Mazda CX-9 Grand Touring 2008, Руководство пользователя

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8*
BLOWER MOTOR OR ELSEWHERE
z
Measure the voltage at the following blower motor
terminal.
{
Terminal B (blower motor operation signal)
z
Is the voltage approx. 12 V?
Yes Go to the next step.
No
Inspect the front blower motor,
then go to Step 15.
9*
INSPECT TO SEE WHETHER MALFUNCTION IS IN
WIRING HARNESS (OPEN OR SHORT CIRCUIT
BETWEEN FRONT BLOWER MOTOR AND FRONT
POWER MOS FET) OR ELSEWHERE
z
Measure the voltage at the following terminal of front
power MOS FET.
{
Terminal A (blower motor operation signal)
z
Is voltage approx. 12 V?
Yes Go to the next step.
No
Repair the wiring harness
between the front blower
motor and front power MOS
FET, then go to Step 15.
10*
INSPECT TO SEE WHETHER MALFUNCTION IS IN
WIRING HARNESS (OPEN OR SHORT CIRCUIT
BETWEEN FRONT POWER MOS FET AND GROUND)
OR ELSEWHERE
z
Measure the voltage at the following front power MOS
FET terminal.
{
Terminal E (blower motor operation signal)
z
Is the voltage approx. 0 V?
Yes Go to the next step.
No
Repair the wiring harness
between the front power MOS
FET and ground, then go to
Step 15.
11
INSPECT FRONT A/C UNIT
z
Inspect the fan for following:.
{
Is the fan free of interference with the A/C unit
case?
{
Is the fan free of foreign material and
obstruction?
z
Is the fan normal?
Yes Go to the next step.
No
Remove obstruction, repair or
replace the fan and front A/C
unit case, then go to Step 15.
12*
INSPECT TO SEE WHETHER MALFUNCTION IS IN
FRONT POWER MOS FET OR ELSEWHERE
z
Disconnect front power MOS FET connector.
z
Turn the fun switch to 1st position from off.
z
Measure the voltage at the following front power MOS
FET terminal.
{
Terminal B (blower motor control signal)
z
Is voltage approx. 10 V?
Yes
Replace the front power MOS
FET, then go to Step 15.
No Go to the next step.
INSPECT TO SEE WHETHER MALFUNCTION IS IN
WIRING HARNESS (OPEN CIRCUIT BETWEEN
Yes Go to the next step.
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:14:50 AM Page 7 © 2005 Mitchell Repair Information Company, LLC.