Test Point 2 - Engine Temp. Sensor
TEST POINT 2 - Engine temp. sensor (NTC II/Ohms) - Fault code 1_14Possible Causes, Elimination,Remarks
Using System Tester 9288, the engine temperature can be read off directly in menu item Actual values'.
IF no is not plausible display:
Connect ohmmeter to terminal 45 and terminal 30 of the disconnected Digital Motor Electronics (DME) control unit plug with the help of test leads.
Display at:
0°C (32° F) = 4.4 - 6.8k Ohms
15-30°C (59-86° F) = 1.4 - 3.6k Ohms
40°C (104° F) = 1.0 - 1.3k Ohms
80°C (176° F) = 250 - 390 Ohms
100°C (212° F) = 160 - 210 Ohms
NOTE: The temperature sensor II informs the control unit about the cylinder head temperature. It is responsible for mixture enrichment for cold starting or warming-up.
The DME control unit of the Carrera sets itself to a fixed resistance value permanently stored in the control unit which approximately corresponds to that of an engine at operating temperature. There is no enrichment by the faulty NTC II when the engine is warm (emergency running program). This results in starting problems if the engine is cold (no cold start enrichment).
Short circuit to ground:
When engine is cold: No engine pickup, too lean, engine stops. No effect if engine is at operating temperature.
Replacement value is applicable to both types of fault!