NO.2 AMOUNT OF AIR BLOWN FROM FRONT VENTS DOES NOT CHANGE
NO.2 AMOUNT OF AIR BLOWN FROM FRONT VENTS DOES NOT CHANGE DESCRIPTION
AND POSSIBLE CAUSE
z
When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors
while doing the inspection to discover whether poor contact points are the cause of any intermittent
malfunctions. If there is a problem, inspect to make sure connectors, terminals and wiring harness are
connected correctly and undamaged.
DIAGNOSTIC PROCEDURE
NO.2 AMOUNT OF AIR BLOWN FROM FRONT VENTS DOES NOT CHANGE DIAGNOSTIC
PROCEDURE
9
VERIFY REPAIR
z
Does air blow out?
Yes
Troubleshooting completed. Explain
repairs to customer.
No
Recheck malfunction symptoms, then
repeat from Step 1 if the malfunction
recurs.
2
Amount of air blown from front vents does not change.
DESCRIPTION
z
Malfunction in front blower system
z
Amount of air blown front vents does not change when switching front climate
control unit airflow control dial.
POSSIBLE
CAUSE
z
Front A/C unit malfunction
z
Front blower motor malfunction
z
Malfunction in front power MOS FET system
z
Front climate control unit malfunction
STEP
INSPECTION
ACTION
1
INSPECT HEATER BLOWER 40 A FUSE
z
Is it normal?
Yes Go to the next step.
No
Replace the fuse, then go to
Step 15. If the fuse burns out
immediately, go to the next
step.
2
INSPECT TO SEE WHETHER MALFUNCTION IS IN
A/C UNIT OR ELSEWHERE
z
Turn the ignition switch to the ON position.
z
Turn the fan switch to ON position.
z
Recirculate air inside the vehicle.
z
Does the front blower motor operate normal speed?
Yes Go to the next step.
No
Go to Step 4.
Yes Remove obstruction, then go to
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:14:50 AM
Page 5
© 2005 Mitchell Repair Information Company, LLC.
