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Discussion Starter #1
Hi, just bought this car from eBay and there's an error with the tailgate.
When you press the button in the door to open it, sometimes it'll open, sometimes it'll open half way then chime three or four times and close and other times it'll unlock, go to open but will just make a whirring sound then lock again without going up.

Suspect it's the motor but any experience/advice welcome?

Thanks
 

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We’ve had this fault crop up before on this forum , do a search of the site.
 
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Discussion Starter #3
We’ve had this fault crop up before on this forum , do a search of the site.
Hi Fred, thanks for the info. I've had a quick look and can't seem to find any threads relating to boot lid travel, more to do with switches or burnt out wiring which I'm not suffering with. Don't suppose you could point me in the right direction could you? thanks a lot!
 

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So your thinking it’s the powered tailgate motor that’s at fault ?
 

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Discussion Starter #5
So your thinking it’s the powered tailgate motor that’s at fault ?
Well, there's obviously power there as the button in the door and in the boot lid works. Sometimes when I press the door button to open it, there's a painful whirring sound when the boot unlocks but it doesn't go up, then will just re-lock down. Other times it'll raise part way then chime and close or will open all the way. Then, when it's open it'll either close all the way or it'll close half way and then go up again as if it's a sensor or something stopping it? It's hard for me to say what I think it is but all I know is there's power...
 

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Ok it’s either the actual actuating lock mechanism for the tailgate or the tailgate powered lift motor.
See if you can hear where the whirring sound is coming from ?
 

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Discussion Starter #7
Ok it’s either the actual actuating lock mechanism for the tailgate or the tailgate powered lift motor.
See if you can hear where the whirring sound is coming from ?
Thanks for the advice Fred, the noise comes from the right hand side as you're looking at the back of the car from the rear (driver side)
 

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It would be worth scanning the module for fault codes,hopefully that would point you in the right direction as to the cause
 
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Discussion Starter #9
It would be worth scanning the module for fault codes,hopefully that would point you in the right direction as to the cause
Hi Valer, thanks for the advice! I scanned the OBD2 port on Sunday and only one code came up - P03A7 which is 'Cylinder 2 pressure variation high' so not related.... thanks
 

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an obd2 reader won't cut it i'm afraid,it needs a late opcom or gds2 to access the tailgate module
 
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It's quite a sophisticated system,here's the info from TIS

Liftgate Description and Operation

The power liftgate system consists of the following components:

• Liftgate module
• Driver door lock/window switch
• Power liftgate mode switch
• Liftgate outside handle release switch
• Liftgate shutface switch
• Liftgate latch assembly
• Liftgate pump motor
• Left and right liftgate object sensors
Operation

The power liftgate can be commanded to function in the following methods:

• An open/close command from the power liftgate mode switch
• An open command from the liftgate outside handle release switch
• A close command from the liftgate shutface switch
• An open request by a signal from the key fob to the remote control door lock receiver

The liftgate module will respond to a request by commanding the liftgate latch to release the liftgate and commanding the liftgate pump motor to activate and pump hydraulic fluid to the liftgate control arm piston raising the liftgate to the open position.

Power Latch
The liftgate control module continuously monitors power liftgate operation and calculates its location and direction of travel from an internal liftgate position sensor. One input returns the position of the liftgate relative to the x-axis and y-axis. The liftgate control module then uses these 2 inputs together to calculate its angle relative to the liftgate. When the liftgate mode switch is in the Garage position, the liftgate module will command the liftgate pump motor and monitor the x-axis and y-axis to stop the liftgate parallel to the vehicle roof.
The latch motor is a bi-directional motor and latch or unlatch operation is the result of the direction of the motor rotation. The liftgate module controls the latch motor through the control circuits by supplying power and ground in the appropriate polarity. The motor control circuits are monitored by the liftgate module prior to activation for a high or low condition and during motor operation for an insufficient current flow condition. The ratchet, pawl, and sector switches are part of the latch motor assembly and are used by the liftgate control module to determine the state of the latch during the process of latching or unlatching. Each of the latch switch signal circuits are supplied battery voltage through a resistor and monitored within the liftgate module. The latch switches share a common low reference circuit from the liftgate module and when the switch contacts close the signal circuit goes low and the liftgate module determines the switch to be active.
The handle switch and close switch are parallel circuits and provide a single input to the liftgate control module. The handle/close switch signal circuit is supplied battery voltage through a resistor and monitored within the liftgate module. The switches share a common low reference circuit from the liftgate module and when the switch contacts close the signal circuit goes low and the liftgate module determines the switch to be active.

Liftgate Pump Motor
The liftgate pump motor is a bi-directional motor and open or close operation is the result of the direction of the motor rotation. The liftgate module controls the liftgate pump motor through the control circuits by supplying power and ground in the appropriate polarity. The motor control circuits are monitored by the liftgate module prior to activation for a high or low condition and during motor operation for any irregular current flow conditions.

Object Detection
The power liftgate system uses an object detection method which consists of object sensors fixed to both sides of the liftgate near the seal area. The object sensors consist of an internal fixed resistor and normally open switch contacts which when closed will bypass the resistor. The signal circuit is supplied 5 volts through a resistor and monitored within the liftgate control module, and during normal power liftgate operation the signal circuit should remain a fixed value. When an object presses one of the sensors the contacts close and the resistor is bypassed causing the signal circuit voltage at the module to go low.
 

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It's quite a sophisticated system,here's the info from TIS

Liftgate Description and Operation

The power liftgate system consists of the following components:

• Liftgate module
• Driver door lock/window switch
• Power liftgate mode switch
• Liftgate outside handle release switch
• Liftgate shutface switch
• Liftgate latch assembly
• Liftgate pump motor
• Left and right liftgate object sensors
Operation

The power liftgate can be commanded to function in the following methods:

• An open/close command from the power liftgate mode switch
• An open command from the liftgate outside handle release switch
• A close command from the liftgate shutface switch
• An open request by a signal from the key fob to the remote control door lock receiver

The liftgate module will respond to a request by commanding the liftgate latch to release the liftgate and commanding the liftgate pump motor to activate and pump hydraulic fluid to the liftgate control arm piston raising the liftgate to the open position.

Power Latch
The liftgate control module continuously monitors power liftgate operation and calculates its location and direction of travel from an internal liftgate position sensor. One input returns the position of the liftgate relative to the x-axis and y-axis. The liftgate control module then uses these 2 inputs together to calculate its angle relative to the liftgate. When the liftgate mode switch is in the Garage position, the liftgate module will command the liftgate pump motor and monitor the x-axis and y-axis to stop the liftgate parallel to the vehicle roof.
The latch motor is a bi-directional motor and latch or unlatch operation is the result of the direction of the motor rotation. The liftgate module controls the latch motor through the control circuits by supplying power and ground in the appropriate polarity. The motor control circuits are monitored by the liftgate module prior to activation for a high or low condition and during motor operation for an insufficient current flow condition. The ratchet, pawl, and sector switches are part of the latch motor assembly and are used by the liftgate control module to determine the state of the latch during the process of latching or unlatching. Each of the latch switch signal circuits are supplied battery voltage through a resistor and monitored within the liftgate module. The latch switches share a common low reference circuit from the liftgate module and when the switch contacts close the signal circuit goes low and the liftgate module determines the switch to be active.
The handle switch and close switch are parallel circuits and provide a single input to the liftgate control module. The handle/close switch signal circuit is supplied battery voltage through a resistor and monitored within the liftgate module. The switches share a common low reference circuit from the liftgate module and when the switch contacts close the signal circuit goes low and the liftgate module determines the switch to be active.

Liftgate Pump Motor
The liftgate pump motor is a bi-directional motor and open or close operation is the result of the direction of the motor rotation. The liftgate module controls the liftgate pump motor through the control circuits by supplying power and ground in the appropriate polarity. The motor control circuits are monitored by the liftgate module prior to activation for a high or low condition and during motor operation for any irregular current flow conditions.

Object Detection
The power liftgate system uses an object detection method which consists of object sensors fixed to both sides of the liftgate near the seal area. The object sensors consist of an internal fixed resistor and normally open switch contacts which when closed will bypass the resistor. The signal circuit is supplied 5 volts through a resistor and monitored within the liftgate control module, and during normal power liftgate operation the signal circuit should remain a fixed value. When an object presses one of the sensors the contacts close and the resistor is bypassed causing the signal circuit voltage at the module to go low.
A short story then , not lol :D
 

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Discussion Starter #14
It's quite a sophisticated system,here's the info from TIS

Liftgate Description and Operation

The power liftgate system consists of the following components:

• Liftgate module
• Driver door lock/window switch
• Power liftgate mode switch
• Liftgate outside handle release switch
• Liftgate shutface switch
• Liftgate latch assembly
• Liftgate pump motor
• Left and right liftgate object sensors
Operation

The power liftgate can be commanded to function in the following methods:

• An open/close command from the power liftgate mode switch
• An open command from the liftgate outside handle release switch
• A close command from the liftgate shutface switch
• An open request by a signal from the key fob to the remote control door lock receiver

The liftgate module will respond to a request by commanding the liftgate latch to release the liftgate and commanding the liftgate pump motor to activate and pump hydraulic fluid to the liftgate control arm piston raising the liftgate to the open position.

Power Latch
The liftgate control module continuously monitors power liftgate operation and calculates its location and direction of travel from an internal liftgate position sensor. One input returns the position of the liftgate relative to the x-axis and y-axis. The liftgate control module then uses these 2 inputs together to calculate its angle relative to the liftgate. When the liftgate mode switch is in the Garage position, the liftgate module will command the liftgate pump motor and monitor the x-axis and y-axis to stop the liftgate parallel to the vehicle roof.
The latch motor is a bi-directional motor and latch or unlatch operation is the result of the direction of the motor rotation. The liftgate module controls the latch motor through the control circuits by supplying power and ground in the appropriate polarity. The motor control circuits are monitored by the liftgate module prior to activation for a high or low condition and during motor operation for an insufficient current flow condition. The ratchet, pawl, and sector switches are part of the latch motor assembly and are used by the liftgate control module to determine the state of the latch during the process of latching or unlatching. Each of the latch switch signal circuits are supplied battery voltage through a resistor and monitored within the liftgate module. The latch switches share a common low reference circuit from the liftgate module and when the switch contacts close the signal circuit goes low and the liftgate module determines the switch to be active.
The handle switch and close switch are parallel circuits and provide a single input to the liftgate control module. The handle/close switch signal circuit is supplied battery voltage through a resistor and monitored within the liftgate module. The switches share a common low reference circuit from the liftgate module and when the switch contacts close the signal circuit goes low and the liftgate module determines the switch to be active.

Liftgate Pump Motor
The liftgate pump motor is a bi-directional motor and open or close operation is the result of the direction of the motor rotation. The liftgate module controls the liftgate pump motor through the control circuits by supplying power and ground in the appropriate polarity. The motor control circuits are monitored by the liftgate module prior to activation for a high or low condition and during motor operation for any irregular current flow conditions.

Object Detection
The power liftgate system uses an object detection method which consists of object sensors fixed to both sides of the liftgate near the seal area. The object sensors consist of an internal fixed resistor and normally open switch contacts which when closed will bypass the resistor. The signal circuit is supplied 5 volts through a resistor and monitored within the liftgate control module, and during normal power liftgate operation the signal circuit should remain a fixed value. When an object presses one of the sensors the contacts close and the resistor is bypassed causing the signal circuit voltage at the module to go low.
I'm doing the 'over my head' hand gesture right now, in case you can't see haha :D I could look into the sensors. What would be ideal is if Vauxhall had some literature on what the error chimes mean! Sometimes it'll chime 3 times and other times 4
 

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I'm doing the 'over my head' hand gesture right now, in case you can't see haha :D I could look into the sensors. What would be ideal is if Vauxhall had some literature on what the error chimes mean! Sometimes it'll chime 3 times and other times 4
That's probably because the tailgate hasn't secured ( locked or unlocked etc )
 
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Have you looked to see if it's possible to check the pump oil level ?
 
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That's the problem,i can't find out much info on it,TIS is woefully short on the subject :whistle:
i think you need someone who's played with one of these systems before
 

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Discussion Starter #20
That's the problem,i can't find out much info on it,TIS is woefully short on the subject :whistle:
i think you need someone who's played with one of these systems before
Fair enough mate, aappreciate your advice!! I'm arranging for a local mobile mech to come take a look at a coolant leak so I'll ask him if he has any experience in this area. When it comes to electrics I get worried about the ££££ :rolleyes:
 
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