Power steering communication error in Diagbox

[coolerl]

Hello,
While doing a check on some other issues, I noticed that DiagBox is stating that it cannot communicate with the Power Steering ECU and with the Headlights ECU.

The power steering is working normally and no other errors are displayed nor are there any errors reported on the vehicle ECU.

For the Headlights, I have the standard mirror headlights (not the xenon ones) and I've noticed that they do have motors for height adjustment but there is no button for manually controling them...
I am guessing that this part should be handled by some ECU? (probs the one handling the hidraulic suspension?)

Type of vehicle C5
Vehicle Layout C5 (X7)
VIN: VF7**************[VIN obfuscated, can be read by forum staff]*

CORPRO :
Response data
State of the ECU: communication error
Reference 1 :
Reference 2 :
Faults present :

DIRECTN :
Response data

State of the ECU: communication error
Reference 1 :
Reference 2 :
Faults present :

I don't really know how or from where to pick this up or if actually they are errors that should be treated in some way.

Thanks a lot, in advance, for your help

[GiveMeABreak]

Headlight levelling is done automatically where Xenons are fitted, there is no manual levelling system.

I'm not sure what you're expecting from that list - there's no data there, just a load of headings????

[wheeler]

On my C5 with normal halogen headlamps the height adjuster was here a no 20 just below the indicator stalk. Not an obvious or normal place for the height adjustment switch. As said above on models with Xenon headlamps the height adjustment is automatic & this switch is blanked off.
On vehicles that do have headlamp ECU's the headlamps may need to be switched on for Diagbox to communicate with them.

[coolerl]

Headlight levelling is done automatically where Xenons are fitted, there is no manual levelling system.

I'm not sure what you're expecting from that list - there's no data there, just a load of headings????

Hi Marc,
I posted those headings because that is all that diagbox is reporting for those 2 entries since it says that it cannot communicate with those ECUs.
Since the power steering is operational and seems to run correctly I was hoping for a hint on where to look to actually figure out why the ECU is not communicating with the DiagBox.

For other issues, for example, the DiagBox reports all the required information:

ABRASR : Anti-lock Braking System (ABS) or Electronic Stability Program (ESP)
Response data
R61FE0000000003830F0409000B1B010F0409FE00000001666721
R6180966654288000039666542880FFFFFFFF0701FFFFFF00

State of the ECU: ESP81
Reference 1 : 9666542880
Reference 2 :
Faults present : 1

P0562 : ECU supply undervoltage fault.
Characterisation : not characterised
Status : Temporary
Location : local
Variables associated with the fault
vehicle speed : 0 kph
Front LH wheel speed : 0 kph
Front RH wheel speed : 0 kph
Rear LH wheel speed : 0 kph
Rear RH wheel speed : 0 kph
EBA regulation : deactivated
EBD regulation : deactivated
Anti-slip regulation with action on brakes (BASR) : deactivated
Anti-Slip with action on engine torque disconnected (ASR/ESR) : deactivated
Anti-engine brake regulation (MSR) : deactivated
Anti-Slip regulation with action on engine torque (ASR) : deactivated
Electronic Stability Program (ESP) regulation : deactivated
ABS regulation : deactivated
Recirculation pump activated : No
Electric parking brake status : Off
Status of the "assisted holding" function : No holding
Braking status : No braking in progress
Yaw angle speed : 000 °/s
transverse acceleration : -00.1 m/s²
Steering wheel angle : 81.8 degrees
Distance travelled since last time ignition switched on : 195.9 km
supply voltage : 07.2 V
Braking pressure : 00.0 bars
status of the ECU : Main
longitudinal acceleration : -0.08 m/s²
Clutch pedal sensor voltage : Value invalid V


SUSPVAR : Electronically managed suspension
Response data
R61FEFFFFFFFF0661FFFFFF00E00002FFFFFFFFFFFFFFFF667077

State of the ECU: SUSPENSION_ECOTECH
Reference 1 : 667077
Reference 2 :
Faults present : 1

U2005 : triggering (vehicle speed receipt anomaly)
Characterisation : Not characterised
Status : Permanent fault
Location : distant
Variables associated with the fault

[coolerl]

On my C5 with normal halogen headlamps the height adjuster was here a no 20 just below the indicator stalk. Not an obvious or normal place for the height adjustment switch. As said above on models with Xenon headlamps the height adjustment is automatic & this switch is blanked off.
On vehicles that do have headlamp ECU's the headlamps may need to be switched on for Diagbox to communicate with them.

Nope. I don't have that knob. I checked
Its an X7 built in 2010

[wheeler]

Mines was also a 2010 model & has the adjuster switch right there.

[GiveMeABreak]

Pleas provide the Full VIN without spaces as it is, so I can see exactly what you do have Please post your VIN in full without spaces - it will be automatically masked from public view after submitting your post & will only be visible to staff.

[coolerl]

Pleas provide the Full VIN without spaces as it is, so I can see exactly what you do have Please post your VIN in full without spaces - it will be automatically masked from public view after submitting your post & will only be visible to staff.

Hi Marc,
VIN is VF7**************[VIN obfuscated, can be read by forum staff]

Thanks

[GiveMeABreak]

Ok, problem solved. You have Hydractive suspension and the headlamp adjustment is automatic, so there is no remote manual switch in the vehicle. Your specs implicitly state "Automatic Headlamp Adjustment". On X7 vehicles with metal suspension and halogens, there is a Remote manual switch on the dash at (20), which is why you don't have it.

You have halogens, so there is no directional headlight ECU which is why Diagbox can't communicate with it.

You don't have issues, so everything is normal.

[coolerl]

Ok, problem solved. You have Hydractive suspension and the headlamp adjustment is automatic, so there is no remote manual switch in the vehicle. Your specs implicitly state "Automatic Headlamp Adjustment". On X7 vehicles with metal suspension and halogens, there is a Remote manual switch on the dash at (20), which is why you don't have it.

You have halogens, so there is no directional headlight ECU which is why Diagbox can't communicate with it.

You don't have issues, so everything is normal.

Thanks Marc!
OK for the Headlight adjustment.

How about the Power Steering communication error problem.
That is the one that honestly bothers me the most.
I know that in the past I did not see this error and I could also check the parameters for the power steering.

[GiveMeABreak]

I don't see an error or a code in your last posts for the power steering. If there was an issue you would have a code and or a warning lamp on the dash.

U2005 is a ghost fault, so can be ignored as that is always shown when interrogating the suspension ECU with a diagnostic tool and normal.

[coolerl]

I don't see an error or a code in your last posts for the power steering. If there was an issue you would have a code and or a warning lamp on the dash.

U2005 is a ghost fault, so can be ignored as that is always shown when interrogating the suspension ECU with a diagnostic tool and normal.

There is no error because the diagbox cannot communicate with the ECU. However the power steering is operational and it seems to run correctly.
My feeling is that this issue started on the same moment when I also received the undervoltage error on the ABS ECU (which seems to have happened during driving).
Should I try performing the Battery reset procedure?

DIRECTN :
Response data
State of the ECU: communication error
Reference 1 :
Reference 2 :
Faults present :

[GiveMeABreak]

P0562 means you have an under-voltage situation with the ESP ECU.
The fault will disappear when one of the following is true:

Possibility 1
The ECU is in regulation and the ECU voltage is higher than 9,2 V
Possibility 2
If the ECU is not in regulation and the ECU voltage is higher than 9,3 V
Possibility 3
Voltage of the ECU higher than 8,2 V
Possibility 4
Voltage of the ECU higher than 7,7 V

Suspects areas:

• Electrical harness
• Incorrect battery voltage
• Fuses
• CONNECTORS / Screwed terminal

I'd get your battery fully charged too.