Test Point 21 - Warning lamp, check engine
TEST POINT 21 - Warning lamp Check Engine - Fault code 1_45Possible Causes, Elimination, Remarks
A ground signal is fed from the control unit - terminal 21 - to the "Check Engine lamp", causing this lamp to come on when an emission control component fails.
If the "Check Engine" warning lamp fails, this fault is stored in the fault memory.
Check by supplying ground to disconnected Digital Motor Electronics DME control unit plug terminal 21 and switching on ignition. The Check Engine lamp must now come on.
To replace a faulty display lamp, always use the.specified bulb.
For more information on the check engine lamp, Without Scan Tool