F0: DATA LIST
| No. | Tech 1 Display | Conditions for checking | Nominal value | Trouble Codes | Terminal |
|---|---|---|---|---|---|
| 44 | INJECTION PULSE | Engine running at idle speed, operating temperature | |||
| Switch off all consumers | 1.5 to 2.6 ms | 25, 26, 27, 28 81, 82, 83, 84 | 16, 17, 34, 35, 37 |
This test step serves as a learning and checking value for better comprehension of the system and to evaluate the system with external influences.
The injection period is composed of several elements which have an effect on the size of the signal.
If the measurements of the following test steps deviate from the nominal values, carry out trouble - shooting.
Test Step No. Check of
01 BATTERY VOLTAGE
02 TPS SIGNAL
05 INTAKE AIR TEMP.
06 COOLANT TEMP.
07 MASS AIR FLOW S.
19 FUEL PUMP RELAY
28 ENGINE SPEED
36 02 SENSOR
39 02 INTEGRATOR
40 02 BLM IDLE THR.
Further additional causes of fault are
· Lead interruptions
- fuel injection unit relay K68 / Ter. 8 (+) to injectors
- Motronic control unit K61 / Ter. 16, Ter. 17, Ter. 34, Ter. 35 to injectors
· Pressure regulator defective
· Injectors stick
· Electromagnetic interference caused by
- ignition leads (reroute further away from wiring harness)
- alternator (worn carbon brushes produce sparks)
· Motronic control unit K61 defective