Vn cranks over but won’t start

[MikeC]

I’ve checked for codes and I only get code 12 pretty sure this means everything is all good.

Yep. Code 12 means no malfunction codes are stored. The problem lies in something not checked by the ECM.

 

[BlackVXGTS]

From memory, the VN Calais had a key lock in the door cavity of (I think) the passenger front door, that lets you turn off the immobiliser. Give that a try.

 

[HonoraryPants20]

From memory, the VN Calais had a key lock in the door cavity of (I think) the passenger front door, that lets you turn off the immobiliser. Give that a try.

It does have a lock in the glovebox but we have had the car for almost a year and do not have the key. Might be worth getting a key made up as I’m not sure what else to really try.

 

[MikeC]

No need to buy the Zadi key:
https://www.google.com/url?sa=t&rct...izer.225316/&usg=AOvVaw3hW1ea7XCXoVvhpOCttvBp

 

[HonoraryPants20]

No need to buy the Zadi key:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjHl9f869_xAhXt7HMBHYvuCdYQFnoECAcQAA&url=https://forums.justcommodores.com.au/threads/zadi-key-lock-wont-work-to-switch-off-engine-immobilizer.225316/&usg=AOvVaw3hW1ea7XCXoVvhpOCttvBp

No need to buy the Zadi key:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjHl9f869_xAhXt7HMBHYvuCdYQFnoECAcQAA&url=https://forums.justcommodores.com.au/threads/zadi-key-lock-wont-work-to-switch-off-engine-immobilizer.225316/&usg=AOvVaw3hW1ea7XCXoVvhpOCttvBp

I have disconnected the cars battery and taken out the zadi lock and reconnected the battery with no lock plugged in and tried cranking the car over which it does the exact same thing as before so I’m thinking it might be something to do with the lock because disconnecting it had no effect which I assume it should?

 

[MikeC]

If you joined the 2 pink wires the lock is effectively bypassed. If the lock caused the problem the car should now start.

 

[HonoraryPants20]

If you joined the 2 pink wires the lock is effectively bypassed. If the lock caused the problem the car should now start.

So I joined the 2 pink wires together and the car still refuses to actually start still just cranks over. I’m possibly thinking could it be an issue with the oil pressure switch making the car think it’s not building oil pressure and therefore not letting it run? is there anyway to bypass the oil pressure switch just to check if that’s the issue

 

[HonoraryPants20]

If you joined the 2 pink wires the lock is effectively bypassed. If the lock caused the problem the car should now start.

If you joined the 2 pink wires the lock is effectively bypassed. If the lock caused the problem the car should now start.

Also would it be worth grabbing another ECU to test incase the current one has some issue. My brother has a factory manual VN would his ECU work to start the auto Calais or would I run into issues? Also do you happen to know if an auto VS ecu would work by any chance as I have one laying around thanks.

 

[MikeC]

So I joined the 2 pink wires together and the car still refuses to actually start still just cranks over. I’m possibly thinking could it be an issue with the oil pressure switch making the car think it’s not building oil pressure and therefore not letting it run? is there anyway to bypass the oil pressure switch just to check if that’s the issue

Feed 12V into the violet wire in the ALDL connector.

 

[woteva]

Bridge the fuel pump relay.

I have a lead with a spade terminal on each end for occasions like this