| || ||Thread Tools||Search this Thread|
|27th May 2008, 10:57||#1|
Join Date: May 2007
Thanked: 88 Times
How intelligent is the 'engine check' light?
This may seem like a layman's query , but I had always wondered about the role of engine check indicator. I have never seen it light up after the engine coming to life! My query is, under what circumstances is the indicator supposed to remain lit?
|27th May 2008, 11:09||#2|
Join Date: Mar 2004
Thanked: 4,286 Times
|27th May 2008, 11:10||#3|
Senior - BHPian
Join Date: Feb 2004
Location: Hubli - Karnata
Thanked: 89 Times
I think the engine check light will only come on, if theres a prob with any of the engine functions that are assisted by the ECU.
I've had the check light come on my OHC vtec due to an "oxygen sensor" failure.
But i've heard that even if the speedo/tacho cable snaps, it should technically show the check light since both are connected to the ECU.
|28th May 2008, 23:50||#6|
Senior - BHPian
Join Date: Jul 2006
Thanked: 41 Times
In old baleno ECM check engine light can come on when ignition switch is on and engine running if fault is detected with -
engine coolant temperture sensor
throttle position sensor
intake air temperature
manifold absolute pressure esensor
camshaft position sensor
ignition fail safe signal
vehicle speed sensor
cpu of ecm .
new cars will be having lot more.
|29th May 2008, 00:13||#7|
Join Date: Aug 2004
Thanked: 14 Times
Whenever the ECM senses a malfunction (through its various sensors and equipment) that it cannot set right, the check engine light will activate. An error code will almost always be stored for future diagnosis.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|intelligent ECUs. how intelligent?||blacmagic||Technical Stuff||13||27th November 2009 19:19|
|Vista Tdi - Engine oil and the Check engine light turns ON||skartik2||Technical Stuff||4||27th August 2009 14:50|
|Intelligent Light Booster System For Car Headlight||ankitahuja||Modifications & Accessories||15||15th January 2009 15:59|
|"Check Engine" Light!||adman77||Modifications & Accessories||22||31st July 2007 15:44|
|Check engine light mystery||gbpscars||Technical Stuff||7||4th December 2006 23:12|