Mazda CX-7 2007 Workshop Manual page 1404

SYMPTOM TROUBLESHOOTING [POWER WINDOW SYSTEMS (AUTO-OPEN/
Diagnostic procedure
STEP
1 INSPECT WHETHER POWER WINDOW
SWITCH ENTERS FAIL-SAFE MODE OR NOT
• Did the door glass move up or down in
automatic mode?
2 VERIFY WHETHER MALFUNCTION IS IN
WIRING HARNESS (BETWEEN POWER
WINDOW SWITCH AND FRONT POWER
WINDOW MOTOR) OR ELSEWHERE
• Turn the ignition switch to the ON position.
• Inspect the voltage at the following front
power window switch terminals (sensor 1
signal):
— Driver's side (at main switch): 2C
— Passenger's side (at sub-switch): J
• Does the voltage alternate between 0 V and
approx. 12 V when the door glass is moving
up and down?
3 VERIFY SENSOR 1 OUTPUT SIGNAL
• Turn the ignition switch to the ON position.
• Inspect the voltage at the following front
power window motor terminals (sensor 1
signal):
— Driver's side: A
— Passenger's side: A
• Is the voltage alternate between 0 V and
approx. 12 V when the door glass is moving
up and down in manual mode?
4 INSPECT WIRING HARNESS BETWEEN
POWER WINDOW SWITCH AND POWER
WINDOW MOTOR FOR CONTINUITY
• Turn the ignition switch to the LOCK position.
• Disconnect the power window switch
connector.
• Is there continuity between the following
front power window switch terminals and
front power window motor terminals?
— Driver's side (at main switch— power
window motor):
• 2C— A (sensor 1 signal)
• 2B— D (sensor power supply)
• 2A— C (ground signal)
— Except driver's side (at sub-switch—
power window motor):
• J— A (sensor 1 signal)
• B— D (sensor power supply)
• D— C (ground signal)
5 VERIFY WHETHER MALFUNCTION IS IN
WIRING HARNESS (BETWEEN POWER
WINDOW SWITCH AND POWER WINDOW
MOTOR) OR POWER WINDOW SWITCH
• Turn the ignition switch to the ON position.
• Inspect the voltage at the following power
window switch terminals:
— Driver's side (at main switch)
• 2C (sensor 1 signal)
• 2A (ground signal)
— Passenger's side (at sub-switch)
• C (sensor 1 signal)
• I (ground signal)
• Is the voltage approx. 12 V?
09-03A–8
CLOSE FUNCTION)]
INSPECTION
Yes Reinspect malfunction symptoms.
No Go to the next step. (Power window switch may enter fail-
safe mode.)
Yes Go to Step 7.
No Go to the next step.
Yes Go to the next step.
No Replace the power window motor, then go to Step 12.
Yes Go to the next step.
No Repair the wiring harness between the power window
switch and power window motor, then go to Step 12.
Yes Repair the wiring harness between the suspect power
window switch and power window motor, then go to Step
12.
No Replace the suspect power window switch (open circuit or
short to power supply in power window switch).
ACTION