Steering Angle Data Missing - Possible Module Fault?

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M

Martian

Active Member
Posts
173
Location
Lincolnshire
L1322 TDV8 3.6 Range Rover 2007.

Hi Everybody,

I am using a iCarsoft LR V2.0 to monitor steering angle 'real time' data but the figure remains at 0 whilst I turn the steering wheel.

It is, obviously, not the steering angle sensor, (SAS), as the 4x4 graphics screen shows the front wheels move in sympathy with the steering wheel.

I therefore suspect that the steering data is not reaching another module, (where the iCarsoft scanner is trying to read the data from), and this missing data may well be causing the 'cascading' error messages?

The vehicle displays: -

Engine System Fault.
HDC Fault.
Transmission Fault.

And it then goes into limp mode.

This may happen immediately or it may take a few seconds before it presents itself.

I suspect this is a 'self induced' problem caused by my cutting through several cables that were incorrectly routed through one of the rear seat retaining brackets under the rear carpet and I have already severely rebuked myself.

I have repaired all cables but suspect that a momentary 'short', (or grounding), between two cables has damaged a module as the vehicle was running fine beforehand.

All other vehicle systems appear to be fine and the engine starts and runs fine, the hi/low works, the gearbox is fine, the air suspension works and everything else seems to be happy - unlike myself?

I suspect that this is either a module or bus issue?

Has anybody experienced a similar issue that may assist me identify which module to further interrogate?
 
RangeRoller dt said:
IF your battery goes low or gets disconnected you reset the steering angle with the ‘lock to lock’ method. If it comes back after that charge your battery
Click to expand...

RangeRoller dt,

Many thanks for the tip but that makes no difference unfortunately.

I can see 'live' steering angle data in the ABS Module, (using the iCarmate), but not in the Dynamic Module - the value remains at zero!

I also tried resetting the steering angle sensor with the iCarmate and, although the valued appear to be OK at the ABS Module, (zero at centre going positive in one direction and negative in the other), there is still no value appearing in the Dynamic Module.
 
Hi

may i ask plse , have u double checked the yellow bit is secured to the column plse as if that comes loose the steering wheel angle sensor can’t read it

Alas is a common issue , hope that may help a little

98FE1F17-1116-447D-B1B2-7CAFFAAB98BF.png
 
Also wrote out a canbus test sequence using ur multimeter to ensure all ur modules are communicating correctly

plus double check the obd2 connector pins haven’t been spread and are making a good connection with ur code reader

regarding ur battery , what Vdc are u getting with ur multimeter at the battery with the engine off plse

plse let us know what results u get , really hope it’s useful to u

50954F65-BCB4-493A-B324-D670D93FFAFE.png
 
Almost forgot , try out a hard reset , by removing both battery leads from the battery posts, then touch both of the cables together for around 10 x minutes , ensuring that the cables don’t touch the battery posts itself

u might need a jump lead in order for both cables to reach one another
 
GStuart,

Many thanks for taking the time to provide me with the benefit of your knowledge and some suggestions.

I have read many articles regarding strange and spurious issues due to a failing battery and I replaced the battery just before Christmas - I was having strange current drain issues - but no errors.

I have not had any errors, whatsoever, until last weekends fiasco!!

I will pop out and measure the voltage, (both engine off and with the engine running), when I pop out to try the hard reset!

Can you please confirm where I am to do the continuity and voltage checks - is it the OBDII Connector?

Once I have confiŕmation I will do the CANBUS test and report back!

I am using the iCarsoft Scanner - I know that it is not the recommended tool but it does provide me with far more info than the generic Scanners!
 
Martian said:
GStuart,

Many thanks for taking the time to provide me with the benefit of your knowledge and some suggestions.

I have read many articles regarding strange and spurious issues due to a failing battery and I replaced the battery just before Christmas - I was having strange current drain issues - but no errors.

I have not had any errors, whatsoever, until last weekends fiasco!!

I will pop out and measure the voltage, (both engine off and with the engine running), when I pop out to try the hard reset!

Can you please confirm where I am to do the continuity and voltage checks - is it the OBDII Connector?

Once I have confiŕmation I will do the CANBUS test and report back!

I am using the iCarsoft Scanner - I know that it is not the recommended tool but it does provide me with far more info than the generic Scanners!
Click to expand...
Voltage check should be at the battery terminals.
 
Martian said:
GStuart,

Many thanks for taking the time to provide me with the benefit of your knowledge and some suggestions.

I have read many articles regarding strange and spurious issues due to a failing battery and I replaced the battery just before Christmas - I was having strange current drain issues - but no errors.

I have not had any errors, whatsoever, until last weekends fiasco!!

I will pop out and measure the voltage, (both engine off and with the engine running), when I pop out to try the hard reset!

Can you please confirm where I am to do the continuity and voltage checks - is it the OBDII Connector?

Once I have confiŕmation I will do the CANBUS test and report back!

I am using the iCarsoft Scanner - I know that it is not the recommended tool but it does provide me with far more info than the generic Scanners!
Click to expand...

Dont forget to follow the correct battery disconnection procedure or you can screw the sat nav. and other stuff
 
What a bizarre issue - but that will not be any surprise to all RR owners of course!

Battery voltage first: -

Voltage at battery terminals without engine running 12.88v.

Voltage at battery terminals with engine running 13.20v.

T0he Steering Angle Sensor and the Steering Angle Module appear to be working as I can 'see' real time steering angle data from both the Steering Angle Sensor Module and the ABS Module 626 to - 620 with 0 at centre position.

But the Transfer Case Module has an error: -

U0126 Lost communication with Steering Angle Sensor Module.

Here are the reads from most of the modules, (I have left out the climate control and audio visual entertainment modules); -

Diesel V8
P0480 Fan 1 Control Circuit.
P0088 Fuel Rail/System Pressure Too High.

Auto Gearbox
Fault received from external node.

ABS
U0428 Invalid data received from the Steering Angle Sensor Module.
U0401 Imvalid data received from the Engine Control Module/Powertrain Control Module.

SRS
B1198 Drivers side inflatable tubular structure?!

Instrument Pack
No Errors.

HVAC
No Errors and I can view Module info.

Parking Aid Control Module
No Errors and I can view Module info.

All Terrain Control Module
No Errors.

Ride Level Control Module
Invalid data received from Vehicle Dynamic Control Module.

Steering Angle Sensor Module
No Errors.

Transfer Case Module
U0126 Lost communication with Steering Angle Sensor Module.

Vehicle Dynamic Control Module.
Invalid data received from Engine Control Module/Powertrain Control Module.

Obviously the codes are iCarsoft codes and not sure of they can be translated?

And the iCarsoft names for the modules may not be accurate either?

I appear to be able to read real time data from all Modules suggesting that they are all communicating with the ODB Diagnostic port at least.

Whilst double checking codes I noted another interesting issue -

I was successfully monitoring the Steering Angle real time data on the Ride Height Control Module with ignition switch in position 2 but engine not running.

I started engine and the data read 0 with no further change even when I turned the steering wheel.

I will undertake the CANBUS check, (as very kindly suggested by GStuart), first thing tomorrow morning.

I am also undettaking the 'hard reset' right now!

Any further assistance would be greatfully received.
 
Martian said:
What a bizarre issue - but that will not be any surprise to all RR owners of course!

Battery voltage first: -

Voltage at battery terminals without engine running 12.88v.

Voltage at battery terminals with engine running 13.20v.

T0he Steering Angle Sensor and the Steering Angle Module appear to be working as I can 'see' real time steering angle data from both the Steering Angle Sensor Module and the ABS Module 626 to - 620 with 0 at centre position.

But the Transfer Case Module has an error: -

U0126 Lost communication with Steering Angle Sensor Module.

Here are the reads from most of the modules, (I have left out the climate control and audio visual entertainment modules); -

Diesel V8
P0480 Fan 1 Control Circuit.
P0088 Fuel Rail/System Pressure Too High.

Auto Gearbox
Fault received from external node.

ABS
U0428 Invalid data received from the Steering Angle Sensor Module.
U0401 Imvalid data received from the Engine Control Module/Powertrain Control Module.

SRS
B1198 Drivers side inflatable tubular structure?!

Instrument Pack
No Errors.

HVAC
No Errors and I can view Module info.

Parking Aid Control Module
No Errors and I can view Module info.

All Terrain Control Module
No Errors.

Ride Level Control Module
Invalid data received from Vehicle Dynamic Control Module.

Steering Angle Sensor Module
No Errors.

Transfer Case Module
U0126 Lost communication with Steering Angle Sensor Module.

Vehicle Dynamic Control Module.
Invalid data received from Engine Control Module/Powertrain Control Module.

Obviously the codes are iCarsoft codes and not sure of they can be translated?

And the iCarsoft names for the modules may not be accurate either?

I appear to be able to read real time data from all Modules suggesting that they are all communicating with the ODB Diagnostic port at least.

Whilst double checking codes I noted another interesting issue -

I was successfully monitoring the Steering Angle real time data on the Ride Height Control Module with ignition switch in position 2 but engine not running.

I started engine and the data read 0 with no further change even when I turned the steering wheel.

I will undertake the CANBUS check, (as very kindly suggested by GStuart), first thing tomorrow morning.

I am also undettaking the 'hard reset' right now!

Any further assistance would be greatfully received.
Click to expand...
Voltage at battery terminals engine off should be 12.6 to 12.8 volts
Voltage at battery terminals engine running should be 14.4 tp 14.8 volts, certainly not 13.2 volts.
 
Datatek said:
Voltage at battery terminals engine off should be 12.6 to 12.8 volts
Voltage at battery terminals engine running should be 14.4 tp 14.8 volts, certainly not 13.2 volts.
Click to expand...

Datatek, yes I agree as there should be a significant increase in voltage, (as compared to the 'standard' 12v), when the alternator is charging but that was the voltage reading I took yesterday evening.
 
Martian said:
Datatek, yes I agree as there should be a significant increase in voltage, (as compared to the 'standard' 12v), when the alternator is charging but that was the voltage reading I took yesterday evening.
Click to expand...
I'd hazard a guess that the alternator is on the way out or wiring problem.Put a jump lead from the negative post on the battery to the engine and check the reading.if it increases then check the body to engine earth lead ,under the exhaust manifold I think
 
Plus 1

there’s also a big earth lead , drivers side behind the wheel arch liner that’s part of the alternator circuit but as mentioned use a jump lead first to see if it changes
 
Some excellent news - the beast is alive!!!!!

Yesterday evening, (whilst the storm raged all around us), I decided to review all of the error messages that I read from my scanner, (assisted earlier in this post), and decided to start with the 'Engine' errors as these 'real' codes continue to appear despite my erasing them time and time again.

P0480 - Fan 1 Control Circuit.
I decided to skip this as I do not believe it is a 'serious' fault but I will check the electric fan before the summer arrives!!!

P0088 Fuel Rail/System Pressure Too High
This error seemed to be more serious but it did not light the MIL light on the dash?

After some extensive searching on the Internet this fault can be related to both the fuel tank and pump assembly as well as the high pressure pump circuit feeding the injector rail.

And the L322 TDV8 3.6 service manual also refers back to these two fuel circuits in reference to the P0088 error code.

After trawling through a high number of P0088 related links I stumbled across a three year old post written by 'steveball' that was EXACTLY the same problem I had!

Just like I had done, (last weekend), Steveball had removed his fuel pump and sender units to see if he could resolve a faulty/inaccurate fuel guage problem.

Once he had checked everything, (and put the pump and both sender units back into the tank - a VERY tricky job), he noted that as soon as he started his engine it would produce the exact same errors that I was getting: -

Engine System Fault.
HDC Fault.
Transmission Fault.

And the vehicle would then drop into limp mode.

Cutting a long story short he monitored the fuel pressure and confirmed it was high and suspected a blocked filter and/or included fuel line.

As I had also removed my pump and both sender units I considered the possibility of crud or sediment getting drawn up into my fuel circuit and decided to order a fuel filter and a bottle of fuel additive/cleaner for good measure!

I had a ride over to Lincoln this morning, (on one of my bikes), to pick up the filter and additive and had I the filter replaced by 11am, (just as the rain started)!

I climbed into the car and turned the key on and off, (several times to prime the fuel circuit), and on the first attempt to crank she started first time - as she always does but, after about 5 seconds, I heard the dreaded 'bong' 'bong' and the three errors on the dash yet again!

But had I reset the codes from yesterday evening?

I grabbed my scanner and ran through every module and cleared everything error and I also did another steering angle calibration too and then turned off the ignition and locked the car.

I then opened the car and started her once again and decided to take her up the road - if only to get the additive circulating - but it did not drop into limp mode and no errors appeared on the dash!

My initial fear that I had damaged a module, (when I accidentally sliced through a wiring harness - even though thr ignition was off), was not the case and I had allowed that suspicion to detract me from the real fault!

I then took the vehicle for a 40 mile test drive, (to fill her up at the nearest supermarket fuel station), and she has behaved herself impeccably for the first time since last Sunday.

I am hoping that she will continue to do do once again.

May I thank you all for your assistance and suggestions and I hope my experience may benefit others at some point in the future.

Regards,

Martin.
 
tomcat59alan said:
I'd hazard a guess that the alternator is on the way out or wiring problem.Put a jump lead from the negative post on the battery to the engine and check the reading.if it increases then check the body to engine earth lead ,under the exhaust manifold I think
Click to expand...
Tomcat59Alan,

Many thanks for the additional info - I will check the readings as per your instructions as I know that the RR family are very sensitive to low voltages, earthing and connector issues.
 
gstuart said:
Plus 1

there’s also a big earth lead , drivers side behind the wheel arch liner that’s part of the alternator circuit but as mentioned use a jump lead first to see if it changes
Click to expand...

gStuart,

Many thanks for the additional info regarding the earths I will do some further testing as I am sure it may serve to prevent further potential issues.

Regards, Martin.
 
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