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June 2013
Electrical Systems Operation & Diagnosis Module (602)
PRG Auto Closer Opening
When the PRG power gate auto closer assembly is commanded to open, the driven gear will
be turning counter-clockwise (as viewed in image 193). The gear will move as far as possible,
creating a spike in amperage.
NOTE: The spring force created by the weather stripping of the PRG places a preload
on the latch assembly. Additional amperage flow through the motor is required
to overcome this preload and assure the unlocking and opening function is
performed.
During that time, the mechanical latch assembly will be released and the gate should be traveling
upward. Approximately 1 second later, the polarity at the power gate auto closer motor will be
reversed. The driven gear will turn clockwise, (as viewed in image 193), until the arm of the sector
switch is resting on the white plastic detent of the latch assembly driven gear. Very little amperage
is required to turn the gear due to no resistance being placed on the PRG.
PRG Auto Closer Voltage and Amperage
PRG Auto Closer Closing
As the PRG power gate auto closer assembly contacts the gate striker, the courtesy and latch
switch close. The PRG control unit combines this information with the low pulse count of the PRG
drive unit motor and activates the power gate auto closer motor.
When the PRG power gate auto closer assembly is closing, the driven gear will be turning clockwise
as viewed in image 193). The gear will move as far as possible, creating a spike in amperage.
The spring force created by the weather stripping applies resistance against the gate closing,
therefore the amperage of the motor increases. When the motor reaches a certain amperage value,
the PRG control unit will reverse the polarity and motor the reverses. The motor will continue to
operate until the arm of the sector switch is resting against the white plastic detent of the latch
of the driven gear.
203
Opening Closing
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