Troubleshooting - Volvo 850 Manual

Troubleshooting

The previous sections have already dealt with instructions for action in the event of a breakdown.
This section contains information which may help you rectify certain problems yourself so that you
can continue your journey.
THE ENGINE DOES NOT START OR
IS DIFFICULT TO START
The instructions for starting the engine have not
been followed: see 3:4.
Start the engine in accordance with the instructions.
The battery is poorly charged or flat
Start the vehicle with an auxiliary battery (see 3:14).
Recharge the battery.
Find out why the battery is poorly charged.
Poor connection in the electrical system
Check all the electrical leads in the ignition system, battery, starter motor.
No fuel reaching the engine
Check if there is fuel in the tank.
Check that none of the hoses/connections in the fuel system are loose or
kinked.
Check that the fuel pump fuse has not blown (fuse no. 2).
Fault in the ignition system
Check the spark plugs (electrode gap should be 0.7 mm); wipe them
clean.
Check that all the electrical leads in the ignition system are
correctly connected and clean.
Blocked air filter/fuel filter
Replace filter.
ELECTRICALLY OPERATED SUN ROOF
CANNOT BE SHUT
No current supply to sun roof motor
The overload circuit breaker (no. 37 in the fuse box) has been
activated. Wait approx. 20 seconds for the circuit breaker to cool
down.
Check fuse no. 35.