Morning all,
Jumped into the HDi last night to lower the suspension.
Met with a transponder light that doesn’t go off for 30 seconds but car starts.
This is not normal behaviour.
I am in a bit of a mess at present but do have the factory Coded Anti-theft Device manual somewhere. Where I have no idea as had a deep search for it last night!! Frustrating being unorganised.
Does anyone know the diagnostic procedure for working through this please?
Likely to be the transponder ring I believe.
With no Lexia at present and no spare key, it’s an ‘interesting’ position to be in.
https://share.icloud.com/photos/0c7QRoS ... x8bQF9a2xg
Xantia HDi Transponder - Imminent Fault
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Rhothgar
- (Donor 2026)
- Posts: 2515
- Joined: 22 Nov 2004, 00:21
- x 226
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Rhothgar
- (Donor 2026)
- Posts: 2515
- Joined: 22 Nov 2004, 00:21
- x 226
Re: Xantia HDi Transponder - Imminent Fault
Found it!
I thought it was an individual manual dedicated to Coded Anti Theft Device. Only problem is the date. It’s dated December 1997 for RPO 7668 onwards, which is fine, but I am sure there is a later one I have that I still have not been able to find.
I’ll work through this in the meantime.
I thought it was an individual manual dedicated to Coded Anti Theft Device. Only problem is the date. It’s dated December 1997 for RPO 7668 onwards, which is fine, but I am sure there is a later one I have that I still have not been able to find.
I’ll work through this in the meantime.
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Rhothgar
- (Donor 2026)
- Posts: 2515
- Joined: 22 Nov 2004, 00:21
- x 226
Re: Xantia HDi Transponder - Imminent Fault
Well. It seems I have a fault actually worth having!
Having gone through the earlier CATD Manual, everything works as it should bar the ECU locking!
Using the 1.2 Test Protocol (By removing the ignition on information) - Engine starts with Fuse F2 removed.
Using the 1.3 Test Protocol (Using the transponder warning lamp in the instrument panel) - The transponder lamp remains on the same amount of time on the seconding switching on of the ignition. It states that if the CPU does not have to unlock the ECU, the warning lamp should come on for a shorter period of time. It remains on for just over 30 seconds in both cases thus indicating that the ECU has not been locked.
The door-open warning lamp works so this allows me to narrow it down further:-
1. If the engine ECU has not been initialised, I guess that the car wouldn't be able to run. I also imagine that the ECU cannot un-initialise itself?
2. If the CPH has not been initialised then the transponder warning lamp would not come on when the ignition is switched on (I further assume that this means Key On Engine Off)
3. No electrical resupply to the engine ECU after switching off the ignition. I have not tested this as yet but will do at some point. This is where I suspect the fault lies.
4. There is no dialogue between the CPH and the engine ECU. Again, not checked but a check will, I believe, simply reveal that no change occurs at terminal 6 of the 26-way yellow connector of the CPH.
I never thought I would be reporting a fault worth having.
The question is, do I fix it and then find the car won't start by some strange coincidence!!!
Only thing now is that this potentially means that the CPH is faulty or am I clutching at straws on that point?
Having gone through the earlier CATD Manual, everything works as it should bar the ECU locking!
Using the 1.2 Test Protocol (By removing the ignition on information) - Engine starts with Fuse F2 removed.
Using the 1.3 Test Protocol (Using the transponder warning lamp in the instrument panel) - The transponder lamp remains on the same amount of time on the seconding switching on of the ignition. It states that if the CPU does not have to unlock the ECU, the warning lamp should come on for a shorter period of time. It remains on for just over 30 seconds in both cases thus indicating that the ECU has not been locked.
The door-open warning lamp works so this allows me to narrow it down further:-
1. If the engine ECU has not been initialised, I guess that the car wouldn't be able to run. I also imagine that the ECU cannot un-initialise itself?
2. If the CPH has not been initialised then the transponder warning lamp would not come on when the ignition is switched on (I further assume that this means Key On Engine Off)
3. No electrical resupply to the engine ECU after switching off the ignition. I have not tested this as yet but will do at some point. This is where I suspect the fault lies.
4. There is no dialogue between the CPH and the engine ECU. Again, not checked but a check will, I believe, simply reveal that no change occurs at terminal 6 of the 26-way yellow connector of the CPH.
I never thought I would be reporting a fault worth having.
The question is, do I fix it and then find the car won't start by some strange coincidence!!!
Only thing now is that this potentially means that the CPH is faulty or am I clutching at straws on that point?