NO.3 AIR INTAKE MODE FROM FRONT VENT DOES NOT CHANGE
NO.3 AIR INTAKE MODE FROM FRONT VENT 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.
13*
FRONT POWER MOS FET AND FRONT CLIMATE
CONTROL UNIT) OR ELSEWHERE
z
Turn the ignition switch to the LOCK position.
z
Disconnect front climate control unit connector.
z
Inspect for continuity at the following terminals
between the front power MOS FET and front climate
control unit.
{
Terminal F-1R (blower motor control signal)
{
Terminal B-1P (blower motor feedback signal)
z
Is there continuity?
No
Repair the wiring harness
between the front power MOS
FET and climate control unit,
then go to Step 15.
14*
INSPECT TO SEE WHETHER MALFUNCTION IS IN
CLIMATE CONTROL UNIT OR WIRING HARNESS
(SHORT TO GROUND IN WIRING HARNESS
BETWEEN FRONT POWER MOS FET AND FRONT
CLIMATE CONTROL UNIT)
z
Inspect for continuity at the following terminal between
the power MOS FET and ground.
{
Terminal D (blower motor control signal)- ground
z
Is there continuity?
Yes
Repair the wiring harness
between the front power MOS
FET and ground, then go to the
next step.
No
Replace the front climate
control unit, then go to the next
step.
15
VERIFY REPAIR
z
Is air discharged from vent?
Yes
Troubleshooting completed.
Explain repairs to customer.
No
Recheck malfunction
symptoms, then repeat from
Step 1 if the malfunction
recurs.
3
Air intake mode from front vent does not change.
DESCRIPTION
z
Malfunction in A/C unit and/or front climate control unit air intake mode
switching system
z
Air intake mode does not change when switching REC/FRESH mode.
POSSIBLE
CAUSE
z
Air intake actuator malfunction
z
Air intake door malfunction
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:14:50 AM
Page 8
© 2005 Mitchell Repair Information Company, LLC.
