2006 LR3 Christmas tree - dark instrument panel - then dead

obsteve

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I just had a frightening thing happen at night on a busy freeway- The dash did its Christmas tree of warnings on the instrument panel (before it went completely dark...) Transmission fault indications... then it just died. After I took it to a shop and they pronounced it fine - good charging system, good battery no codes that pointed to anything in particular - I monitored the battery voltage using my IIDTool on the freeway home and watched the voltage stay true at 13.9 for over two hours, then it died (with the instrument panel going dark again) and I noticed the voltage read 7.9v. By the time I got a friend to jump me the battery read 11.8 and it started right up, showed 13.9 again and then died a few blocks later.
I took the battery in to be tested thinking some cells were shorting out and it tested fine. Before it died I ran a fault test and got this
L319 - LR3 2006
Vehicle scanned on 24-11-2021 18:08
Using IIDTool BT V4.0 B2742

Airbag

  • B1A00-16 (2C) Control module - General electrical failure - circuit voltage below threshold
    ( on 24-11-2021 18:55:24 at 156107 mi )
Body Control

  • B1B01-87 (2E) Key transponder - Bus signal/message failure - missing a message
    ( on 24-11-2021 17:59:39 at 156107 mi )
  • B1B02-28 (2F) Low frequency coil - General signal failure - signal bias level is out of range/zero adjustment failure
    ( on 24-11-2021 20:10:24 at 156107 mi )
  • B1C15-3A (2F) Passenger's up/down mirror motor feedback circuit - Frequency modulation/pulse width modulation failure - incorrect, has too many pulses
    ( on 24-11-2021 20:10:25 at 156107 mi )
  • B1C16-3A (2F) Passenger's left/right mirror motor feedback circuit - Frequency modulation/pulse width modulation failure - incorrect, has too many pulses
    ( on 24-11-2021 20:10:25 at 156107 mi )
  • B1C44-67 (2F) Rear wiper park position switch - Algorithm based failure - signal is incorrect after the event
    ( on 24-11-2021 20:10:33 at 156107 mi )
  • B1C57-14 (6C) Passive start ignition relay coil circuit - General electrical failure - circuit short to ground or open
    ( on 24-11-2021 17:59:37 at 156107 mi )
  • B1D12-15 (2E) Volumetric alarm power circuit - General electrical failure - circuit short to battery or open
    ( on 24-11-2021 17:59:39 at 156107 mi )
  • U0155-87 (2E) LCD Gauge Communication Lost - Bus signal/message failure - missing a message
    ( on 24-11-2021 19:01:02 at 156107 mi )
  • U2001-68 (28) Reduced system function - Algorithm based failure - event information
    ( on 24-11-2021 18:55:59 at 156107 mi )
Engine Petrol

  • U0167-00 (68) Lost communication with vehicle immobiliser control module
Instrument Pack

  • U0159-87 (2E) Lost communication with parking assist control module - Bus signal/message failure - missing a message
  • U0138-87 (2C) Lost communication with all terrain control module - Bus signal/message failure - missing a message
  • U0184-87 (2F) Lost communication with audio unit - Bus signal/message failure - missing a message
  • B1A87-68 (2C) Battery disconnection/electronic control unit reset - Algorithm based failure - event information
Parking Brake

  • C1A00-16 (A8) Control module - General electrical failure - circuit voltage below threshold
    ( on 24-11-2021 18:55:50 at 156107 mi )
Steering Angle

  • U0300-55 (2C) Internal control module software incompatibility - System programming failure - is not configured
    ( on 24-11-2021 18:56:34 at 156107 mi )
Transfer Case

  • P0562-00 (2C) System voltage low
    ( on 25-10-2019 00:26:27 at 0 mi )
Transmission

  • P0561-00 (AC) System voltage unstable
    ( on 24-11-2021 18:55:35 at 156107 mi )
  • P0501-00 (2C) Vehicle speed sensor A range/performance
    ( on 24-11-2021 18:57:15 at 156107 mi )
Vehicle Dynamic

  • C1A00-1C (08) Control module - General electrical failure - circuit voltage out of range
    ( on 24-11-2021 20:12:36 at 156108 mi )
Ventilation

  • B1B70-88 (28) Local interconnection network bus circuit 2 - Bus signal/message failure - bus is off
    ( on 24-11-2021 18:57:58 at 156107 mi )
  • B1B74-00 (6C) Front foot-defrost mode stepper actuator
  • B1B75-00 (2C) Front foot-face mode stepper actuator
  • B1B76-00 (2C) Front left air blend stepper actuator
    ( on 24-11-2021 18:56:50 at 156107 mi )
  • B1B77-00 (2C) Front right air blend stepper actuator
    ( on 24-11-2021 18:56:41 at 156107 mi )
  • B1B82-00 (2C) Rear air distribution stepper actuator
    ( on 24-11-2021 18:56:42 at 156107 mi )
  • B1B83-00 (2C) Rear air blend stepper actuator
    ( on 24-11-2021 18:56:43 at 156107 mi )
Any ideas?
 

Houm_WA

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Was the GAP tool plugged in when this happened, then?
 

Bruno

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Mmm, had something similar going on a few years ago ("randomly" in crash mode), not stupid to check the temperature of the dash itself when the IP does or doesn't go black. I wrote down my findings and fix on another forum but if the temperature seems to be an issue, I will gladly try to help you by re-posting the whole shabam.
A Flir or thermal leak detector should be a standard tool, saved me 1000+ euro stealermoney :)
Better measurement = better diagnosis
 

obsteve

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Was the GAP tool plugged in when this happened, then?
Yes, I was watching a number of things including the battery. The batt voltage was 13.9v until it wasn’t. After it died I saw it at 7.9v. After the shop looked it over pronouncing the charging system and battery fine I drove it another two hours on the freeway only to have it die again - same thing 13.9v to 7.Xv. Only a few minutes later I checked it with a multimeter and read 11.8v. I took the battery to a Napa auto and had it checked. They said it was good to go.
Should the IID show 13.9 all the time? Or does a voltage regulator change the charging voltage while driving?
 

Houm_WA

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I had something similar happen to me a few months ago. I had a suspension fault I was looking into with the GAP and it basically went bonkers. A hard reset set it straight but the kabillion communication faults were present after.

In the past I've had transient faults occur right when I plugged in the IIDTOOL with the engine running.

I'm no Electrical Engineer but I'd theorize that if the battery was already weakened and then the GAP tool was plugged in and drawing current maybe it could cause the LR3 to start load shedding and these interesting errors can happen.

I wouldn't drive around with the GAP tool plugged in.
 

obsteve

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Sounds good. So much of this truck is black magic. I feel like I need to perform an exorcism, sage the thing and knock on wood every time I leave the house...
 

tracyc

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Have you checked the battery cables/connections and the big fusible link on the positive cable? Intermittent loss of power via the cables or fusible link would be my guess
 

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