Checking glow plugs
- Make
- Fiat
- Model
- Bravo /Brava (182) Factory Service Manual
- Year
- 1995–2001
- Section
- Preheating control system › Checking glow plugs
CHECKING GLOW PLUGS
If there are difficulties in starting, make sure that all the plugs are working properly. The electrical continuity of each plug should be checked using a digital ohmmeter (Ohm=0.6 at 20°C). It is advisable to carry out this check with the plugs fitted to the cylinder head, as the faulty plug may not appear to be faulty if checked when dismantled from its seating, without the deforming effect caused by the pressure of assembly. Also check that the engine stop solenoid on the fuel injection pump is not short-circuited, broken or disconnected.
NOTE Remember that difficulties in starting may be due to an engine with excessively worn seals, a faulty starter motor or a discharged or badly connected battery.
MAIN OPERATING FAULTS IN THE PREHEATING SYSTEM
| Fault | Cause | Remedy |
|---|---|---|
| Wait-to-start warning light does not come on | Warning light bulb blown Connecting cable between warning light and pin 5 of the control unit broken |
Replace bulb Clean corroded cable ends or replace cable |
| The engine has difficulty in starting | Faulty control unit giving insufficient preheating times | Replace control unit |
| The engine does not start | Electronic control unit not earthed | Check that pin 1 of the control unit is earthed |
| One or several plugs faulty Circuit between ignition switch and tag terminal 3 (+15) of control unit broken |
Replace faulty plugs | |
| Circuit between ignition switch and engine stop solenoid on pump broken | Restore the connection | |
| Ignition switch faulty | Replace ignition switch |
Parts & tools for this job For 1995 Fiat Bravo
- PARTGlow plugsSearch: Fiat Bravo 1995 glow plugs
- TOOLGlow plug socketSearch: glow plug socket
- TOOLDiesel compression testerSearch: diesel compression tester
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