient compressor oil.)
No
Replace A/C compressor, then go to next step. (The
cause is defective compression of A/C compressor.)
14
Is cool air discharged? (Are the results of
refrigerant system performance test okay?) Yes Troubleshooting completed. Explain repairs to customer.
No Reconfirm malfunction symptoms, then repeat from step 1
if malfunction reoccurs.
6
Air does not blow out at all.
Airflow volume does not change when operating fan switch.
TROUBLESHOOTING HINTS
Malfunction in blower relay, blower motor, resistor, and fan switch circuit
• Step
1
Malfunction in blower unit circuit
• Fan and blower unit case malfunction
STEP INSPECTION ACTION
1 Inspect the following systems, electrical parts.
• Blower relay, blower motor, resistor, fan
switch.
Are they okay?
Yes
Go to next step.
No Repair or replace malfunctioning part, then go to step 5.
2
Turn ignition switch to ON.
Set to recirculate mode.
Does fan in blower unit rotate smoothly?
Yes Go to step 4.
No Go to next step.
3
Inspect fan in blower unit.
• Is fan free of interference with blower unit
case?
• Is fan free of foreign material and
obstructions?
Is fan okay?
Yes Go to next step.
No Remove obstruction, repair or replace fan and blower unit
case, then go to step 5.
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