NO.8 AIR FROM FRONT/REAR VENTS NOT COLD ENOUGH
NO.8 AIR FROM FRONT/REAR VENTS NOT COLD ENOUGH DESCRIPTION AND POSSIBLE
CAUSE
10
z
Inspect the fan in rear A/C unit.
{
Is the fan free of interference with the rear
A/C unit case?
{
Is the fan free of foreign material and
obstructions?
z
Is the fan normal?
Yes Go to the next step.
No
Remove obstruction, repair or
replace the fan blower unit case, then
go to Step 13.
11*
INSPECT TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (OPEN CIRCUIT
BETWEEN REAR POWER MOS FET AND
CLIMATE CONTROL UNIT) OR ELSEWHERE
z
Turn the ignition switch to LOCK position.
z
Disconnect the front climate control unit
connector (24-pin).
z
Is there continuity following terminals at harness-
side connector.
{
Terminal D (rear power MOS FET) and
terminal 1T (front climate control unit)
{
Terminal C (rear power MOS FET) and
terminal 1V (front climate control unit)
Yes Replace the rear power MOS FET,
then go to the next step.
No
Repair or replace for open circuit
between the rear power MOS FET
and the front climate control unit,
then go to Step 13.
12
INSPECT TO SEE WHETHER MALFUNCTION
IS IN REAR POWER MOS FET OR ELSEWHERE
z
Is the air discharged from rear vent after replace
the rear power MOS FET?
Yes
Troubleshooting completed. Explain
repairs to customer.
No
Replace the front climate control
unit, then go to the next step.
13
VERIFY REPAIR
z
Is the air discharged from rear vent?
Yes Troubleshooting completed. Explain
repairs to customer.
No
Recheck malfunction symptoms,
then repeat from Step 1 if the
malfunction recurs.
8
Air from front/rear vents not cold enough.
DESCRIPTION
z
Malfunction in A/C basic system
z
Magnetic clutch operates but A/C system malfunctions.
POSSIBLE
z
Drive belt malfunction
z
A/C unit or condenser malfunction
z
Receiver/drier or expansion valve malfunction (valve closes too much)
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:14:51 AM
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