Mazda 626 Station Wagon, Руководство по ремонту

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TROUBLESHOOTING
STEP INSPECTION
ACTION
6 CHECK FOR DTCS IN PCM
• Check for DTCs relating to the PCM on-board
diagnostic system.
• Are any DTCs displayed?
— FP, FS, FS(Hi-power)
(See F1-37 DTC TABLE)
— RF Turbo
(See F2-23 DTC INSPECTION)
Yes Go to appropriate inspection procedure.
No
Go to next step.
7 CHECK TO SEE WHETHER MALFUNCTION IS
IN MAGNETIC CLUTCH SYSTEM OR
ELSEWHERE
• Remove A/C relay.
• Turn ignition switch to ON position.
• When A/C relay connector terminals C and D
(on wiring harness side) are shorted, does
magnetic clutch operate?
Yes Undo short, then go to next step.
No Undo short, reconnect A/C relay, then go to Step
22.
8 INSPECT A/C RELAY
• Inspect A/C relay.
• Is it okay?
Yes Reconnect A/C relay, then go to next step.
No Replace A/C relay, then go to Step 25.
*9 CHECK TO SEE WHETHER MALFUNCTION IS
IN A/C AMPLIFIER SYSTEM OR ELSEWHERE
• Turn ignition switch to LOCK position.
• Remove radiator grille.
• Disconnect refrigerant pressure switch.
• Turn ignition switch to ON position.
• Set fan switch to first speed.
• Test voltage at refrigerant pressure switch
connector terminal B (A/C signal) on wiring
harness side.
• Is voltage approximately 12 V when A/C
switch is off and 0 V when it is on?
Yes Go to Step 16.
No Reconnect refrigerant pressure switch, then go to
next step.
10 CHECK TO SEE WHETHER MALFUNCTION
(LACK OF CONTINUITY) IS IN A/C AMPLIFIER
AND WIRING HARNESS (BETWEEN FUSE
BLOCK AND A/C AMPLIFIER) OR
ELSEWHERE
• Turn ignition switch to LOCK position.
• Disconnect A/C amplifier.
• Start engine.
• Turn both A/C switch and fan switch on.
• When A/C amplifier connector terminals B and
C (on wiring harness side) are shorted, does
cool air blow out?
Yes Undo short, then go to next step.
No Undo short, then go to Step 12.
*11 CHECK TO SEE WHETHER MALFUNCTION
(LACK OF CONTINUITY) IS IN A/C AMPLIFIER
OR WIRING HARNESS (BETWEEN FUSE
BLOCK AND A/C AMPLIFIER)
• Turn ignition switch to ON position.
• Test voltage at A/C amplifier connector terminal
A (IG2 signal) on wiring harness side.
• Is voltage approximately 12 V?
Yes
Inspect A/C amplifier, then go to Step 25.
No Repair wiring harness between fuse block and
A/C amplifier, then go to Step 25.
*12 INSPECT WIRING HARNESS BETWEEN
REFRIGERANT PRESSURE SWITCH AND A/C
AMPLIFIER FOR SHORT TO B+
• Turn ignition switch to ON position.
• Test voltage at A/C amplifier connector terminal
B (A/C signal) on wiring harness side.
• Is voltage approximately 12 V?
Yes
Repair wiring harness between refrigerant
pressure switch and A/C amplifier, then go to Step
25.
No
Go to next step.
U -35