Anyone Want To Take A Guess At The Problem?
#1
06-30-2012, 01:07 AM
Anyone Want To Take A Guess At The Problem?
This is not my Disco we are talking about here. It's just one a buddy of mine is looking at on Craiglist, we have no gone to see it in person yet. So all I have to go by is what the current owner says in the advertisement. Here is a direct copy/paste
"This is a 2000 model land rover discovery. It currently does not start because of a key malfunction. The car will turn over but will not start."
"This is a 2000 model land rover discovery. It currently does not start because of a key malfunction. The car will turn over but will not start."
Last edited by Street Wolf; 06-30-2012 at 01:09 AM.
#2
06-30-2012, 06:54 AM
Super Moderator
Crank Shaft Position Sensor. Fuel pump / inertia switch. BCU and ECU not talking.
If CKP, one of those $8 spark plug wire testers from parts store (looks like an ink pen) that you hold against a plug wire won't be flashing when cranking. The ECU has to see maybe 80 rpm to keep fuel pump on. Of course stored codes may point somewhere else.
If immobilized, LED on dash will be indicating a specific pattern. But usually immobilization inhibits cranking via BCU.
If CKP, one of those $8 spark plug wire testers from parts store (looks like an ink pen) that you hold against a plug wire won't be flashing when cranking. The ECU has to see maybe 80 rpm to keep fuel pump on. Of course stored codes may point somewhere else.
If immobilized, LED on dash will be indicating a specific pattern. But usually immobilization inhibits cranking via BCU.
#3
06-30-2012, 07:12 AM
Rock Crawling
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#4
06-30-2012, 07:43 AM
Super Moderator
A good point, sorry I goofed. Here's some more info on that point:
off, the LED flashes two pulses of 50 ms on, 50 ms off, every 10 seconds.
Immobilisation
For immobilisation, the BCU disables the starter motor relay. When the engine is cranking, the ECM looks for a coded signal from the BCU. If the signal is not received within one second of cranking, the fuel supply to the engine is stopped and the injectors are disabled. This also prevents unburnt fuel from entering the catalyst. If the BCU is disconnected, the engine starter motor will remain isolated by the starter motor relay and the ECM will remain immobilised. The main wiring for the system is contained within the main harness which is relatively inaccessible, so preventing intruders from disabling the system by cutting the wires for the immobilisation system. Once the immobiliser has been activated, destruction of the trigger device or the wiring to it will not disarm the system. The RF transmitter communicates to the BCU via the RF receiver using a 70 bit code. Pressing the unlock button on the transmitter will re-mobilise the vehicle.
and
and
Input/Output
The LED has a dedicated signal from the BCU to indicate the status of the following:
l
Alarm armed: The LED flashes at 10 Hz with a 50:50 duty cycle for 10 seconds, after which the LED flashes 50
ms on, 2 seconds off until the state of the system changes.
ms on, 2 seconds off until the state of the system changes.
l
Engine immobilised: If the engine is immobilised and the ignition is on, the LED is illuminated continuously. If the
engine is immobilised and the ignition is off, the LED flashes 50 ms on, 2 seconds off.
engine is immobilised and the ignition is off, the LED flashes 50 ms on, 2 seconds off.
l
Alarm tampered: If the alarm has been triggered, the LED flashes at 10 Hz with a 50:50 duty cycle.
l
Handset battery low indicator: If the handset battery is low, the driver's door is open and the ignition is switched
off, the LED flashes two pulses of 50 ms on, 50 ms off, every 10 seconds.
#6
06-30-2012, 12:19 PM
Super Moderator
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