Mazda 626 Station Wagon, Workshop Manual

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TROUBLESHOOTING
STEP INSPECTION ACTION
*21 CHECK TO SEE WHETHER MALFUNCTION
(LACK OF CONTINUITY) IS IN WIRING
HARNESS (BETWEEN A/C RELAY AND PCM)
OR CONDENSER FAN CONTROL SYSTEM
• Turn ignition switch to ON position.
• Turn A/C switch off.
• Test voltage at PCM connector terminal 96
(IG1 signal).
• Is voltage approximately 12 V?
Yes
Inspect condenser fan control system.
(See F1-154 Cooling Fan Control Inspection)
No
Repair wiring harness between A/C relay and
PCM (Terminal 96), then go to Step 25.
22 INSPECT A/C RELAY (SWITCH-SIDE) POWER
SUPPLY FUSE
• Is A/C replay power supply fuse okay?
Yes Go to next step.
No Check for a short to ground on blown fuse’s
circuit.
Repair or replace as necessary.
Install appropriate amperage fuse.
*23 INSPECT WIRING HARNESS BETWEEN FUSE
BLOCK AND A/C RELAY (SWITCH-SIDE) FOR
CONTINUITY
• Turn ignition switch to ON position.
• Test voltage at A/C relay connector terminal C
(A/C control signal).
• Is voltage approximately 12 V?
Yes Go to next step.
No Repair wiring harness between fuse block and
A/C relay, then go to Step 25.
*24 CHECK TO SEE WHETHER MALFUNCTION
(LACK OF CONTINUITY) IS IN MAGNETIC
CLUTCH AND THERMAL PROTECTOR OR
WIRING HARNESS (BETWEEN A/C RELAY
AND MAGNETIC CLUTCH)
• Test voltage at magnetic clutch connector
terminal A (A/C control signal).
• Is voltage approximately 12 V?
Yes Inspect magnetic clutch.
If magnetic clutch is normal:
Replace thermal protector, then go to next step.
If magnetic clutch is malfunctioning:
Replace magnetic clutch, then go to next step.
No Repair wiring harness between A/C relay and
magnetic clutch, then go to next step.
25 CONFIRM THAT MALFUNCTION SYMPTOMS
DO NOT RECUR AFTER REPAIR
• Does cool air blow out? (Is refrigerant system
performance test result correct?)
Yes Troubleshooting completed. Explain repairs to
customer.
No Recheck malfunction symptoms, then repeat from
Step 1 if malfunction recurs.
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