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Originally Posted by troverman
The Range Rover won't start. Relay 16 (Starter Motor Relay) gets no ground signal from the BeCM; thus the engine does not crank. Jumping those terminals spins the engine over, but does not start the engine, even with the ignition on. Traced the ground that should be appearing on the relay when the key is turned to start, and it goes to a white / red wire into the yellow plug on the front of the BeCM. There is continuity, so no break. BeCM was replaced in the year 2000. Alarm seems to work fine; locks / unlocks as usual. When attempting to start, all the warning lights come on as usual, ABS pump, etc. Fuel pump runs momentarily and then shuts off unless I jump that relay where it runs continuously. It gets the ground signal, as do the rest of the relays. Nothing else is different with the vehicle, every single other function works fine--no sign of impending BeCM failure at all. I have tried everything and need help. First--why won't the car start when the ignition is on and the starter relay terminals are jumped (car cranks over?) Is the car immobilized somehow? On the BeCM it is the yellow plug (larger one I think) terminal #2 white / red striped wire which should be sending the ground signal. Its not. What is the condition which causes the BeCM to send that ground signal? Ignition switch prob? Ignition switch operates everything else fine. The BeCM clicks when you turn the key to start. Car has 139k on it runs great. Just drove it somewhere and then home, ran fine, then it wouldn't start. Died across the street and had to use the RR Classic to drag it home in transfer neutral.
Any ideas? ETM BeCM chart?
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Hi TROVERMAN,
You are obviously comfortable with electrics so here goes,unbolt and carefully lift the under bonnet fusebox (risk of shorting out) locate C508 pink 8 way connector underneath the fusebox and using a voltmeter to earth,backprobe pin 1 brown/red,with ignition in crank position if you see battery voltage then the brown/red wire or starter solenoid are at fault.
Next locate C177 slate/grey 8 way connector,should be next to C508. Disconnect it and with voltmeter to earth,probe the fusebox pin that relates to the white/red terminal in the block,with ignition off you should get battery voltage. If you don't then the fault lies within the fusebox assy or the relay.
So lastly,assuming you do see battery voltage,access C113 yellow 10 way at the BeCM (front,top right). Disconnect and voltmeter to earth,probe pin 2 white/red,you should see battery voltage. If you don't then the white/red wire is faulty,if you do then test the ignition switch and the earth to the ignition switch. If they check out ok,i'm sorry to say it sounds like a BeCM internal failure.
Hope this is of use to you and that you can sort it out ok.
Mick
