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disco 4 wont start after bump
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melox2
 


Member Since: 08 Aug 2007
Location: derby
Posts: 21

England 2006 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3
disco 4 wont start after bump

Hi All ,

can any one help with this one , 62 plate disco 4 after front bump wont start but turns over , autobox and handbrake releases used to move car ,do you just put the gearbox emergency lever back and it will go in to gear obviously when engine running or does it need resetting , any help would be appreciated

thanks guys
  
Post #19206461st Mar 2018 1:22 pm
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G_Cam
 


Member Since: 12 Aug 2010
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Scotland 2013 Discovery 3 3.0 TDV6 Commercial XS Auto Fuji WhiteDiscovery 3

Not my area of knowlege...
But given the lack of response.....

Iirc there is no fuel solanoid cut off reset button as such on the D4. I think you might need to carry out some form of ingintion sequence reset OR reset it with the likes of an iid.. im sure there is an electronic marker that cuts the fuel off following a bump vs a manual switch...

Have you checked the user manual?

Please feel free to add or correct as it is not my area of expertise.....
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Post #19208061st Mar 2018 6:05 pm
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Robbie
 


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Depends on how hard you hit something. The vehicle could have entered crash mode or just disturbed a wiring loom somewhere.

Without diagnostic info we really don't have a chance to properly diagnose it.
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Post #19208111st Mar 2018 6:09 pm
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mz mini
 


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United Kingdom 2013 Discovery 4 3.0 SDV6 XS Auto Siberian SilverDiscovery 4

Robbie out of curiosity might I ask what is crash mode is please Thumbs Up
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Post #19208121st Mar 2018 6:13 pm
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melox2
 


Member Since: 08 Aug 2007
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England 2006 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

yes crash mode sounds one direction but dont understand what that involves ,so would think plug in to see what shows
  
Post #19208281st Mar 2018 6:34 pm
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beanie
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England 2013 Discovery 4 3.0 SDV6 GS Auto Fuji WhiteDiscovery 4

It's after it's been crashed Chris Laughing

The RCM (restraints control module) is installed on the top of the transmission tunnel, in line with the B pillars, and controls operation of the SRS. The main functions of the RCM (restraints control module) include:

A safing sensor in the RCM (restraints control module) provides confirmation of an impact to verify if air bag and pretensioner activation is necessary. A roll-over sensor monitors the lateral attitude of the vehicle. Various firing strategies
are employed by the RCM (restraints control module) to ensure that during an accident only the appropriate air bags and pretensioners are fired. The firing strategy used also depends on the inputs from the safety belt switches and the
occupant monitoring system.

An energy reserve in the RCM (restraints control module) ensures there is always a minimum of 150 milliseconds of stored energy available if the power supply from the ignition switch is disrupted during a crash. The stored energy is sufficient to produce firing signals for the driver air bag, the passenger air bag and the safety belt pretensioners.


When the ignition is switched on the RCM (restraints control module) performs a self test and then performs cyclical monitoring of the system. If a fault is detected the RCM (restraints control module) stores a related fault code and
illuminates the SRS (supplemental restraint system) warning indicator. The faults can be retrieved by T4 on a dedicated link between the RCM (restraints control module) and the diagnostic socket. If a fault that could cause a false fire signal is detected, the RCM (restraints control module) disables the respective firing circuit, and keeps it disabled during a crash event.
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Last edited by beanie on 1st Mar 2018 6:37 pm. Edited 1 time in total 
Post #19208291st Mar 2018 6:34 pm
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mz mini
 


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Mr Beanie the second word is off that's an Iggy answer Thumbs Up
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Post #19208301st Mar 2018 6:36 pm
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Aerialmark
 


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Not sure that was the answer Chris was looking for Greg Rolling with laughter
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Post #19208311st Mar 2018 6:36 pm
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beanie
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I know, but wanted to wind him up whilst I added the rest Rolling with laughter
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Post #19208321st Mar 2018 6:38 pm
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mz mini
 


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Thanks Mr Tolstoy not as long as your other novel but very interesting Bow down Bow down
brilliant answer thanks Greg Thumbs Up
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Post #19208371st Mar 2018 6:43 pm
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TigerRecovery
 


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Re: disco 4 wont start after bump

melox2 wrote:
Hi All ,

can any one help with this one , 62 plate disco 4 after front bump wont start but turns over , autobox and handbrake releases used to move car ,do you just put the gearbox emergency lever back and it will go in to gear obviously when engine running or does it need resetting , any help would be appreciated

thanks guys


If the transmission isn't in Park, it wont allow it to start. Put the emergency park release back into it's normal position and cycle the ignition, that will allow everything to realign to park and enable the engine to start.

I am surprised it turns over so it could be the fuel system's been turned off due to the crash.
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Post #19208451st Mar 2018 6:51 pm
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beanie
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Can't take the credit, it's from a post Wiggs did some years ago Thumbs Up
 Altox GSM FBH controller thread


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PM me for details




Owner of the original "Beanie" grille
D4 & RRS style D3 grilles made to order
  
Post #19208461st Mar 2018 6:52 pm
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melox2
 


Member Since: 08 Aug 2007
Location: derby
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England 2006 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3
Re: disco 4 wont start after bump

TigerRecovery wrote:
melox2 wrote:
Hi All ,

can any one help with this one , 62 plate disco 4 after front bump wont start but turns over , autobox and handbrake releases used to move car ,do you just put the gearbox emergency lever back and it will go in to gear obviously when engine running or does it need resetting , any help would be appreciated

thanks guys


If the transmission isn't in Park, it wont allow it to start. Put the emergency park release back into it's normal position and cycle the ignition, that will allow everything to realign to park and enable the engine to start.

I am surprised it turns over so it could be the fuel system's been turned off due to the crash.





oh ok , whats is cycle of the ignition ?
  
Post #19209101st Mar 2018 8:03 pm
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melox2
 


Member Since: 08 Aug 2007
Location: derby
Posts: 21

England 2006 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

first time looked at vehicle this weekend gone through a few checks and am hoping someone can give further input please .

car is now live and in park
does a system check and comes up with engine system fault
checked plugs behind battery they are ok
checked fuses all seem good
fuel is getting to the injector rail
checked injector circuit and no power to harness on all injectors .

what would be the best tool to plug in and would it show the fault , Hawkeye or IIDTool BT

would appreciate further thoughts ,thanks in advance

Rolling Eyes
  
Post #192495811th Mar 2018 2:19 pm
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