Power Tailgate System Description - Control/Function
Basic Operation
The power tailgate can be opened and closed automatically by operating the driver's power tailgate switch, the inside switch (for close), and the remote.
Auto Open Operational Conditions
The power tailgate can be opened by operating the driver's power tailgate switch, and the remote under the following conditions:
Operational Conditions (In the turn the vehicle to the ON mode (the keyless operations are disabled in the vehicle to the ON mode))
- Tailgate is fully closed.
- The vehicle speed is less than 1.2 mph (2 km/h).
- The transmission range is P.
- Door lock knob switches of all doors are unlocked.
- Closer unit detects the neutral position.
- System is not in fail-safe mode.
- The power supply voltage is 11 V or higher.
Operational Conditions (in the turn the vehicle to the OFF (LOCK) mode)
- Tailgate is fully closed (full-latched position is detected).
- Vehicle OFF (LOCK) mode (keyless operation only).
- The vehicle speed is less than 1.2 mph (2 km/h).
- Door lock knob switches of all doors are unlocked.
- Closer unit detects the neutral position.
- System is not in fail-safe mode.
- The power supply voltage is 11 V or higher.
Auto Close Operational Conditions
The power tailgate can be closed by operating the driver's power tailgate switch, inside tailgate switch, and the remote under the following conditions:
- Tailgate is fully open.
- Closer unit detects the neutral position.
- Pinch sensor detects no obstruction.
- System is not in fail-safe mode.
- The power supply voltage is 11 V or higher.
Operation Stop Conditions
Operation stop occurs in the following conditions:
- During the open operation, and the detected vehicle speed is 1.2 mph (2 km/h) or more.
- During the open or close operation, and the tailgate outer handle switch is ON.
- During the open or close operation, and failsafe is detected. (Except for the power tailgate closer unit failure.)
- During the open or close operation, and the current at the power tailgate motor is 30 A or more for at least 0.5 seconds.
Pinching Detection Control
When something is pinched (hit) during the open/close operation of the power tailgate, pinching is detected and the motor of the drive unit is stopped to reverse the rotation. There are two types of detection methods, the direct detection method and the indirect detection method.
1. Direct Detection Method (Pinch Sensor Detection)
In this method, the change in the internal resistance due to oppression of the pinch sensor during the auto close operation is detected to determine the existence of pinching.
2. Indirect Detection Method
- Pulse detection (Overload detection)
In this method, the change in the pulse width output from the pulse sensor during the auto open/close operation is detected to determine the existence of pinching.
- Current detection
In this method, the change in the load calculated value from the power tailgate motor current during the auto open/close operation is detected to determine the existence of pinching.
Power Tailgate Open/Close Speed Control
The power tailgate open/close speeds are detected from the pulse signals of the pulse sensor and, based on the open/close position of the tailgate, the speed control is carried out to follow the preset target speed.
Fall-down Detection Function
This function prevents the tailgate from suddenly falling down because of an accumulation of snow, or other causes. If the pulse in the drive unit detects abnormal pulses, the tailgate starts to open. If this operation is activated twice, the tailgate will close automatically. If the obstruction detection function detects any obstruction several times during this fall-down detection function, the tailgate stops moving.
Power Tailgate Answer Back Control
Power tailgate causes the turn signal light to blink 4 times by the answerback feature, which is activated by operating the power tailgate button on the remote, or by operating the driver's power tailgate switch.
Beeper Sound Function
The beeper sound function activates the beeper sound when the operation is stopped, pinching is detected, the close operation is performed while the vehicle speed is detected, the auto operation is carried out while the door fall prevention function, etc. There are some beeper sound patterns as shown below.
Warning sound (1)
- When the tailgate starts to open automatically (excluding when operating the tailgate outer handle switch)
- When the tailgate starts to close automatically
Warning sound (2)
- When the reverse operation is started after the tailgate has detected any obstruction.
- When the reverse operation is started by each switch operation.
- When the following stopping conditions are met when auto is operating:
-
- During the open operation, and the vehicle speed is 1.2 mph (2 km/h) or more is detected.
-
- When failsafe is detected. (Except for the power tailgate closer unit failure.)
- When the operating time is over.
- When the following release conditions are met when the power tailgate closer unit is operating:
-
- The pinch sensor ON is detected.
-
- Failsafe of the pinch sensor is detected.
Warning sound (3)
- When the vehicle speed exceeds 1.2 mph (2 km/h) while the tailgate is closing automatically
The beeper sound is stopped when the following conditions are met.
- When the full latch switch OFF and the latchet switch ON is detected.
- Vehicle speed of 1.2 mph (2 km/h) or less is detected.
- Close operation is stopped.
Warning sound (4)
When the tailgate fall-down detection function is activated. (Closing operation when the tailgate fall-down detection function is activated or after second inspection.)
The beeper sound is stopped when the following conditions are met.
- When the full latch switch OFF or the half latch switch OFF is detected.
- Fall-down detection operation is stopped.
Warning sound (5)
When the tailgate is not fully-latched, and the following condition is met: The shift lever is any position other than P, and brake pedal position switch and parking brake switch is OFF, and the vehicle speed exceeds 1.2 mph (2 km/h).
The beeper sound is stopped when the following conditions are met.
- 31 cycle beeper sound is completed.
- Vehicle OFF (LOCK) mode.
- When the full latch switch OFF and the latchet switch ON is detected.
- Vehicle speed is 1.2 mph (2 km/h) or below and the ATP or the foot brake and the parking brake is ON.
Sector Gear Neutral Position Reset Control
The power tailgate closer unit operates normally (within standard) with the neutral switch OFF, so when starting an operation, it resets the sector gear to neutral position.