iceman
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Registered: 22nd Jul 00
Location: Berkshire
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I had the corsa Tech1'd a couple of days ago and it come up with 2 faults
1) Knock sensor open circuit
2) Qdm something ( I cant remember what )
I've put on a new knock sensor but the engine management light is still on and the car wont rev about 5k, it feels like its hitting the limiter. I've given it a full service ( Plugs, oil, filter,air filter, fuel filter)
Can anyone help?
Stu
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J100RSA
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Registered: 4th Mar 01
Location: Thornhill, West Yorkshire
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what engine stu??
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iceman
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Registered: 22nd Jul 00
Location: Berkshire
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x14xe corsa
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bubble
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Registered: 24th Jan 04
Location: Darwin, NT Australia.
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qdm means Quad Driver Module. normally come up when thinks car is extremely low on oil. if knock sensor is open circuit then it will throw up QDM, knock sensor is used to detect low oil level when the engine knocks.
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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in my experience the QDM fault is a knackered ecu. Had this twice, swopped ecu's and it was fine.
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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quote:
Originally posted by bubblevaux
qdm means Quad Driver Module. normally come up when thinks car is extremely low on oil. if knock sensor is open circuit then it will throw up QDM, knock sensor is used to detect low oil level when the engine knocks.
the knock sensor is used to detect engine knock or 'pre-ignition' and adjusts the ignition timing to suit. it has no connection to low oil levels
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iceman
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Registered: 22nd Jul 00
Location: Berkshire
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ive changed the knock sensor for a brand new 1
What do you rekonmend i do next? change the ecu?
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jazzer2k3
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Registered: 24th May 03
Location: **SHEFFIELD**
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knocksensor is a shocker for goin wrong, i remember my engine swap - i had exactly same thing ... But figured out it was a c16xe wiring loom not x 
Ye jus change the ecu
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iceman
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Registered: 22nd Jul 00
Location: Berkshire
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anyone got 1 i could try pls 
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broster
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Registered: 6th Dec 02
Location: Drives: E39
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quote:
Originally posted by Dave A
quote:
Originally posted by bubblevaux
qdm means Quad Driver Module. normally come up when thinks car is extremely low on oil. if knock sensor is open circuit then it will throw up QDM, knock sensor is used to detect low oil level when the engine knocks.
the knock sensor is used to detect engine knock or 'pre-ignition' and adjusts the ignition timing to suit. it has no connection to low oil levels
detects noise, if its low on oil engine will get noisey lol
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jazzer2k3
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Registered: 24th May 03
Location: **SHEFFIELD**
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U wanna give cos vaux a ring ... if ur close to it ??
Thats an awsome place for ECU's and the like, ive got one spare .. but i jus relised urs is 2L 
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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quote:
Originally posted by broster
quote:
Originally posted by Dave A
quote:
Originally posted by bubblevaux
qdm means Quad Driver Module. normally come up when thinks car is extremely low on oil. if knock sensor is open circuit then it will throw up QDM, knock sensor is used to detect low oil level when the engine knocks.
the knock sensor is used to detect engine knock or 'pre-ignition' and adjusts the ignition timing to suit. it has no connection to low oil levels
detects noise, if its low on oil engine will get noisey lol
detects vibrations actually
anyway if it was low enough on oil to start knocking then the engine is probably knackered.
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iceman
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Registered: 22nd Jul 00
Location: Berkshire
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not low on oil the car has just been serviced 
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iceman
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Registered: 22nd Jul 00
Location: Berkshire
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its not knocking the engine is sweet
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bubble
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Registered: 24th Jan 04
Location: Darwin, NT Australia.
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quote:
Originally posted by Dave A
quote:
Originally posted by bubblevaux
qdm means Quad Driver Module. normally come up when thinks car is extremely low on oil. if knock sensor is open circuit then it will throw up QDM, knock sensor is used to detect low oil level when the engine knocks.
the knock sensor is used to detect engine knock or 'pre-ignition' and adjusts the ignition timing to suit. it has no connection to low oil levels
er yeah......and engines knock to low oil level
most of the eml jobs at work are z16se astra's showing knock control circuit due to low oil level.
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Joe
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Registered: 20th Jun 04
Location: Hesketh Bank, Lancashire
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Yeah we have alot of that too, usually z16xe's with about 1 litre of oil left.
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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but an engine wont knock if theres oil in it.
for an engine to knock because of low oil it would need to be so low that the oil pickup is sucking air. but by that time the oil pressure light would be on.
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iceman
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Registered: 22nd Jul 00
Location: Berkshire
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the engines fine the knock sensor was knackered hense why it was bring up an open circut its the qdm error code that is worrying me as the car wont rev over 4900
[Edited on 15-08-2006 by iceman]
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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qdm = dead ecu IMO
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iceman
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Registered: 22nd Jul 00
Location: Berkshire
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oh if the ecu was dead the car shouldnt run should it?
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csweatherston
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Registered: 16th Jan 06
Location: Devon
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i had this problem......qdm - then all of a suddon it cleared itself lol
new ecu from vaux was £400ish iirc
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