Porsche 944 - Manual (Page 146)

24/28
Fuel System - Electronic Control 944 S/944 S2
Fault, Fault Code Possible Causes, Elimination, Remarks
Test Point 4
Engine tamp. sensor
(NTC II/ )
Fault Code 1_14
Engine temperature can be read direct from the "actual value"
menu with a 9288 System Tester.
No Plausible Display:
Connect ohmmeter on terminal 45 and terminal 24 of the
disconnected DME control unit plug with help af test leads.
Display at: 0°C =
15 - 30°C =
40°C =
80°C =
100°C =
4.4 - 6.8 k
1.4 - 3.6 k
1.0 - 1.3 k
250 - 390
160 - 210
Test direct on the engine temperature sensor, if the values are
not reached.
Note: Temperature sensor II sends information about the engine
temperature to the control unit. It is used to provide a rich fuer/air
mix-ture after a cold start or during warm-up.
Break ( ):
DME control unit of the 944 S selects a resistance value, which
is stored in the control unit's memory and is approximately equal
to that of an engine at operating temperature. There is no
enrichment from a faulty NTC II when the engine is warm
(emergency running program). This results in starting problems
when the engine is cold (no cold start enrichment).
Short (0 ):
No engine pickup, too lean and stopping of engine in cold state.
No effects in operating temperature state.
Replacement value is applicable to both types of fault!
D 24/28 - 12 DME - Diagnosing/Troubleshooting
Printed In Germany - XXI, 1989