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jonjo6782
Member Since: 08 Nov 2022
Location: ireland
Posts: 4
  
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| Non starter after handbrake module replacement |
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Got the handbrake module replaced in my discovery 3 recently, once fitted the vehicle won't start, it is flickering the immobiliser light, an e displayed in the gear indicator (manual) and the hazard lights are flashing. The vehicle has lost communication with the ecu and handbrake module. I have tried plugging the old one back in still no joy. Any ideas???
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 17th Nov 2022 9:45 pm |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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Are the fuses OK? is the bale arm connector latched in properly? all the symptoms you describe are loss of CAN communication to and through the park brake module.
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| 17th Nov 2022 9:55 pm |
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jonjo6782
Member Since: 08 Nov 2022
Location: ireland
Posts: 4
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All fuses checked and are OK, would the new module cause a short circuit and blow the ecu?
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| 18th Nov 2022 9:47 am |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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I've never known it, if there was a short circuit, then a fuse would have blown, if the data lines were somehow shorted, the other connected modules would shut down and recover when the old module was reconnected - you haven't left anything unplugged around the centre console when removing and fitting the release cable have you?
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| 18th Nov 2022 10:00 am |
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jonjo6782
Member Since: 08 Nov 2022
Location: ireland
Posts: 4
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Turns out I plugged the old handbrake module back in and the vehicle started, new one must be a faulty
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| 18th Nov 2022 5:09 pm |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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Or it could be a D4 module, they operate at different CAN speeds....
The CAN identifier size is different, not the speed.
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| 18th Nov 2022 5:19 pm |
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Flack
Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 6313
 
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Have you tried to re-sync the ecu's the epb module is one that is checked for ID before starting.
Flack 
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| 19th Nov 2022 7:00 am |
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jonjo6782
Member Since: 08 Nov 2022
Location: ireland
Posts: 4
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There was no communication with either the epb module or the ecu when it's plugged in
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| 19th Nov 2022 8:47 am |
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