12 · Diagnostics

X20 Brake fluid leakages

DiagnosisX20 Brake fluid leakages · page 1 of 2

Visually check for brake fluid leakages.

If the fault is associated to reduced braking effect, see table F01

Step	Validity	Operation to be performed	Test results
Step	Validity	Operation to be performed	OK	⚠	🔧
1	CHECK BRAKE FLUID LEVEL	Visually check fluid level in reservoir	All OK Go to Step 2	Problems found Insufficient level	Intervention Restore correct level and run a road test. If the fault persists, go to Step 2
2	CHECK RESERVOIR LEAKAGES	Visually check for leakages in the reservoir	All OK Go to Step 3	Problems found Leakages from reservoir	Intervention Replace reservoir PROCEDURE OP. 3330C30
3	CHECK PUMP LEAKAGES	Visually check the brake fluid pump and fittings for leakages	All OK Go to Step 4	Problems found Leakages from fittings in the pump/ABS ECU area	Intervention Tighten fittings or replace damaged parts PROCEDURE 3340B
3	CHECK PUMP LEAKAGES		All OK Go to Step 4	Problems found Leakages from the pump	Intervention Replace pump PROCEDURE OP. 3330C14 (ABS); if required, replace brake booster unit PROCEDURE OP. 3330D10
4	CHECK HOSES	Visually check for leakages from the hoses	All OK Go to Step 5	Problems found Leakages from fittings or deteriorated hoses	Intervention Tighten fittings or replace hoses PROCEDURE OP. 3330E10; 3340B10 (ABS) and PROCEDURE OP. 3330E42; 3340B34 (ABS)
5	CHECK PIPES	Visually check pipes under the body for leakages	All OK Go to Step 6	Problems found leakages from fittings or deteriorated pipes	Intervention Tighten fittings or replace pipes PROCEDURE 3330E; 3340B (ABS)

(Cont..)

Parts & tools for this job For 1998 Fiat Seicento

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