Multiple ECU's shut down and rebooted whilst driving

[BushDisco]

As the title suggests I was driving today and on 3 occasions several of the Disco 4 systems shut down, were off line for half a minute or so and then slowly came back on line as they rebooted. From what I observed this included the entertainment unit, the climate control system, camera feeds and several feeds to the LCD dash display. Its most likely that others also rebooted however this was not observable whilst driving.

The car drove with out issue, accelarating, cruising and braking as normal. I experienced the first reboot 3 minutes into a 20 minute drive, I then parked whilst I did some other activities, 2 hours later I drove home and had 2 further reboots, roughly 3 and 5 minutes into the return journey.

On returning home I left the car running and plugged in my IID for a ECU fault scan. It lit up like a christmas tree with the faults below. I then emailed them to myself, cleared the faultts and scanned again. Only 2 faults remain and I suspect if I restart the car in the morning they may also be gone.

I then put the car on charge and its currently charging. Battery was between 13.2 and 14.5 whilst driving (shown on the dash - IID feature), but the main battery is now over 7 years old so could be on its way out, second battery is only 2 years old and I have a full Traxide charge system.

Has anyone experienced anything similar and can offer advise? I'm happy to find a replacement battery if that is the root cause. Its not rained in a while in Melbourne where I live and I havent washed the car in a while so I dont think the ECU's are wet. Engine bay I keep clean and tidy but never jet wash. Disco has done 268k so not high milage for an MY12 HSE.

Thoughts?

Full lilisof faults prior to clearing:



VIN SALLAAAF3CA600861
Model L319 - Discovery 4 2012
Vehicle scanned on 8 Mar 2025 6:35:46 pm
IIDControl 4.2.8 Build 165 Android - IIDTool BT V3.0 B2803


ABS-Brake Module


U0421-68 - Invalid data received from ride level control module - Algorithm based failure - event information (28)
( on 03-10-2024 15:56:41 at 162409 mi )


ACM-Audio System


U2100-00 - Initial configuration is not complete (2B)


BCM-Body Control


B1B01-87 - Key transponder - Bus signal/message failure - missing a message (28)


U0155-00 - LCD Gauge Communication Lost (2A)
( on 08-03-2025 18:23:43 )


U0164-00 - Lost communication with heating ventilation and air conditioning control module (2A)
( on 08-03-2025 18:23:43 )


U0242-00 - Lost communication with the headlamp control module B (2A)
( on 08-03-2025 18:17:01 )


U0184-00 - Lost communication with audio unit (2A)
( on 08-03-2025 18:18:11 at 165962 mi )


U0214-00 - Lost communication with the remote function actuation (2A)
( on 08-03-2025 18:23:51 )


U0199-00 - Lost communication with the door control module A (2A)
( on 08-03-2025 18:22:32 )


U0200-00 - Lost communication with the door control module B (2A)
( on 08-03-2025 18:22:32 )


U0208-00 - Lost communication with the seat control module A (2A)
( on 08-03-2025 18:22:32 )


U025D-00 - Lost communication with front controls interface module B (2A)
( on 08-03-2025 18:18:11 at 165962 mi )


U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (2A)


U0018-00 - Medium speed CAN communication bus (–) shorted to bus (+) (2A)
( on 16-02-2025 13:54:47 )


DDM-Driver Door


B1164-15 - Right mirror heater output - General electrical failure - circuit short to battery or open (68)
( on 15-02-2025 07:14:26 at 165455 mi )


U0140-00 - Lost communication with body control module (2A)
( on 16-02-2025 13:25:05 at 165536 mi )


DSM-Driver Seat


U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (28)


U0140-00 - Lost communication with body control module (2A)
( on 24-11-2024 16:15:40 at 164106 mi )


U0199-00 - Lost communication with the door control module A (2A)
( on 15-09-2024 15:09:57 at 161954 mi )


FCDIM-Front Control


U0010-00 - Medium speed CAN communication bus (28)
( on 25-02-2025 12:56:35 at 165799 mi )


U0140-00 - Lost communication with body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )


U0155-00 - LCD Gauge Communication Lost (2A)
( on 08-03-2025 18:17:05 )


U0300-00 - Internal control module software incompatibility (28)
( on 23-06-2025 22:50:51 at 0 mi )


B1D21-13 - Remote control switch - General electrical failure - circuit open (2B)
( on 02-06-2024 11:45:31 at 160633 mi )


FCIM-HVAC Buttons


U0164-00 - Lost communication with heating ventilation and air conditioning control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )


U0424-68 - Invalid data received from heating, ventilation and air conditioning control module - Algorithm based failure - event information (2A)
( on 08-03-2025 15:51:35 at 165950 mi )


FCIMB-Audio Buttons


U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (28)
( on 25-02-2025 12:56:35 at 165799 mi )


U0256-00 - Lost communication with the front controls interface module (2A)
( on 05-03-2025 12:07:44 )


HCMB-Headlamp


B1286-98 - Interior mirror - Component failure - component or system is over temperature (28)
( on 08-01-2025 17:06:49 at 164545 mi )


U0140-00 - Lost communication with body control module (2A)
( on 08-10-2024 18:32:38 at 162903 mi )


HVAC-Ventilation


U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (2A)
( on 08-03-2025 15:51:35 at 165950 mi )


U0140-87 - Lost communication with body control module - Bus signal/message failure - missing a message (2A)
( on 16-02-2025 13:53:52 at 165536 mi )


U0422-86 - Invalid data received from the body control module - Bus signal/message failure - signal is invalid (2B)
( on 01-06-2024 17:55:23 at 160633 mi )


U3000-55 - Control module - System programming failure - is not configured (2B)
( on 01-06-2024 17:55:23 at 160633 mi )


IPC-Instrument Pack


U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (68)


U0140-00 - Lost communication with body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )


U0184-00 - Lost communication with audio unit (2A)
( on 24-11-2024 16:15:38 at 164106 mi )


U025D-00 - Lost communication with front controls interface module B (2A)


U3000-87 - Control module - Bus signal/message failure - missing a message (2A)


KVM-Keyless


U0140-00 - Lost communication with body control module (2A)
( on 25-02-2025 12:56:35 at 165799 mi )


PAM-Parking Aid


U0140-00 - Lost communication with body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )


U0422-00 - Invalid data received from the body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )


PBM-Parking Brake


U2002-01 - Switch general electrical failure - General failure information - general electrical failure (28)
( on 14-02-2025 20:13:36 at 165387 mi )


PDM-Passenger Door


B1163-15 - Left mirror heater output - General electrical failure - circuit short to battery or open (68)
( on 15-02-2025 07:14:26 at 165455 mi )


U0140-00 - Lost communication with body control module (2A)
( on 16-02-2025 13:24:45 at 165536 mi )



Post clearing faults only 2 remained:



VIN SALLAAAF3CA600861
Model L319 - Discovery 4 2012
Vehicle scanned on 8 Mar 2025 6:36:52 pm
IIDControl 4.2.8 Build 165 Android - IIDTool BT V3.0 B2803


HVAC-Ventilation


U0422-86 - Invalid data received from the body control module - Bus signal/message failure - signal is invalid (2B)
( on 08-03-2025 18:36:10 at 165968 mi )


U3000-55 - Control module - System programming failure - is not configured (2B)
( on 08-03-2025 18:36:10 at 165968 mi )








VIN SALLAAAF3CA600861
Model L319 - Discovery 4 2012
Vehicle scanned on 8 Mar 2025 6:35:46 pm
IIDControl 4.2.8 Build 165 Android - IIDTool BT V3.0 B2803

ABS-Brake Module

U0421-68 - Invalid data received from ride level control module - Algorithm based failure - event information (28)
( on 03-10-2024 15:56:41 at 162409 mi )

ACM-Audio System

U2100-00 - Initial configuration is not complete (2B)

BCM-Body Control

B1B01-87 - Key transponder - Bus signal/message failure - missing a message (28)

U0155-00 - LCD Gauge Communication Lost (2A)
( on 08-03-2025 18:23:43 )

U0164-00 - Lost communication with heating ventilation and air conditioning control module (2A)
( on 08-03-2025 18:23:43 )

U0242-00 - Lost communication with the headlamp control module B (2A)
( on 08-03-2025 18:17:01 )

U0184-00 - Lost communication with audio unit (2A)
( on 08-03-2025 18:18:11 at 165962 mi )

U0214-00 - Lost communication with the remote function actuation (2A)
( on 08-03-2025 18:23:51 )

U0199-00 - Lost communication with the door control module A (2A)
( on 08-03-2025 18:22:32 )

U0200-00 - Lost communication with the door control module B (2A)
( on 08-03-2025 18:22:32 )

U0208-00 - Lost communication with the seat control module A (2A)
( on 08-03-2025 18:22:32 )

U025D-00 - Lost communication with front controls interface module B (2A)
( on 08-03-2025 18:18:11 at 165962 mi )

U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (2A)

U0018-00 - Medium speed CAN communication bus (–) shorted to bus (+) (2A)
( on 16-02-2025 13:54:47 )

DDM-Driver Door

B1164-15 - Right mirror heater output - General electrical failure - circuit short to battery or open (68)
( on 15-02-2025 07:14:26 at 165455 mi )

U0140-00 - Lost communication with body control module (2A)
( on 16-02-2025 13:25:05 at 165536 mi )

DSM-Driver Seat

U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (28)

U0140-00 - Lost communication with body control module (2A)
( on 24-11-2024 16:15:40 at 164106 mi )

U0199-00 - Lost communication with the door control module A (2A)
( on 15-09-2024 15:09:57 at 161954 mi )

FCDIM-Front Control

U0010-00 - Medium speed CAN communication bus (28)
( on 25-02-2025 12:56:35 at 165799 mi )

U0140-00 - Lost communication with body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

U0155-00 - LCD Gauge Communication Lost (2A)
( on 08-03-2025 18:17:05 )

U0300-00 - Internal control module software incompatibility (28)
( on 23-06-2025 22:50:51 at 0 mi )

B1D21-13 - Remote control switch - General electrical failure - circuit open (2B)
( on 02-06-2024 11:45:31 at 160633 mi )

FCIM-HVAC Buttons

U0164-00 - Lost communication with heating ventilation and air conditioning control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

U0424-68 - Invalid data received from heating, ventilation and air conditioning control module - Algorithm based failure - event information (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

FCIMB-Audio Buttons

U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (28)
( on 25-02-2025 12:56:35 at 165799 mi )

U0256-00 - Lost communication with the front controls interface module (2A)
( on 05-03-2025 12:07:44 )

HCMB-Headlamp

B1286-98 - Interior mirror - Component failure - component or system is over temperature (28)
( on 08-01-2025 17:06:49 at 164545 mi )

U0140-00 - Lost communication with body control module (2A)
( on 08-10-2024 18:32:38 at 162903 mi )

HVAC-Ventilation

U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

U0140-87 - Lost communication with body control module - Bus signal/message failure - missing a message (2A)
( on 16-02-2025 13:53:52 at 165536 mi )

U0422-86 - Invalid data received from the body control module - Bus signal/message failure - signal is invalid (2B)
( on 01-06-2024 17:55:23 at 160633 mi )

U3000-55 - Control module - System programming failure - is not configured (2B)
( on 01-06-2024 17:55:23 at 160633 mi )

IPC-Instrument Pack

U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (68)

U0140-00 - Lost communication with body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

U0184-00 - Lost communication with audio unit (2A)
( on 24-11-2024 16:15:38 at 164106 mi )

U025D-00 - Lost communication with front controls interface module B (2A)

U3000-87 - Control module - Bus signal/message failure - missing a message (2A)

KVM-Keyless

U0140-00 - Lost communication with body control module (2A)
( on 25-02-2025 12:56:35 at 165799 mi )

PAM-Parking Aid

U0140-00 - Lost communication with body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

U0422-00 - Invalid data received from the body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

PBM-Parking Brake

U2002-01 - Switch general electrical failure - General failure information - general electrical failure (28)
( on 14-02-2025 20:13:36 at 165387 mi )

PDM-Passenger Door

B1163-15 - Left mirror heater output - General electrical failure - circuit short to battery or open (68)
( on 15-02-2025 07:14:26 at 165455 mi )

U0140-00 - Lost communication with body control module (2A)
( on 16-02-2025 13:24:45 at 165536 mi )











VIN SALLAAAF3CA600861
Model L319 - Discovery 4 2012
Vehicle scanned on 8 Mar 2025 6:35:46 pm
IIDControl 4.2.8 Build 165 Android - IIDTool BT V3.0 B2803

ABS-Brake Module

U0421-68 - Invalid data received from ride level control module - Algorithm based failure - event information (28)
( on 03-10-2024 15:56:41 at 162409 mi )

ACM-Audio System

U2100-00 - Initial configuration is not complete (2B)

BCM-Body Control

B1B01-87 - Key transponder - Bus signal/message failure - missing a message (28)

U0155-00 - LCD Gauge Communication Lost (2A)
( on 08-03-2025 18:23:43 )

U0164-00 - Lost communication with heating ventilation and air conditioning control module (2A)
( on 08-03-2025 18:23:43 )

U0242-00 - Lost communication with the headlamp control module B (2A)
( on 08-03-2025 18:17:01 )

U0184-00 - Lost communication with audio unit (2A)
( on 08-03-2025 18:18:11 at 165962 mi )

U0214-00 - Lost communication with the remote function actuation (2A)
( on 08-03-2025 18:23:51 )

U0199-00 - Lost communication with the door control module A (2A)
( on 08-03-2025 18:22:32 )

U0200-00 - Lost communication with the door control module B (2A)
( on 08-03-2025 18:22:32 )

U0208-00 - Lost communication with the seat control module A (2A)
( on 08-03-2025 18:22:32 )

U025D-00 - Lost communication with front controls interface module B (2A)
( on 08-03-2025 18:18:11 at 165962 mi )

U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (2A)

U0018-00 - Medium speed CAN communication bus (–) shorted to bus (+) (2A)
( on 16-02-2025 13:54:47 )

DDM-Driver Door

B1164-15 - Right mirror heater output - General electrical failure - circuit short to battery or open (68)
( on 15-02-2025 07:14:26 at 165455 mi )

U0140-00 - Lost communication with body control module (2A)
( on 16-02-2025 13:25:05 at 165536 mi )

DSM-Driver Seat

U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (28)

U0140-00 - Lost communication with body control module (2A)
( on 24-11-2024 16:15:40 at 164106 mi )

U0199-00 - Lost communication with the door control module A (2A)
( on 15-09-2024 15:09:57 at 161954 mi )

FCDIM-Front Control

U0010-00 - Medium speed CAN communication bus (28)
( on 25-02-2025 12:56:35 at 165799 mi )

U0140-00 - Lost communication with body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

U0155-00 - LCD Gauge Communication Lost (2A)
( on 08-03-2025 18:17:05 )

U0300-00 - Internal control module software incompatibility (28)
( on 23-06-2025 22:50:51 at 0 mi )

B1D21-13 - Remote control switch - General electrical failure - circuit open (2B)
( on 02-06-2024 11:45:31 at 160633 mi )

FCIM-HVAC Buttons

U0164-00 - Lost communication with heating ventilation and air conditioning control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

U0424-68 - Invalid data received from heating, ventilation and air conditioning control module - Algorithm based failure - event information (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

FCIMB-Audio Buttons

U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (28)
( on 25-02-2025 12:56:35 at 165799 mi )

U0256-00 - Lost communication with the front controls interface module (2A)
( on 05-03-2025 12:07:44 )

HCMB-Headlamp

B1286-98 - Interior mirror - Component failure - component or system is over temperature (28)
( on 08-01-2025 17:06:49 at 164545 mi )

U0140-00 - Lost communication with body control module (2A)
( on 08-10-2024 18:32:38 at 162903 mi )

HVAC-Ventilation

U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

U0140-87 - Lost communication with body control module - Bus signal/message failure - missing a message (2A)
( on 16-02-2025 13:53:52 at 165536 mi )

U0422-86 - Invalid data received from the body control module - Bus signal/message failure - signal is invalid (2B)
( on 01-06-2024 17:55:23 at 160633 mi )

U3000-55 - Control module - System programming failure - is not configured (2B)
( on 01-06-2024 17:55:23 at 160633 mi )

IPC-Instrument Pack

U0010-88 - Medium speed CAN communication bus - Bus signal/message failure - bus is off (68)

U0140-00 - Lost communication with body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

U0184-00 - Lost communication with audio unit (2A)
( on 24-11-2024 16:15:38 at 164106 mi )

U025D-00 - Lost communication with front controls interface module B (2A)

U3000-87 - Control module - Bus signal/message failure - missing a message (2A)

KVM-Keyless

U0140-00 - Lost communication with body control module (2A)
( on 25-02-2025 12:56:35 at 165799 mi )

PAM-Parking Aid

U0140-00 - Lost communication with body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

U0422-00 - Invalid data received from the body control module (2A)
( on 08-03-2025 15:51:35 at 165950 mi )

PBM-Parking Brake

U2002-01 - Switch general electrical failure - General failure information - general electrical failure (28)
( on 14-02-2025 20:13:36 at 165387 mi )

PDM-Passenger Door

B1163-15 - Left mirror heater output - General electrical failure - circuit short to battery or open (68)
( on 15-02-2025 07:14:26 at 165455 mi )

U0140-00 - Lost communication with body control module (2A)
( on 16-02-2025 13:24:45 at 165536 mi )

[DieselLSE]

Firstly, I'd check the alternator. If charging OK, I'd replace the battery with a Varta G14 (there may be an upgraded model) and reset the BMS. Clear all faults and see what happens.

[BushDisco]

Firstly, I'd check the alternator. If charging OK, I'd replace the battery with a Varta G14 (there may be an upgraded model) and reset the BMS. Clear all faults and see what happens.

Do you recommend a method for testing the alternator?

[DieselLSE]

Do you recommend a method for testing the alternator?
I use a battery tester that comes with an alternator test function, but any auto electrician should be able to test it. Bear in mind the typical life of a D4 alternator is about 170,000km to about 190,000km. If you're on your original alternator after 13 years I'd certainly suspect it.

[BushDisco]

I use a battery tester that comes with an alternator test function, but any auto electrician should be able to test it. Bear in mind the typical life of a D4 alternator is about 170,000km to about 190,000km. If you're on your original alternator after 13 years I'd certainly suspect it.

As far as I know it's the original alternator. I purchased the disco in 2016 at 4 years old and 90k so I doubt it would have been replaced.

Car is still on charge from last night so the batteries must have been low. I'm see what happens over the next week and get the alternator tested if there are any reoccurances.

[John_D4]

Can a bad earth do this?

[BushDisco]

Update, so I charged the dual batteries from Saturday late arvo to 10am this morning and it did not finish charging, I've got a 10amp smart charger and it sat on absorbtion phase the entire time. However the car continues to start and drive well with no other issues, but I had another episode of systems reboot whilst driving this afternoon, not even the indicators would work until CPU's fully rebooted.

I'll get batter and alternator tested during the week. I doub't its a bad earth or car would have other issues likke poor starting or lights. Has no issues cranking.

I know the system is voltage sensitive so it may be the alternator putting out voltages too high and CPU's being spiked or shutting down in protection. Public holiday here today so i cant get the electrics tested.

I'll plug in the IID on the drive to work tomorrow and see what the voltage does as I drive then try find an auto elec to test.

Its the only significant issue i have had with the disco in over 10 years of ownership so I can't complain.

[veebs]

There's no electrical smell is there?

I can't recall the exact details, but something along the lines of a failing alternator can, in cases, cause a dead short, resulting in rare cases of fire.

[discomatt69]

Update, so I charged the dual batteries from Saturday late arvo to 10am this morning and it did not finish charging, I've got a 10amp smart charger and it sat on absorbtion phase the entire time. However the car continues to start and drive well with no other issues, but I had another episode of systems reboot whilst driving this afternoon, not even the indicators would work until CPU's fully rebooted.

I'll get batter and alternator tested during the week. I doub't its a bad earth or car would have other issues likke poor starting or lights. Has no issues cranking.

I know the system is voltage sensitive so it may be the alternator putting out voltages too high and CPU's being spiked or shutting down in protection. Public holiday here today so i cant get the electrics tested.

I'll plug in the IID on the drive to work tomorrow and see what the voltage does as I drive then try find an auto elec to test.

It’s the only significant issue i have had with the disco in over 10 years of ownership so I can't complain.
I see you are in Blackburn, maybe give AMV a call or just drop in, Greg is very helpful and knowledgeable

[loanrangie]

Disconnect the 2nd battery and see if it charges, the traxide system can mask a bad battery . If either battery is failing the bad battery will pull charge from the other until both are below optimum voltage.

[Tombie]

Whats being described with the vehicles "energy strategy" when running low on power.

Alternator would be first test...

[BushDisco]

So I have been running the IID tool all this week whilst driving so I can monitor voltage, current and state of charge.

I have not had a repeat issue after the 4 initial reboots on Saturday and Monday, no issues starting or driving and state of charge has stayed between 93 and 95%.

Battery voltage at the battery and at the BMS CPU has been between 13.2 and 14.2v. Battery current has been 1 to 5 amps, apart from starting the car when it spikes to negative 40+ to positive 40+ for a short period as the starter motor is going.

What I'm not sure is normal is the alternator current is between 30 and 50 amps out of the alternator whilst driving normally.

I do have a snip of the live value but not sure how to include in this post.

Thanks.

[Eric SDV6SE]

There are multiple earth points to check, that and thr connections at the battery would be first.

Then a cranking test, hook up your multimeter and note the voltage of thr battery at rest, you say 13.4V. Turn ignition on, voltage should drop a few volts as systems power up. If you wish you can turn on headlights, radion heater, ac etc to further load the systems. Start engine and note the voltage drop as the engine starts.if the voltage drops below 10v, your battery is not strong enough. Alternator will push a float charge into battery, but as its a smart alternator, it will stop charging when it senses the battery has sufficient charge based on system load. If the battery is failing, it will not hold charge and the car will shut down systems progressively. If the alternator is failing, most likely thr diode pack on the rear of it, it will put out random voltages and dpukes. The alternator is rated for 160 amps, but modulates this based on demand.

Best advice would be if the alternator and battery are original , replace both, as a dodgy alternator can fail a new battery.

[discomatt69]

Have you had the battery load tested yet??
first thing to do before just replacing bits
if a load test comes good get the alternator tested
very easy and cheap as chips when compared to replacing bits

[BushDisco]

Thanks all for tests and advise. I'm out of Melbourne until Monday then I'll find a sparky near Blackburn and get both battery and alternator tested.

If anyone has recommendations of a good local sparky in the blackburn, box hill, nunnawading area that would be useful.

[V8Ian]

Discomatt has already offered a recommendation.
"I see you are in Blackburn, maybe give AMV a call or just drop in, Greg is very helpful and knowledgeable."

[BushDisco]

Neither AMV nor Rover Range in Bentleigh have availability to diagnopse until respectively mid-April and mid-May. I had a good chat with both and neiother had experienced this issue prior.

After no issues for a week I had a repeat issue yesterday mid-day. I full charged both batteries last weekend, bench charging the 'camping' battery. I ran with only the engine battery connected for several days with zero issues, even though its over 7 years old and the second battery is less than 2 years old. I've been monitoring on the IID whilst driving and voltage has been stable, with good resiliance and not dropping under 12.4 volts unless cranking, then only for 1-2 seconds.

I am going to purchase a new battery this weekend, simply because its more than 7 years in active daily use, but I suspect it isn't the cause. The alternate also seems fine and I would prefer not to replace simply because of age and KM's as it show no symptoms of failing.

I'm at a bit of a dead end tbh. I am going to hard reset at the same time I replace primary battery, and I am also going to take the Traxide out of the loop for a couple of weeks to go back to standard config.

IID diagnostics still show muiltiple and simultaneous CPU faults when the systems restart, so no change there. Has now happened 5 or 6 times. Interestingly I have had am intermittent issue with the fob not being able to unlock the car over the last few weeks and I suspect it may be related to this issue as if I try for a couple of minutes it will suddenly unlock and then be fine for a few days. occurs with both fobs and I have changed their batteries with fresh ones several times.

As stated I am at a dead end, at least it still drives during the system reboots, however not being able to signal lane changes during the events, or use reversing camera and sensors after until a car restart is also a little dangerous.

[BushDisco]

So I took for a load test, fully expecting to need to replace the primary battery, even took it to a battery joint that had a vested interest in failing the battery so they could sell a new one to me. And it passed, not even on the line, but with plenty of spare capacity.

I had not charghed the batteries since last weekend, Ive driven only short 15-30 minute trips, I had not used the car for 2 days and it was only a 15 minute drive to the battery joint, so every chance for a weak battery to fail the test. But it did not.

On top of that the IID shows the battery recharging quickly after a start then settling down to 15-20% alternator load depending on what I am running in the disco - audio system, air system etc.

I'll find somewhere to test the alternator this week, and give the owner of Rova Range a call when he is back but at this point I am baffled.

[shack]

So I took for a load test, fully expecting to need to replace the primary battery, even took it to a battery joint that had a vested interest in failing the battery so they could sell a new one to me. And it passed, not even on the line, but with plenty of spare capacity.

I had not charghed the batteries since last weekend, Ive driven only short 15-30 minute trips, I had not used the car for 2 days and it was only a 15 minute drive to the battery joint, so every chance for a weak battery to fail the test. But it did not.

On top of that the IID shows the battery recharging quickly after a start then settling down to 15-20% alternator load depending on what I am running in the disco - audio system, air system etc.

I'll find somewhere to test the alternator this week, and give the owner of Rova Range a call when he is back but at this point I am baffled.How many CCA did it test at?

I'd see how the new battery goes before doing anything else.