BPM-Body Processor v10
• 0x55 Body Control Unit superlock relay short to ground
• 0x51 Body Control Unit unlock relay short to ground
• 0x53 Body Control Unit lock relay short to ground
• 0x81 Servo-valve or connections short circuit
• 0x80 Servo-valve or connections open circuit


short to ground/ short circuit/ what dose it mean
if there was a short, wouldn't it blow a fuse or fry the wiring RR 2005 4.4 petrol
Any spelling mistakes are the fault of spellchecker
Previous MG J2, CITROEN light 15 x 2 gone unfortunately
Present MERC 180e, RANGE ROVER L322, JAGUAR XJS, MERC 280SE, MG F, JAGUAR S-Type 6v 2003, jaguar s-type 8v 2004, Ford Cougar

Some short to ground faults are caused by open circuit because the test detects 0V at the test point when 12V or thereabouts is the voltage when all is working.

Many electrical circuits in a Rangie are controlled by transistors that have a 4th pin that reports loading to a monitor inside the controlling module. Overloads (like shorts to ground) get detected immediately they occur and the controlling transistor is switched OFF before any damage occurs. Then the monitor invokes an alternative process (if possible) and flags the error.

eg, if a tail light is blown then a brake light will be fast flashed at ~50% pulse width to 'simulate' the tail light brightness.

bye. 2003 TD6, EGR delete, vortex crankcase breather update, performance chip, UHF 2 way, Android head unit, crash camera on dash, always-on rear view camera to mirror screen, LED DRL`s, Electric trailer brake controller. FSR replaced. Pulling 3T caravan all about Australia

WOW, thanks for that fellers
that puts a different light on every thing

am i right in thinking the fault would have to be in the BPM processor
every thing seems to work most of the time and the fault has not returned yet, fingers crossed RR 2005 4.4 petrol
Any spelling mistakes are the fault of spellchecker
Previous MG J2, CITROEN light 15 x 2 gone unfortunately
Present MERC 180e, RANGE ROVER L322, JAGUAR XJS, MERC 280SE, MG F, JAGUAR S-Type 6v 2003, jaguar s-type 8v 2004, Ford Cougar