B30 The vehicle does not start (page 2 of 2)
- Make
- Fiat
- Model
- Seicento Factory Service Manual
- Year
- 1998–2010
- Section
- Starting
DiagnosisB30 The vehicle does not start · page 2 of 2
(Continued The vehicle does not start)
| Step | Validity | Operation to be performed | Test results | ||
|---|---|---|---|---|---|
| All OK | Problems found | Intervention | |||
| 1 continued |
CHECK THROTTLE POTENTIOMETER WIRING K94 Connect a digital multimeter (set to read Ohm) between connector K94 pin 3 and earth. > 1 kΩ should be read. |
Perform the next check | If < 1 kΩ is read, there is a short circuit to earth. | Restore correct connection (wiring diagram: E7040 "ELECTRONIC CLUTCH") | |
| Connect a digital multimeter (set to read Ohm) between connector K94 pin 2 and earth. > 1 kΩ should be read. |
Go to Step 2 | If < 1 kΩ is read, there is a short circuit to earth. | Restore correct connection (wiring diagram: E7040 "ELECTRONIC CLUTCH") | ||
| 2 | CHECK THROTTLE POTENTIOMETER K94 Disconnect connector K94. Turn the key to STOP. Connect a digital multimeter (set to read Ohm) between potentiometer K94 pins 2 and 3. ~ 5 kΩ should be read. |
Perform the next check | A value other than ~ 5 kΩ is read. The potentiometer resistance is damaged or broken. | Replace potentiometer K94 PROCEDURE OP. 1820E64 | |
| Connect a digital multimeter (set to read Ohm) between potentiometer K94 pins 1 and 2. A value between 2 - 5 kΩ should be read. |
Go to Step 3 | Move the potentiometer lever (complete range). If a value other than 2 - 5 kΩ is read, the cursor is damaged. | Replace potentiometer K94 PROCEDURE OP. 1820E64. If the fault persists, check and, if required, replace ECU M85 PROCEDURE OP. 1820E62. |
||
| 3 | CHECK CONNECTION BETWEEN ECU M10 AND ECU M85 Disconnect the Engine ECU connectors M10 and the automatic clutch ECU M85. Connect a digital multimeter (set to read Ohm) between connector M85 pin 23 and connector M10 pin 23. ~ 0 Ω should be read. |
End of test | If > 10 Ω is read, the connection between ECU M10 and ECU M85 is uncertain. | Restore correct connection (wiring diagram: E7040 "ELECTRONIC CLUTCH") Check the engine ECU M10 |
|
Parts & tools for this job For 1998 Fiat Seicento
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLSocket setSearch: socket set metric
- BOOKHaynes manualSearch: Haynes manual Fiat Seicento
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