Mazda CX-7 2007 Workshop Manual page 1136

STEP
7 INSPECT AIR INTAKE ACTUATOR
• Inspect the air intake actuator.
(See 07-40-10 AIR INTAKE ACTUATOR
INSPECTION.)
• Is it normal?
8 INSPECT AIR INTAKE SELECTOR SWITCH
AND DEFROSTER SWITCH IN CLIMATE
CONTROL UNIT
(Auto A/C)
• Measure the voltage at climate control unit
connector (24-pin) terminals K and I.
(Manual A/C)
• Measure the voltage at climate control unit
connector (24-pin) terminals X and V.
• Is it normal?
*9 INSPECT WIRING HARNESS BETWEEN
CLIMATE CONTROL UNIT AND AIR INTAKE
ACTUATOR FOR CONTINUITY
• Turn the ignition switch to the LOCK position.
• Is there continuity between the following
climate control unit terminals and air intake
actuator terminals?
(Auto A/C)
— Terminal D — Terminal K (FRESH signal)
— Terminal F — Terminal I (RECIRCULATE
signal)
(Manual A/C)
— Terminal D — Terminal X (FRESH signal)
— Terminal F — Terminal V (RECIRCULATE
signal)
*10 INSPECT WIRING HARNESS BETWEEN
CLIMATE CONTROL UNIT AND AIR INTAKE
ACTUATOR FOR SHORT TO GROUND
• Is there continuity between the following
climate control unit terminals and ground?
(Auto A/C)
— Terminal K (FRESH signal)
— Terminal I (RECIRCULATE signal)
(Manual A/C)
— Terminal X (FRESH signal)
— Terminal V (RECIRCULATE signal)
*11 INSPECT WIRING HARNESS BETWEEN
CLIMATE CONTROL UNIT AND AIR INTAKE
ACTUATOR FOR SHORT TO B+
• Turn the ignition switch to the ON position
• Measure the voltage at the following climate
control unit terminals.
(Auto A/C)
— Terminal K (FRESH signal)
— Terminal I (RECIRCULATE signal)
(Manual A/C)
— Terminal X (FRESH signal)
— Terminal V (RECIRCULATE signal)
• Is the voltage approx. 12 V?
12 INSPECT A/C UNIT AIR INTAKE DOOR
• Is there any foreign material or obstruction in
the A/C unit air intake door?
13 VERIFY THAT A/C UNIT AIR INTAKE DOOR
IS POSITIONED SECURELY AND PROPERLY
• Is the A/C unit air intake door securely and
properly positioned?
14 VERIFY THAT MALFUNCTION SYMPTOM
OCCURS AFTER REPAIR
• Does the malfunction disappear?
End Of Sie
07-03–12
SYMPTOM TROUBLESHOOTING
INSPECTION
Yes Go to the next step.
No Replace the air intake actuator, go to Step 14.
Yes Go to the next step.
No Replace the climate control unit, then go to Step 14.
Yes Go to the next step.
No Repair the wiring harness between the climate control unit
and air intake actuator, then go to Step 14.
Yes Repair the wiring harness between the climate control unit
and air intake actuator, then go to Step 14.
No Go to the next step.
Yes Repair the wiring harness between the climate control unit
and air intake actuator, then go to Step 14.
No Replace the climate control unit, then go to Step 14.
Yes Remove obstruction, then go to Step 14.
No Go to the next step.
Yes Inspect the air intake door for cracks or damage, then go to
the next step.
No Install the air intake door securely in the proper position,
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