Mazda MX-6 1998, Workshop Manual

Page: 910 / 1282

TROUBLESHOOTING
STEP
INSPECTION
ACTION
2 4 ' Turn ignition switch to ON.
Turn A/C switch off.
Measure voltage at terminal A (A/C control
signal) of magnetic clutch connector.
Is voltage approximately 12 V?
Yes Inspect magnetic clutch, then go to next step.
D -
07-40 MAGNETIC CLUTCH INSPECTION
A / C C O M P R E S S O R
©
’ J
A
W 6 U 7 C )1 W A Q
No Repair wiring harness between A/C relay and magnetic
clutch, go to next step.
25 Is cool air discharged? (Is result of refrigerant
system performance test correct?)
Yes
Troubleshooting completed. Explain repairs to customer.
No Reconfirm malfunction symptoms, then repeat from step 1
if malfunction reoccurs.
5
Insufficient A/C cooling.
TROUBLESHOOTING HINTS
Malfunction in defective drive belt circuit
• Drive belt malfunction
Malfunction in heater unit’s air mix link circuit
• Air mix link, air mix crank, and air mix rod malfunction
Malfunction in blower unit or condenser circuit
• Condenser malfunction
Malfunction in refrigerant lines circuit
• Refrigerant lines malfunction
Malfunction in accumulator tank circuit
• Accumulator tank malfunction
Malfunction in A/C compressor circuit, insufficient compressor oil
• A/C compressor malfunction
STEP
INSPECTION
ACTION
1 Perform refrigerant system performance test.
w 0 7 -1 0 REFRIGERANT SYSTEM
PERFORMANCE TEST
Is operation okay?
Yes Operation is normal. (Reconfirm malfunction symptoms.)
No Go to next step.
2 Inspect drive belt.
cr
0 1 -1 0 DRIVE BELT INSPECTION
Is it okay?
Yes Go to next step.
No Adjust or replace drive belt, then go to step 14.
c r 0 1-10 DRIVE BELT ADJUSTMENT
3
Inspect refrigerant pressure.
w 0 7 -1 0 REFRIGERANT PRESSURE
CHECK
Are both the high-pressure side and
low-pressure side values high?
Yes
Go to next step.
No Go to step 7.
4
Are heater unit's air mix link, air mix crank,
and air mix rod properly and securely installed
in the correct position?
Yes Go to next step.
No
Repair or securely and properly install link, crank, and rod,
then go to step 14.
5
Is inlet of blower unit clogged?
Yes
Remove obstruction, then go to step 14. (Within the
cooling unit, if air does not reach evaporator, heat
exchange does not occur and refrigerant pressure
becomes high. Therefore, removal of obstruction is
necessary.)
No Go to next step.
6
Inspect condenser.
c r 07-11 CONDENSER INSPECTION
Is it okay?
Yes
Adjust refrigerant to specified amount, then go to step 14.
(Excessive amount of refrigerant.)
No
Replace condenser, or repair and clean condenser fins,
then go to step 14.
0 7 -0 1 -1 1