Mazda CX-9 2007 Service Highlights page 390

POWER LIFTGATE (PLG) TOUCH SENSOR CONSTRUCTION/OPERATION
• The PLG touch sensors are installed on the left
and right sides of the liftgate.
• If pressure is applied to the sensor area, the
resistance in the sensor area changes. This
change in resistance is detected by the PLG
control module and it is determined that an object
is obstructing.
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POWER LIFTGATE (PLG) CONTROL MODULE FUNCTION
• A fail-safe function is adopted which reverses the operation or stops it if an abnormal signal is detected from
any part.
• A self-diagnostic function has been adopted which can verify the failed parts and malfunction.
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POWER LIFTGATE (PLG) CONTROL MODULE CONSTRUCTION/OPERATION
Fail-safe Function
• The PLG control module monitors each input/output part, and if a malfunction is detected, performs the
following actions.
Item Detection Condition
• Pulse signal A fixed at high or low
is detected
Rotation
• Pulse signal B fixed at high or low
sensor
is detected
malfunctio
• Abnormal pulse count detected
n
• Reverse direction pulse detected
for operation direction
After auto open operation or
Damper emergency stop (Clutch off), a
damage sudden pulse in the close direction is
detected
PLG
motor
Over-current in PLG motor
over-
current
• Switch is operated continuously
Continuou
• Continuous obstruction detected
s reverse
PLG
motor PLG motor GND fault detection
failure
ECU
PLG motor FET ON fault detection
failure
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ON-BOAD DIAGNOSTIC OUTLINE
• Self-diagnosis functions include the failure detection that comprehensively detects the failure of PLG system-
related parts, and memory function that memorizes the detected failure, and the data monitor function that
retrieves a particular input and output signal.
• You can retrieve and delete service codes and monitor data by using Mazda Modular Diagnostic System (M-
MDS).
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09-11–10
DOORS AND LIFTGATE
PLG TOUCH
SENSOR (LH)
Action after detection
Auto operation stop (Clutch off)
Auto close operation
Auto operation stop (Clutch off)
Auto operation stop (Clutch off)
Auto operation stop (Clutch off)
Auto operation stop (Clutch off)
id091100104400
PLG TOUCH
SENSOR (RH)
ac9uun00000166
id091100103700
id091100104500
Auto operation return
Liftgate closed
Liftgate closed
Liftgate closed or open
Liftgate closed or open
Liftgate fully closed
Liftgate fully closed
id091100104800