Diagnostic Information And Procedures; Fuel System Diagnosis - Suzuki RMX450Z Service Manual

Fuel System Diagnosis

Condition
Engine will not start or is
hard to start (No fuel
reaching the intake
manifold)
Engine will not start or is
hard to start (Incorrect
fuel/air mixture)
Engine stalls often
(Incorrect fuel/air mixture)
Engine stalls often (Fuel
injector improperly
operating)
Engine runs poorly in
high speed range
(Defective control circuit
or sensor)
Engine lacks power
(Defective control circuit
or sensor)

Diagnostic Information and Procedures

Possible cause
Clogged fuel filter or fuel hose.
Defective fuel pump.
Defective fuel injector.
Defective ECM.
Open-circuited wiring connections.
TP sensor out of adjustment.
Defective fuel pump.
Defective TP sensor.
Defective CKP sensor.
Defective IAP sensor.
Defective ECM.
Defective ECT sensor.
Defective IAT sensor.
Defective IAP sensor or circuit.
Defective fuel pump.
Defective ECT sensor.
Defective IAT sensor.
Defective fuel injector.
No injection signal from ECM.
Open or short circuited wiring
connection.
Defective battery or low battery voltage. Replace or recharge.
Low fuel pressure.
Defective TP sensor.
Defective IAT sensor.
Defective CKP sensor.
Defective GP switch.
Defective IAP sensor.
Defective ECM.
TP sensor out of adjustment.
Low fuel pressure.
Defective TP sensor.
Defective IAT sensor.
Defective CKP sensor.
Defective GP switch.
Defective IAP sensor.
Defective ECM.
TP sensor out of adjustment.
Correction / Reference Item
Clean or replace.
Replace.
Replace.
Replace.
Check and repair.
Adjust.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Repair or replace.
Replace.
Replace.
Replace.
Replace.
Repair or replace.
Repair or replace.
Repair or replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Adjust or replace.
Repair or replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Adjust.
Fuel System: 1G-2
BA02J21704001