Suzuki AN650 2002 Service Manual page 409

Complaint
Engine stalls often Incorrect fuel/air mixture
Fuel injector improperly operating
Control circuit or sensor improperly operating
Engine parts improperly operating
Symptom and possible causes
1. Defective intake air pressure sensor or circuit.
2. Clogged fuel filter.
3. Defective fuel pump.
4. Defective fuel pressure regulator.
5. Damaged or cracked vacuum hose.
6. Defective engine coolant temp. sensor.
7. Defective thermostat.
8. Defective intake air temp. sensor.
1. Defective fuel injector.
2. No injection signal from ECM.
3. Open or short circuited wiring connection.
4. Defective battery or low battery voltage.
1. Defective ECM.
2. Defective fuel pressure regulator.
3. Defective throttle position sensor.
4. Defective intake air temp. sensor.
5. Defective camshaft position sensor.
6. Defective crankshaft position sensor.
7. Defective engine coolant temp. sensor.
8. Defective fuel pump relay.
1. Fouled spark plugs.
2. Defective crankshaft position sensor or ECM.
3. Clogged fuel hose.
4. Tappet clearance out of adjustment.
SERVICING INFORMATION
Remedy
Repair or replace.
Clean or replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Repair or replace.
Repair or replace.
Replace or recharge.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Clean.
Replace.
Clean.
Adjust.
11-5