B30 The vehicle does not start
- Make
- Fiat
- Model
- Seicento Factory Service Manual
- Year
- 1998–2010
- Section
- Starting › B30 The vehicle does not start
DiagnosisB30 The vehicle does not start · page 1 of 2
B30 The vehicle does not start
Diagnosis table
The vehicle does not start
When the vehicle is stationary and the engine is running, if the accelerator is pressed the vehicle will not start at all (the clutch does not engage).
First check:
– intactness and correct connection of connectors K94, M85 and M10 (wiring diagrams: E7040 “ELECTRONIC CLUTCH” and E5010 “STARTING AND RECHARGING”).
| Step | Validity | Operation to be performed | Test results | ||
|---|---|---|---|---|---|
| All OK | Problems found | Intervention | |||
| 1 | CHECK THROTTLE POTENTIOMETER WIRING K94 | ||||
| Disconnect connector K94 and turn the key to MAR. Connect a digital multimeter (set to read Volt as follows: – black probe to connector K94 pin 2 – red probe to connector K94 pin 3. ~ 5 Volt should be read. |
Go to Step 2 | No voltage is read. The ECU is not powered. | Perform the next check | ||
| Turn the key to STOP. Disconnect connector K94. Disconnect connector M85. Connect a digital multimeter (set to read Ohm) between connector K94 pin 1 and connector M85 pin 35. ~ 0 Ω should be read. |
Perform the next check | If > 10 Ω is read, the connection between ECU and potentiometer internal resistance is uncertain. | Restore the connection between connector K94 pin 1 and connector M85 pin 35. (wiring diagram: E7040 “ELECTRONIC CLUTCH”) |
||
| Connect a digital multimeter (set to read Ohm) between connector K94 pin 2 and connector M85 pin 5. ~ 0 Ω should be read. |
Perform the next check | > 10 Ω is read, the connection between potentiometer cursor and ECU is uncertain. | Restore the connection between connector K94 pin 2 and connector M85 pin 5. (wiring diagram: E7040 “ELECTRONIC CLUTCH”) | ||
| Connect a digital multimeter (set to read Ohm) between connector K94 pin 3 and connector M85 pin 6. ~ 0 Ω should be read |
Perform the next check | If > 10 Ω is read, the connection between ECU and potentiometer internal resistance is uncertain. | Restore the connection between connector K94 pin 3 and connector M85 pin 6. (wiring diagram: E7040 “ELECTRONIC CLUTCH”) |
||
(Cont..)
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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