It's probably just a thermistor so if you measure its resistance you might find its short circuit. I doubt it's open circuit as it goes full hot.Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500
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18th Feb 2017 8:32 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10363
Oil temp also drives the gauge. And aren't they unreliable
Don't think you can say they are unreliable. My D3 had one changed in 234000miles - and that was when the engine was changed at 121k - and it wasn't faulty then!
Yes the oil sensor can fail, but not exactly in the same league as brake light switches or oil pumps!Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500
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Disco Picture Website Here
18th Feb 2017 9:28 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Pete K wrote:
Oil temp also drives the gauge. And aren't they unreliable
Different circuits but they draw upon the same 5v source at the PCM one can pull down the other with certain faults. You know when you have an oil temp issue as the revs at idle go nuts.
This particular fault does look like a vanilla ECT issue, so a cheap fix.
Land Rover - Turning Drivers into Mechanics Since 1948
Essentially remove the plug from the sensor and use a DVM on resistance and measure its resistance across the two pins of the plug. As it's a new sensor, it should be fine.
If it has a value, then either go back to the socket on the car and see if you have voltage at the plug. I would expect 5v on the one terminal relative to the other - if you get nothing try each pin in turn to ground. If you then get a voltage, you have an earth fault, if still nothing, the you have an issue with the feed from the Engine control module ecu. The wire number is C0634-68 according to the diagram I have. But where that actually is on the unit, I can't help. Logic tells me it's terminal 68 - but it is a Land Rover !Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500
_________________________________________________
Disco Picture Website Here
Back from garage with no look. List of work carried out:
Got the car back from the garage today and still have the same issue. Provided them with the notes above and still no look. Thankfully they given a PDF document listing thier fault finding.
Looking at the notes below does anyone else have any suggestions what my next move with this fault should be?
CHECKED COOLANT TEMP GAUGE SENSOR OK - 37000 RESISTANCE
CHECKED WIRING VOLTAGE FROM ECU - 5 VOLTS - OK
CHECKED SIGNAL WIRE AC2 IGNITION ON 3.1 VOLTS AT 20 oC
CHECKED EARTH WIRE
PLUGGED IN COMPUTER AND FOUND THE FOLLOWING FAULT CODES -
C1A20 - PRESSURE INCREASE TOO SLOW (SUSPENSION)
P1401 + P0405 - EGR FAULTS
P02A2 + P121A - CYLINDER BALANCE
P0579 - SPEED CONTROLP0118 - ENGINE COOLANT TEMP CIRCUIT HIGH INPUT.
DELETED ALL FAULT CODES FROM SYSTEM BUT HAVE RETURNED
CHECKED ALTERNATOR - CHARGING RATE 14.4 VOLTS - OK
REMOVED EARTH LEAD AND CARRIED OUT BATTERY RESET - FAULT
STILL PRESENT.
WOULD ADVISE NEXT STEP TO TAKE TO LANDROVER FOR A POSSIBLE
SOFTWARE UPDATE.
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