Mazda CX-7 2007 Workshop Manual page 1133

STEP
5 INSPECT TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (SHORT TO B+
BETWEEN CLIMATE CONTROL UNIT AND
AIR INTAKE ACTUATOR) OR ELSEWHERE
• Disconnect the climate control unit
connector.
• Measure the voltages at the following climate
control unit terminals.
(Auto A/C)
— Terminal K (FRESH motor drive signal)
— Terminal I (RECIRCULATE motor drive
signal)
(Manual A/C)
— Terminal X (FRESH motor drive signal)
— Terminal V (RECIRCULATE motor drive
signal)
• Are voltages approx. 0 V?
6 INSPECT TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (SHORT TO
GROUND BETWEEN CLIMATE CONTROL
UNIT AND AIR INTAKE ACTUATOR) OR
ELSEWHERE
• Turn the ignition switch to the LOCK position.
• Inspect for continuity at the following
terminals between the climate control unit
and ground.
(Auto A/C)
— Terminal K (FRESH motor drive signal)
— Terminal I (RECIRCULATE motor drive
signal)
(Manual A/C)
— Terminal X (FRESH motor drive signal)
— Terminal V (RECIRCULATE motor drive
signal)
• Is there continuity?
7 INSPECT AIR INTAKE LINK
• Inspect the air intake links.
— Is there grease on link?
— Are the links securely and properly
installed?
— Are the links free of obstructions and
hindrances?
• Are the above items normal?
8 INSPECT TO SEE WHETHER MALFUNCTION
IS IN CLIMATE CONTROL UNIT OR AIR
INTAKE DOOR
• Inspect the A/C unit air intake door.
— Is the door free of obstructions, cracks,
and damage?
— Are the doors securely and properly
installed?
• Are the above items normal?
9 CONFIRM THAT MALFUNCTION SYMPTOMS
DO NOT RECUR AFTER REPAIR
• Does the air intake mode change smoothly?
End Of Sie
SYMPTOM TROUBLESHOOTING
INSPECTION
Yes Go to the next step.
No Repair the wiring harness between the climate control unit
and air intake actuator, then go to Step 9.
Yes Repair the wiring harness between the climate control unit
and air intake actuator, then go to Step 9.
No Go to the next step.
Yes Go to the next step.
No Apply grease to the links. If any the links are damaged,
replace the air intake actuator, then go to Step 9.
Yes Replace the climate control unit, then go to the next step.
No Remove obstruction, or install the doors in the proper
position. If any doors are cracked or damaged, replace
them, then go to the next step.
Yes Troubleshooting completed. Explain repairs to customer.
No Recheck malfunction symptoms, then repeat from Step 1 if
the malfunction recurs.
ACTION
07-03–9
07-03