Volvo 1992 240 Manuale Utente

Pagina di 160
1992 Volvo 240
pg. 104 Service diagnosis 
The diagnoses outlined below are intended to serve only as a guide to locate and temporarily correct 
minor faults. Causes of unsatisfactory performance should be investigated and corrected by your Volvo 
dealer. 
Condition: Starter fails to operate (or operates very slowly) 
 
Possible cause 
Correction 
Weak battery or dead cell. 
With the starting (ignition) switch in the "Driving" or 
"On" position, check to see if the warning lights on 
the dashboard come on and if they stay on when the 
starter is engaged.  
If the lights do not come on or if they go off when the 
starter is engaged, the battery is discharged or see 
below. 
Loose or corroded battery cable terminals. 
Check battery terminals and clamps. Clean or replace 
if necessary. Check that the starter cable is secure at 
its terminals.  
The ground strap, which connects the battery negative 
(–) terminal to the engine, should also be checked for 
corrosion or looseness. 
Open circuit between starting (ignition) switch 
and starting (ignition) switch terminal on 
starter. 
The circuit is closed if a clicking sound is heard from 
the starter when it is engaged. If no clicking sound is 
heard, check that the blue wire at the starter is secure. 
If still no clicking sound is heard, the starting 
(ignition) switch or the wire is defective. 
Starter motor defective. 
If the above checks have been performed, and no 
fault is evident, the starter may be defective.  
NOTE: In this case the headlight intensity will not 
dim when the starter is engaged. 
pg. 105 Service diagnosis (cont.) 
Condition: Starter motor operates but engine does not start 
 
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