99 Discovery 1 dead ignition

[MichaelKilleen]

I purchased a Discovery 1 V8i 3.9lt secondhand and have inherited the previous owners nightmares.

The Landie starts up first time everytime, but after travelling for around 20 minutes, if i switch off the vehicle it will not restart again. I need to leave it for around 30 min and then it will start.

Now unlike other posts that i've read, my vehicle does not stutter when driving, nor does it cut out whilst driving.

Its almost like the imobilizer has kicked in with the ignition. There is absolutely nothing when turning the key, its completely dead. It does however run start when in this condition, but it will not start using the key. It needs to sit for around 30 min and then it fires up.

Now i've also read where people suggest changing the crank shaft sensor, but i'm told that the Disco 1 does not have a crank shaft sensor.

I've considered doing a bypass on the spider, but would prefer to acurrately diagnose the problem.

I'm assuming one of the sensors is kicking in and stopping ignition.

Any advice would be much appreciated.

 

[MichaelKilleen]

I did a little research online and found this diagram explaining the coolant temp sensors role in the ignition process.

I'm hoping that i have a faulty coolant temp sensor, i'll replace it this weekend and see if it makes any difference.

 

[Tugela]

Where in Durban are you? I'm heading there next month to visit friends and family. If you need parts have you checked with Chard at LP4A in Pinetown? I've had good luck buying parts from there in the past.

 

[cdansan]

It was the starter solenoid sticking in my D1.
No start when hot, everything else worked but nothing when you turn the key.
Let it cool down for 30 minutes or so and it would fire right back up.

 

[p m]

Gloriously misleading thread title.

Connect the voltmeter or test light to the small terminal on the starter motor (feed for the starter solenoid).
If it shows 12V when you turn the key to the start position, then you need to replace the starter motor. Otherwise, it may be the alarm disabling the starter; one roundabout way to check for it is to disconnect and reconnect the battery.

 

[MichaelKilleen]

Thank you Gents, i appreciate your inputs.

I'm very interested in P M's suggestion of disconnecting the battery to see if its the alarm system interfering. I never thought of trying that, thanks. I thought about bypassing the spider, but may be jumping the gun before trying this suggestion.

 

[MichaelKilleen]

Thank you Gents, i appreciate your inputs.

I'm very interested in P M's suggestion of disconnecting the battery to see if its the alarm system interfering. I never thought of trying that, thanks. I thought about bypassing the spider, but may be jumping the gun before trying this suggestion.

 

[p m]

Thank you Gents, i appreciate your inputs.

I'm very interested in P M's suggestion of disconnecting the battery to see if its the alarm system interfering. I never thought of trying that, thanks. I thought about bypassing the spider, but may be jumping the gun before trying this suggestion.

My suggestion is pretty silly, but it happened to me in a NAS GEMS D1. My wife had to disconnect the battery every other attempt to start the truck.