Hydraulic test (page 2 of 2)
- Make
- Fiat
- Model
- Bravo /Brava (182) Factory Service Manual
- Year
- 1995–2001
- Section
- Description and operation (Automatic)
21 Gearbox and differentialHydraulic test · page 2 of 2
P4A34AB01
- chock the vehicle by placing wedges under the wheels;
- apply the handbrake fully;
- press the brake pedal down hard with the left foot;
- start the engine, warm it up to temperature and check that the idle speed is correct;
- move the selector lever to position D;
- read the measurement of the line pressure during idling;
- fully press the accelerator pedal with the right foot and quickly read the line pressure at the engine's stall speed.
The stall speed test must not exceed 5 seconds in duration.
Repeat the last two operations with the selector lever on position R.
| Speed | Position D (and 1-2-3) | Position R (and N-P) |
|---|---|---|
| Idling | 3.7 - 4.3 bar 3.8 - 4.4 kg/cm² | 5.4 - 6.3 bar 5.5 - 6.4 kg/cm² |
| Stall | 10.8 - 12.5 bar 11.0 - 12.8 kg/cm² | 14.1 - 16.9 bar 14.4 - 17.2 kg/cm² |
| Line pressure | Possible causes |
|---|---|
| Higher than specified value in both D and R | Fault in pressure control solenoid Regulating valves faulty |
| Less than specified value in both D and R | Fault in pressure control solenoid Regulating valves faulty Oil pump faulty |
| Less than specified value only in D | Leaks in hydraulic circuit in forward gears |
| Less than specified value only in R | Leaks in hydraulic circuit in reverse and neutral |
Parts & tools for this job For 1995 Fiat Bravo
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLSocket setSearch: socket set metric
- BOOKHaynes manualSearch: Haynes manual Fiat Bravo
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