Gav00353
Member Since: 19 Oct 2009
Location: Leitrim
Posts: 131
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Hi Chaps ive recently bought another d3 commercial with the airbags blown, the car has been repaired but the airbags now need replacing by me, ive got the two front airbags but have been told by LR I need an airbag module as well! is this true? what purpose does the module have? can it be reset by faultmate?(wrong forum I know).
Thanks Gav.
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 31st Aug 2010 9:58 pm |
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wiggs
Member Since: 03 Sep 2006
Location: Manchester
Posts: 14368
  
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Some info for ya....
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:
ô€º Crash detection and recording.
ô€º Air bag and pretensioner firing.
ô€º Self test and system monitoring, with status indication via the SRS (supplemental restraint system) warning lamp and non volatile storage of fault information.
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. G4 Gone ...but not forgotten
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| 31st Aug 2010 10:19 pm |
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