Total cut out

[gustav]

I drive a x7 2.0 hdi manual 140hp 2010. So far I have been very happy with the car since I bought it in may.
The last 8 weeks or so I have had minor electrical issues like economy mode is activated despite the battery is new. Error message “brake system failure” shows briefly when driving over bumps (bad roads) in high speeds. This seems to be triggered by the wheels on the passenger side only.
Yesterday I was driving home from the north of Sweden and the temperature was -16 celsius. At 90 kmh passenger wheels were hitting a hole and triggered the same error message only this time it was followed (after 2 sec) by a total cut out. The car was totally dead as if someone removed the battery. Not even the warning lights worked. We stopped the car and after aprox 40 sec the power returned and I could start the car like nothing had happened. This happened one more time yesterday. This time the error message showed and the engine stopped running but the power returned immediately. Once the car stopped it started right away.
Anyone had similar problems? Common fault on c5 x7? Were to start searching?
Really thankful for all help and ideas!

[wheeler]

Id check the main positive & earth connections & battery terminals. Check the main body to engine earths & the main positive connection at the under bonnet fusebox.

[gustav]

Id check the main positive & earth connections & battery terminals. Check the main body to engine earths & the main positive connection at the under bonnet fusebox.

Ok, will do. My plan is also to check the three main fuses. I've read somewhere that the aluminium connections sometimes becomes corroded.
Do U know the locations of the main body to engine earths?

Thanks!

[bobins]

In the UK the Government have a central databse of vehicle recalls that we can look up. Do you have the same over there ? The reason I ask is because there were recalls to do with faulty fuseboxes and faulty cables for early C5 X7, but they were specific to certain chassis number ranges i.e. from build date xx/xx/xx to build date xx/xx/xx.

[Steveo]

Hi
This is very interesting because I have a 2009 2.0 hdi and have service history to the effect that the fuse box was changed on my car but I didn't know it was due to a recall
I will check my paperwork tomorrow

These are the messages I have had previously on my car
At least 3 occasions

£129 paid so not a recall

Regards
Steve

[Steveo]

Hi all
Post edited
Any thoughts on the above
Regards
Steve

[GiveMeABreak]

Ok, so that was a TSB for an issue where the car is hesitating, jerking, stalling, lack of power or where the Auto gearbox can become locked in 3rd (limp home mode) on the DT10BTED4 engine.

If fault codes P0215 and P0245 are showing up then it will either be Fuse F1 that has failed, but if not and these 2 fault codes are showing, then the engine fusebox needs replacing (as has obviously been done in your case Steve). From build date 12013 (29/09/2009) a new fusebox was fitted that had a modified main relay.

The fusebox went through at least 3 revisions from 6500FQ, 2500HG, 6500HK depending on build date (Citroen Numbers) then all were replaced with 9675877980, then this one was also replaced with 9807028580, which is the latest incarnation.

So this may help you identify the part you have on your label of your current fusebox.

[Steveo]

Cheers Marc
Appreciated
Regards
Steve

[gustav]

These are the TDC:s from my car:

P1351
Raw code: 1351
ECU: Engine control unit
Status: Test is inhibited by other DTC, Validated and stored in non volatile memory
OBDII: Ignition Coil Control Circuit High Voltage
Citroen: IDM input circuit Malfunction/Ignition coil control circuit High voltage SID 803/EDC16C3 - Pre/Post heating relay circuit. Relay not controlled and glow plugs supplied.
============2==============
P2565
Raw code: 2565
ECU: Engine control unit
Status: Pending fault present during this driving cycle
OBDII: Turbocharger (TC) boost control position sensor - circuit high
============3==============
P1671
Raw code: 1671
ECU: Engine control unit
Status: Pending fault present during this driving cycle, Validated and stored in non volatile memory
Citroen: MM6LP - Cruise control.
============4==============
P0495
Raw code: 0495
ECU: Engine control unit
Status: Test conditions are met, Validated and stored in non volatile memory
OBDII: Engine coolant blower motor speed - high
============5==============
P0215
Raw code: 0215
ECU: Engine control unit
Status: Pending fault present, Test conditions are met, Validated and stored in non volatile memory
OBDII: Fuel shut-off solenoid - circuit malfunction
============6==============
P0336
Raw code: 0336
ECU: Engine control unit
Status: Pending fault present, Test conditions are met, Validated and stored in non volatile memory
OBDII: Crankshaft position (CKP) sensor - range/performance problem
============7==============
P0341
Raw code: 0341
ECU: Engine control unit
Status: Pending fault present, Test conditions are met, Validated and stored in non volatile memory
OBDII: Camshaft position (CMP) sensor A, bank 1 - range/performance problem
============8==============
P1351
Raw code: 1351
ECU: Engine control unit
Status: Test is inhibited by other DTC, Validated and stored in non volatile memory
OBDII: Ignition Coil Control Circuit High Voltage
Citroen: IDM input circuit Malfunction/Ignition coil control circuit High voltage SID 803/EDC16C3 - Pre/Post heating relay circuit. Relay not controlled and glow plugs supplied.
============9==============
P2565
Raw code: 2565
ECU: Engine control unit
Status: Pending fault present during this driving cycle
OBDII: Turbocharger (TC) boost control position sensor - circuit high
============10==============
P1671
Raw code: 1671
ECU: Engine control unit
Status: Pending fault present during this driving cycle, Validated and stored in non volatile memory
Citroen: MM6LP - Cruise control.
============11==============
P0495
Raw code: 0495
ECU: Engine control unit
Status: Test conditions are met, Validated and stored in non volatile memory
OBDII: Engine coolant blower motor speed - high
============12==============
P0215
Raw code: 0215
ECU: Engine control unit
Status: Pending fault present, Test conditions are met, Validated and stored in non volatile memory
OBDII: Fuel shut-off solenoid - circuit malfunction
============13==============
P0336
Raw code: 0336
ECU: Engine control unit
Status: Pending fault present, Test conditions are met, Validated and stored in non volatile memory
OBDII: Crankshaft position (CKP) sensor - range/performance problem
============14==============
P0341
Raw code: 0341
ECU: Engine control unit
Status: Pending fault present, Test conditions are met, Validated and stored in non volatile memory
OBDII: Camshaft position (CMP) sensor A, bank 1 - range/performance problem
============15==============
P1351
Raw code: 1351
ECU: Engine control unit
Status: Pending
OBDII: Ignition Coil Control Circuit High Voltage
Citroen: IDM input circuit Malfunction/Ignition coil control circuit High voltage SID 803/EDC16C3 - Pre/Post heating relay circuit. Relay not controlled and glow plugs supplied.
============16==============
P1351
Raw code: 1351
ECU: Engine control unit
Status: Confirmed
OBDII: Ignition Coil Control Circuit High Voltage
Citroen: IDM input circuit Malfunction/Ignition coil control circuit High voltage SID 803/EDC16C3 - Pre/Post heating relay circuit. Relay not controlled and glow plugs supplied.

[gustav]

The car is manufactured nov 2009 from what I understand VF7**************[VIN obfuscated, can be read by forum staff].

Could the main relay be the bad guy in my case?

[GiveMeABreak]

Oh, just a few codes then Gustav!

Ignore all the P1351 codes - they are just Glow Plug related and just about every HDI has this code. It will take me a while to get the other info posted up, so check back in a year or 2 (just kidding 20 minutes or so....)

[GiveMeABreak]

Here you go:

Fault Code:	P2565
Description of Fault:	Turbocharger position copy signal - Voltage above the maximum threshold. Voltage higher than 4.95 V for more than 500 ms.
Conditions for Fault to clear:	Ignition on
Downgrade Modes whilst Fault is active:	Torque limitation for traction control; Deactivation speed limiter until the next time the ignition is switched on; Deactivation cruise control until the next time the ignition is switched on; The ECU stops the regulation of the EGR valve.
Symptoms:	Noise, Diesel fuel consumption a bit higher, Lack of power
Suspect Areas:	Turbocharger position copy sensor, Electrical harness or Connector.

Fault Code:	P1671
Description of Fault:	Cruise control: Reference speed outside the tolerance
Conditions for Fault to clear:	Ignition On
Downgrade Modes whilst Fault is active:	-
Symptoms:	-
Suspect Areas:	-

Fault Code:	P0495
Description of Fault:	Cooling Function Incorporated in the ECU ( electric cooling fan unit): Coherence between cooling fan fast speed and the reference. The fan unit is controlled at low speed and the actual speed is not low speed or if the fan unit is not controlled but even so is engaged.
Conditions for Fault to clear:	Driving for 5 minutes
Downgrade Modes whilst Fault is active:	Air conditioning cut-off Reduction in the activation thresholds for the coolant temperature alert
Symptoms:	-
Suspect Areas:	Electric cooling fan unit

Fault Code:	P0215
Description of Fault:	Supply relay control: Short circuit to earth or short circuit to positive or open circuit. Main relay stuck
Conditions for Fault to clear:	The following conditions have to be met - Engine idling (For several seconds) - Engine cut following a phase in which the engine management ECU becomes dormant
Downgrade Modes whilst Fault is active:	-
Symptoms:	Starting problem
Suspect Areas:	Engine fuse box; Electrical harness; Connector

Fault Code:	P0336
Description of Fault:	Engine speed signal: Absence of signal under starter. Absence of signal from the engine speed sensor on starting.
Conditions for Fault to clear:	Under Starter
Downgrade Modes whilst Fault is active:	-
Symptoms:	Starting problem
Suspect Areas:	Engine speed sensor; Engine speed sensor target; Electrical harness; Connections

Fault Code:	P0341
Description of Fault:	Camshaft signal: Loss of synchronisation. No synchronisation for 2 to 3 engine revolutions between the engine speed sensor and the camshaft sensor for making the 1st injection.
Conditions for Fault to clear:	Under Starter
Downgrade Modes whilst Fault is active:	-
Symptoms:	Starting Problem
Suspect Areas:	Engine speed sensor target; Engine speed sensor; Camshaft sensor; Timing; Electrical harness; Connector

[gustav]

Thanks Marc!
Can the above be triggered by a another common fault that can explain and are connected to the total cut out? Main fuses? Main relay? Main earth? I have no starting issues what so ever.....

[admiral51]

The only thing that seems to be common is Electrical Harness/Connector and to me along with known issues with the fuse box and an 11 year old car i would plump for the main culprit being the fuse box.

[GiveMeABreak]

Yes, I would also reckon on the fuse box if you have checked the Fuses and the electrical connections. A cut-out like that is rare and likely to be an electrical failure of a main component, so I too would suggest the fuse box / relay component is damaged / failing.