NO.7 AMOUNT OF AIR FROM REAR VENTS DOES NOT CHANGE
NO.7 AMOUNT OF AIR FROM REAR VENTS DOES NOT CHANGE DESCRIPTION AND
POSSIBLE CAUSE
8
INSPECT REAR MODE ACTUATOR
z
(See
REAR AIRFLOW MODE ACTUATOR
INSPECTION
.)
z
Is the rear airflow mode actuator normal?
Yes Go to the next step.
No
Replace the rear airflow
mode actuator, then go to
Step 10.
9
INSPECT TO SEE WHETHER MALFUNCTION IS IN
WIRING HARNESS (OPEN, SHORT OR POOR
CONNECTION OF TERMINALS BETWEEN FRONT
AND REAR AIRFLOW MODE ACTUATOR) OR
ELSEWHERE
z
Inspect for open, short or poor connection of terminals
between front and rear airflow mode actuator.
{
Terminal 2P (front climate control unit)- terminal C
(rear airflow mode actuator)
{
Terminal 2B (front climate control unit)- terminal A
(rear airflow mode actuator)
{
Terminal 2D (front climate control unit)- terminal E
(rear airflow mode actuator)
{
Terminal 1N (front climate control unit)- terminal F
(rear airflow mode actuator)
{
Terminal 1L (front climate control unit)- terminal G
(rear airflow mode actuator)
z
Is there any open, short or poor connection of terminals?
Yes
Repair or replace
malfunctioning part, then go
to next step.
No
Replace the front climate
control unit, go to the next
step.
10
VERIFY REPAIR
z
Does air blow from the rear A/C vent mode?
Yes
Troubleshooting completed.
Explain repairs to customer.
No
Recheck malfunction
symptoms, then repeat from
Step 1 if the malfunction
recurs.
7
Amount of air from rear vents does not change
DESCRIPTION
z
Malfunction in rear blower motor system
z
Amount of air blowing rear vents does not change when switching front and/or
rear climate control unit airflow volume control dial.
POSSIBLE
CAUSE
z
Rear A/C unit malfunction
z
Rear blower motor malfunction
z
Rear power MOS FET malfunction
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:14:51 AM
Page 18
© 2005 Mitchell Repair Information Company, LLC.
