Mazda CX-7 2007 Workshop Manual page 1132

STEP
2* INSPECT TO SEE WHETHER MALFUNCTION
(LACK OF CONTINUITY) IS IN AIR INTAKE
ACTUATOR, WIRING HARNESS (BETWEEN
CLIMATE CONTROL UNIT AND AIR INTAKE
ACTUATOR) OR ELSEWHERE
• Turn the ignition switch to the ON position.
• Measure the voltages at the following climate
control unit terminals.
(Auto A/C)
— Terminal K (24-pin, FRESH motor drive
signal)
— Terminal I (24-pin, RECIRCULATE motor
drive signal)
(See 07-40-13 CLIMATE CONTROL UNIT
INSPECTION [FULL-AUTO AIR
CONDITIONER].)
(Manual A/C)
— Terminal X (24-pin, FRESH motor drive
signal)
— Terminal V (24-pin, RECIRCULATE motor
drive signal)
• Are voltages normal?
3* INSPECT TO SEE WHETHER MALFUNCTION
(LACK OF CONTINUITY) IS IN AIR INTAKE
ACTUATOR OR WIRING HARNESS
(BETWEEN CLIMATE CONTROL UNIT AND
AIR INTAKE ACTUATOR)
• Measure the voltages at the following air
intake actuator terminals.
(Auto A/C / Manual A/C)
— Terminal D (FRESH motor drive signal)
— Terminal F (RECIRCULATE motor drive
signal)
• Are voltages as shown below?
(Auto A/C / Manual A/C)
— Terminal D: approx. 0.5 V during
RECIRCULATE and approx. 10 V during
FRESH
— Terminal F: approx. 10 V during
RECIRCULATE and approx. 0.5 V during
FRESH
4 INSPECT TO SEE WHETHER MALFUNCTION
IS IN AIR INTAKE ACTUATOR OR
ELSEWHERE
• Disconnect the air intake actuator 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)
(See 07-40-13 CLIMATE CONTROL UNIT
INSPECTION [FULL-AUTO AIR
CONDITIONER].)
(Manual A/C)
— Terminal X (FRESH motor drive signal)
— Terminal V (RECIRCULATE motor drive
signal)
• Are voltages normal?
07-03–8
SYMPTOM TROUBLESHOOTING
INSPECTION
Yes Go to the next step.
No Go to Step 4.
Yes Go to Step 7.
No Repair the wiring harness between the climate control unit
and air intake actuator, then go to Step 9.
Yes Inspect the air intake actuator, then go to Step 9.
No Go to the next step.
ACTION