Mazda 2002 6 - Page 1220

TROUBLESHOOTING
U–69
U
End Of Sie
3 INSPECT TO SEE WHETHER MALFUNCTION
IS IN AIR INTAKE ACTUATOR OR
ELSEWHERE
• Disconnect air intake actuator connector.
• Test voltages at the following terminals of
climate control unit.
— Terminal 2K (12-pin, FRESH motor drive
signal)
— Terminal 2I (12-pin, RECIRCULATE
motor drive signal)
(See U–47 Full-auto Air Conditioner)
• Are voltages okay?
Yes Inspect air intake actuator, then go to Step 8.
No Go to next step.
4 INSPECT TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (SHORT TO B+
BETWEEN CLIMATE CONTROL UNIT AND
AIR INTAKE ACTUATOR) OR ELSEWHERE
• Disconnect climate control unit connector.
• Test voltages at the following terminals of
climate control unit.
— Terminal 2K (12-pin, FRESH motor drive
signal)
— Terminal 2I (12-pin, RECIRCULATE
motor drive signal)
• Are voltages approximately 0 V?
Yes Go to next step.
No Repair wiring harness between climate control unit and air
intake actuator, then go to Step 8.
5 INSPECT TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (SHORT TO
GROUND BETWEEN CLIMATE CONTROL
UNIT AND AIR INTAKE ACTUATOR) OR
ELSEWHERE
• Turn ignition switch to LOCK position.
• Inspect for continuity at the following
terminals between climate control unit and
ground.
— Terminal 2K (12-pin, FRESH motor drive
signal)
— Terminal 2I (12-pin, RECIRCULATE
motor drive signal)
• Is there continuity?
Yes Repair wiring harness between climate control unit and air
intake actuator, then go to Step 8.
No Go to next step.
6 INSPECT AIR INTAKE LINK
• Inspect air intake links.
— Is there grease on link?
— Are links securely and properly installed?
— Are links free of obstructions and
hindrances?
• Are above items okay?
Yes Go to next step.
No Apply grease to links. If any links are damaged, replace air
intake actuator, then go to Step 8.
7 INSPECT TO SEE WHETHER MALFUNCTION
IS IN CLIMATE CONTROL UNIT OR AIR
INTAKE DOOR
• Inspect blower unit air intake door.
— Is door free of obstructions, cracks, and
damage?
— Are doors securely and properly installed?
• Are above items okay?
Yes Replace climate control unit, then go to next step.
No Remove obstruction, or install doors in proper position. If
any doors are cracked or damaged, replace them, then go
to next step.
8 CONFIRM THAT MALFUNCTION SYMPTOMS
DO NOT RECUR AFTER REPAIR
• Does air intake mode change smoothly?
Yes Troubleshooting completed. Explain repairs to customer.
No Recheck malfunction symptoms, then repeat from Step 1 if
malfunction recurs.
STEP INSPECTION ACTION