Author Topic: Bora electrical gremlins  (Read 456 times)

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Offline wsnownz

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Bora electrical gremlins
« on: February 27, 2017, 09:46:16 pm »
I have an intermittent starting issue in a V6 Bora.

When the key is turned to start, everything goes dead (like a flat battery) but hold the key in start position and it will slowly get power and start to crank. The door looks tend to flicker whilst cranking.
Only happens sometimes, other times will start fine. Only trend I have noticed is that if the doors have been open for 5 minutes plus it will definitely act like this.
After a long drive, jump out, lock and walk away, will start fine next time.
Once started runs and drives absolutely fine.

VAG-COM Version: Release 409.1-US


Chassis Type: 1J - VW G/J/B Mk4
Scan: 01,02,03,08,16,15,17,19,22,35,46,56
 
-------------------------------------------------------------------------------
Address 01: Engine
   Controller: 022 906 032 AD
   Component: MOTRONIC ME7.1.1G   0001
   Coding: 0000132
   Shop #: WSC 31414
5 Faults Found:
17925 - Main Relay (J271): Electrical Malfunction
            P1517 - 008 - Implausible Signal - Intermittent
17457 - Bank1: Exhaust Cam Adjustment Valve 1 (N318) Short to Ground
            P1049 - 002 - Lower Limit Exceeded - Intermittent
17935 - Camshaft Timing Adj. Bank1 (N205): Short to Ground
            P1527 - 002 - Lower Limit Exceeded - Intermittent
17949 - Fuel Pump Relay (J17): Open Circuit
            P1541 - 004 - No Signal/Communication - Intermittent
17923 - Intake Manifold Valve (N156): Short to Ground
            P1515 - 002 - Lower Limit Exceeded - Intermittent
Readiness: 0110 1101

-------------------------------------------------------------------------------
Address 08: Auto HVAC
   Controller: 3B1 907 044 C
   Component: CLIMATRONIC     C 2.0.0
   Coding: 11100
   Shop #: WSC 31414
1 Fault Found:
00532 - Supply Voltage B+
            07-00 - Signal too Low

-------------------------------------------------------------------------------
Address 17: Instruments
   Controller: 1J5 920 826 A
   Component: KOMBI+WEGFAHRSP VDO V13
   Coding: 05724
   Shop #: WSC 00000
   WVWZZZ1JZ3D012506     VWZ7Z0B5981240
1 Fault Found:
01177 - Engine Control Unit
            64-10 - Not Currently Testable - Intermittent

-------------------------------------------------------------------------------
Address 46: Central Conv.
   Controller: 1C0 959 799 C
   Component: 2C Komfortgerát HLO 0003
   Coding: 00259
   Shop #: WSC 31414
4 Faults Found:
01331 - Door Control Module: Driver Side (J386)
            53-00 - Supply Voltage Too Low
01332 - Door Control Module: Passenger Side (J387)
            53-10 - Supply Voltage Too Low - Intermittent
01333 - Door Control Module: Rear Left (J388)
            53-10 - Supply Voltage Too Low - Intermittent
01334 - Door Control Module: Rear Right (J398)
            53-00 - Supply Voltage Too Low


Offline Worms

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Re: Bora electrical gremlins
« Reply #1 on: February 27, 2017, 10:23:28 pm »
Are your battery terminals clean and tight?

Offline wsnownz

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Re: Bora electrical gremlins
« Reply #2 on: February 28, 2017, 09:55:47 am »
Yes have checked all the basics including most ground points.

Offline the phantom

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Re: Bora electrical gremlins
« Reply #3 on: February 28, 2017, 12:33:38 pm »
have you cleaned the fuse connections on top of the battery?
Land Transport New Zealand, taking the fun out of driving since August 2008

Offline wsnownz

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Re: Bora electrical gremlins
« Reply #4 on: February 28, 2017, 12:44:31 pm »
Haven't cleaned them, no, but have checked all the fuses.

Offline Filx

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Re: Bora electrical gremlins
« Reply #5 on: February 28, 2017, 01:50:39 pm »
I think maybe replace that engine relay.
FAIL - First Attempt In Learning

Offline wsnownz

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Re: Bora electrical gremlins
« Reply #6 on: February 28, 2017, 02:26:54 pm »
The J271? Done that

Offline the phantom

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Re: Bora electrical gremlins
« Reply #7 on: February 28, 2017, 02:36:44 pm »
Haven't cleaned them, no, but have checked all the fuses.

the MK4 guru at Tristram says the fuse connections corrode unseen, so even if it's not the problem it's worth doing anyway = key word FIRE!
Land Transport New Zealand, taking the fun out of driving since August 2008

Offline Filx

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Re: Bora electrical gremlins
« Reply #8 on: February 28, 2017, 06:03:38 pm »
How about the battery itself? Maybe that's on the way out or there is some sort of charging issue? Long shot maybe but could be worth testing the cranking voltage in the poor start scenarios, or swap to a known good battery when the issue arises to see if that helps. And also possibly alternator output could be worth a look as well.
FAIL - First Attempt In Learning

Offline wsnownz

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Re: Bora electrical gremlins
« Reply #9 on: February 28, 2017, 09:25:50 pm »
Battery is near new and 100% healthy so charging system must be good too.

Offline wsnownz

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Re: Bora electrical gremlins
« Reply #10 on: March 03, 2017, 11:31:04 am »
In the past couple of weeks I've replaced a door lock module, cleaned a corroded door loom connector, and re-wired the boot loom. Along with other general fault finding. In that time the battery has died.

Got it tested yesterday by the AA when it wouldn't start. Had dropped a cell.
Turns out it was too small for the car. 500cca instead of 600+

New battery in and all is well, touch wood.