I have been suffering from a battery drain recently. I had thought this may be linked to my BAS supplied FBH remote system. Or the loose positive terminal?

So whilst working on the car today I plugged in my IIDBT tool and the following faults were identified;-

U0073-88 (2C) Control module communication bus off - Bus signal/message failure - bus is off
( on 21-12-2021 12:49:56 at 227730 km )
Auxilary Heater

B1D33-92 (2E) Flame interruption during normal operation - Component failure - performance or incorrect operation
U1A44-6C (2E) Fuel level
Body Control

B1B70-81 (2 Local interconnection network bus circuit 2 - Bus signal/message failure - invalid serial data received
( on 03-12-2021 12:17:37 at 227150 km )
B1B93-3A (2F) Seat recline motor speed/position sensor - Frequency modulation/pulse width modulation failure - incorrect, has too many pulses
( on 03-12-2021 08:25:05 at 227150 km )
B1C99-15 (6C) Right corner lamp circuit - General electrical failure - circuit short to battery or open
( on 05-12-2021 02:27:23 at 227150 km )
B1D00-15 (6C) Left low beam circuit - General electrical failure - circuit short to battery or open
( on 21-12-2021 12:49:50 at 227730 km )
Engine TDV8

U0138-00 (2 Lost communication with all terrain control module
U0405-81 (2 Invalid data received from speed control module - Bus signal/message failure - invalid serial data received
U0405-85 (2 Invalid data received from speed control module - Bus signal/message failure - signal is above allowable range
HeadLight

B1D67-91 (AF) Right headlamp power module - Component failure - parametric
( on 12-04-2021 04:27:08 at 227748 km )
B1D69-01 (2 Right headlamp swivelling feedback sensor circuit - General failure information - general electrical failure
( on 21-12-2021 12:38:47 at 227724 km )
Instrument Pack

U0132-87 (2 Lost communication with ride level control module - Bus signal/message failure - missing a message
U0182-87 (2E) Lost communication with front lighting control module - Bus signal/message failure - missing a message
U0159-87 (2E) Lost communication with parking assist control module - Bus signal/message failure - missing a message
B1A87-68 (2 Battery disconnection/electronic control unit reset - Algorithm based failure - event information
Parking Brake

U0122-87 (A Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 17-12-2021 17:43:53 at 227592 km )
C1A00-16 (A Control module - General electrical failure - circuit voltage below threshold
( on 06-12-2021 07:09:33 at 227168 km )
U0155-87 (A LCD Gauge Communication Lost - Bus signal/message failure - missing a message
( on 08-12-2021 03:19:53 at 227216 km )
Steering Angle

U0300-55 (2 Internal control module software incompatibility - System programming failure - is not configured
( on 12-04-2021 04:26:43 at 0 km )
Suspension

U1A13-87 (2 Lost communication with all terrain control module - Bus signal/message failure - missing a message
( on 07-12-2021 14:02:01 at 227204 km )
Transfer Case

U0138-86 (2 Lost communication with all terrain control module - Bus signal/message failure - signal is invalid
( on 07-12-2021 14:02:01 at 227204 km )
Transmission

U0155-87 (6D) LCD Gauge Communication Lost - Bus signal/message failure - missing a message
( on 12-04-2021 04:26:43 at 0 km )
Ventilation

B1B74-00 (2F) Front foot-defrost mode stepper actuator
( on 03-12-2021 12:15:32 at 227156 km )
B1B75-00 (2F) Front foot-face mode stepper actuator
( on 03-12-2021 12:15:33 at 227156 km )

It suggests to me, despite it seeming to be okay, to be the battery that’s at fault? I currently have a Bosch 95Ah 800a battery fitted.

I am looking at a Bosch S5 110Ah as a replacement- what are your thoughts?

Ps all the faults cleared and have stayed off so far , fingers crossed

The battery is 3 years old, and the car is a 2097 TDV8 without stop-start. Previously owned 1999 Disco 2 TD5
Disco 3 HSE TDV6 2007
Gone 2007 TDV8 RRS1 in Buckingham Blue.

How do know if the knocking at the front has been sorted?

You can hear the knocking at the rear better

The battery drain might be the rear glass hatch switch. They are a known corrosion issue. Easy enough to replace too, which is good news.

Unless you can track the battery drain issue down, replacing the battery won't really help - the new one will also be subjected to draining.

Have you checked the alternator output with the engine running? If that's not fully healthy, the battery will struggle over time too. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

RR - The Alternator has been tested and seems healthy. But it could be the rear tailgate as the new number plate lights that I fitted recently have already started to suffer. Looks like water may be in there somewhere

And thats how I will be spending my day

Thanks pal

M.

MartinsTDV8 wrote:

I have been suffering from a battery drain recently. I had thought this may be linked to my BAS supplied FBH remote system. Or the loose positive terminal?

So whilst working on the car today I plugged in my IIDBT tool and the following faults were identified;-

U0073-88 (2C) Control module communication bus off - Bus signal/message failure - bus is off
( on 21-12-2021 12:49:56 at 227730 km )
Auxilary Heater

B1D33-92 (2E) Flame interruption during normal operation - Component failure - performance or incorrect operation
U1A44-6C (2E) Fuel level
Body Control

B1B70-81 (2 Local interconnection network bus circuit 2 - Bus signal/message failure - invalid serial data received
( on 03-12-2021 12:17:37 at 227150 km )
B1B93-3A (2F) Seat recline motor speed/position sensor - Frequency modulation/pulse width modulation failure - incorrect, has too many pulses
( on 03-12-2021 08:25:05 at 227150 km )
B1C99-15 (6C) Right corner lamp circuit - General electrical failure - circuit short to battery or open
( on 05-12-2021 02:27:23 at 227150 km )
B1D00-15 (6C) Left low beam circuit - General electrical failure - circuit short to battery or open
( on 21-12-2021 12:49:50 at 227730 km )
Engine TDV8

U0138-00 (2 Lost communication with all terrain control module
U0405-81 (2 Invalid data received from speed control module - Bus signal/message failure - invalid serial data received
U0405-85 (2 Invalid data received from speed control module - Bus signal/message failure - signal is above allowable range
HeadLight

B1D67-91 (AF) Right headlamp power module - Component failure - parametric
( on 12-04-2021 04:27:08 at 227748 km )
B1D69-01 (2 Right headlamp swivelling feedback sensor circuit - General failure information - general electrical failure
( on 21-12-2021 12:38:47 at 227724 km )
Instrument Pack

U0132-87 (2 Lost communication with ride level control module - Bus signal/message failure - missing a message
U0182-87 (2E) Lost communication with front lighting control module - Bus signal/message failure - missing a message
U0159-87 (2E) Lost communication with parking assist control module - Bus signal/message failure - missing a message
B1A87-68 (2 Battery disconnection/electronic control unit reset - Algorithm based failure - event information
Parking Brake

U0122-87 (A Lost communication with vehicle dynamics control module - Bus signal/message failure - missing a message
( on 17-12-2021 17:43:53 at 227592 km )
C1A00-16 (A Control module - General electrical failure - circuit voltage below threshold
( on 06-12-2021 07:09:33 at 227168 km )
U0155-87 (A LCD Gauge Communication Lost - Bus signal/message failure - missing a message
( on 08-12-2021 03:19:53 at 227216 km )
Steering Angle

U0300-55 (2 Internal control module software incompatibility - System programming failure - is not configured
( on 12-04-2021 04:26:43 at 0 km )
Suspension

U1A13-87 (2 Lost communication with all terrain control module - Bus signal/message failure - missing a message
( on 07-12-2021 14:02:01 at 227204 km )
Transfer Case

U0138-86 (2 Lost communication with all terrain control module - Bus signal/message failure - signal is invalid
( on 07-12-2021 14:02:01 at 227204 km )
Transmission

U0155-87 (6D) LCD Gauge Communication Lost - Bus signal/message failure - missing a message
( on 12-04-2021 04:26:43 at 0 km )
Ventilation

B1B74-00 (2F) Front foot-defrost mode stepper actuator
( on 03-12-2021 12:15:32 at 227156 km )
B1B75-00 (2F) Front foot-face mode stepper actuator
( on 03-12-2021 12:15:33 at 227156 km )

It suggests to me, despite it seeming to be okay, to be the battery that’s at fault? I currently have a Bosch 95Ah 800a battery fitted.

I am looking at a Bosch S5 110Ah as a replacement- what are your thoughts?

Ps all the faults cleared and have stayed off so far , fingers crossed

The battery is 3 years old, and the car is a 2097 TDV8 without stop-start.

Loose positive battery clamp will show similar faults.


Dave 2010 3.6 TDV8 HSE (Gone)
2011 Discovery 4 Commercial SDV6 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago)