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Old 1st January 2019, 17:49   #11
klarzy
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Quote:
Originally Posted by daznkel View Post
Thanks for the offer Brian. Much appreciated

Just returned home.

I removed the fusebox and cleaned every connection with contact cleaner. I then checked every fuse and fuseable link, all to no avail.

I then checked the continuity on the loom from the ECU to the injectors and all was fine.

I then re-ran my original tests and whilst measuring the cam sensor, realised I am only measuring Vbatt on the yellow wire with the cam sensor disconnected. When connected, I am reading 0V. Am I correct in thinking that the cam sensor has failed, short and is pulling the voltage down to ground?
if I understand correctly, if the tacho is moving to circa 200 rpm then your cam sensor is working...

I would follow Brian's hint...
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Old 1st January 2019, 18:08   #12
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Bit of info that might be of help.---


http://www.the75andztclub.co.uk/foru...d.php?t=109615
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Old 1st January 2019, 20:46   #13
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Please try the electrical connector to the low pressure fuel module on top of the fuel filter, pull it out clean with switch cleaner push back in. good luck
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Old 1st January 2019, 21:22   #14
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Please try the electrical connector to the low pressure fuel module on top of the fuel filter, pull it out clean with switch cleaner push back in. good luck
If TOAF is showing 3.5 Bar on the LP side, the sensor is working

Just out of curiosity, what fault codes if any are stored?

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Old 1st January 2019, 22:34   #15
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Quote:
Originally Posted by klarzy View Post
if I understand correctly, if the tacho is moving to circa 200 rpm then your cam sensor is working
Thanks Klarzy, but isn't that the Crank sensor, or is it relevant for both the Crank and Cam Sensors?

Quote:
Originally Posted by marinabrian View Post
If TOAF is showing 3.5 Bar on the LP side, the sensor is working
Cheers Brian. This has also been confirmed with a multimeter measuring approx 4V when the pumps are running. Key in pos 2.

HP rail seems ok too. 0.5V key in pos 2, 1.25V when cranking.

Quote:
Originally Posted by marinabrian View Post
Just out of curiosity, what fault codes if any are stored?
I will read the codes with TOAF again tomorrow and report back.

I have attached a couple of screenshots from TOAF, when originally connected. The first is with the key in pos 2, the second when cranking.

Cheers.
Attached Images
File Type: jpg Pos 2.jpg (97.5 KB, 30 views)
File Type: jpg While cranking.jpg (98.0 KB, 23 views)
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Old 2nd January 2019, 12:30   #16
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Bit of info that might be of help.---


http://www.the75andztclub.co.uk/foru...d.php?t=109615
No response so I guess this was of no use to you.


Pity as it seems to be quite comprehensive by French Mike.------
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Old 2nd January 2019, 12:39   #17
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No response so I guess this was of no use to you.
I appreciate the link Jon, thank you. However, I had already followed Frenchmike's guide in order to get the original measurements.
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Old 2nd January 2019, 13:36   #18
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I have just returned from having the car connected to TOAF again.

Screen shots attached and description below;

1. Errors stored
2. Expansion of Glow Plug error
3. Expansion of RPM error
4. Group 1 Measurements (Key in position 2) Shows good low pressure
5. Group 1 Measurements (Whilst cranking engine) Shows good high pressure
6. Group 2 Measurements (Key in position 2)
7. Group 2 Measurements (Whilst cranking engine)

More in the next post.......
Attached Images
File Type: jpg errors stored.jpg (84.2 KB, 13 views)
File Type: jpg glow plug error.jpg (94.4 KB, 13 views)
File Type: jpg rpm error.jpg (95.8 KB, 14 views)
File Type: jpg Pos 2.jpg (97.5 KB, 11 views)
File Type: jpg While cranking.jpg (97.9 KB, 11 views)
File Type: jpg Group 2 keypos 2.jpg (97.3 KB, 6 views)
File Type: jpg Group 2 cranking.jpg (97.3 KB, 9 views)
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Old 2nd January 2019, 13:42   #19
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I then cleared all faults switched off ignition, then back to position 2 and re-read the errors stored.

1. Air Mass Meter error (The MAF is disconnected as it is U/S at the moment so may be responsible for this error)
2. Temperature sensor error (Again the MAF is disconnected as it is U/S at the moment so may be responsible for this error)
3. Glow device error???

Again any help, is greatly appreciated.
Attached Images
File Type: jpg After clearing 1.jpg (91.6 KB, 7 views)
File Type: jpg After clearing 2.jpg (91.5 KB, 3 views)
File Type: jpg After clearing 3.jpg (90.9 KB, 3 views)
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Old 2nd January 2019, 14:11   #20
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Forget the glow plug error, and as you have the MAF disconnected that should account for the other errors.

When you crank it again do you get the rpm error return? If so then it could be a fault with the crank sensor or wiring to it.

One strange thing looking at the TOAF data it shows both capacitor readings as 29 volts. Earlier cars should be around 80 volts, and later cars one around 80 and the other around 29 if I remember correctly. The capacitors are used in the injector circuit.


It also shows 6 cylinders, so that isn't right, and a battery voltage of 9.8 - is that a normal voltage drop when cranking? Will check mine later.
I don't use TOAF so don't know if it is a true voltage reading or not, but T4 would point out a capacitor fault if you had one.

Last edited by Mike Noc; 2nd January 2019 at 14:27..
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