1G-4 Fuel System:
Diagnostic Information and Procedures
Fuel System Diagnosis
B933H21704001
Condition
Possible cause
Correction / Reference Item
Engine will not start or is
hard to start (No fuel
reaching the intake
manifold)
Clogged fuel filter or fuel hose.
Clean or replace.
Defective fuel pump.
Replace.
Defective fuel valve.
Replace.
Defective fuel injector.
Replace.
Defective ECM.
Replace.
Open-circuited wiring connections.
Check and repair.
Engine will not start or is
hard to start (Incorrect
fuel/air mixture)
TP sensor out of adjustment.
Adjust
Defective fuel pump.
Replace.
Defective fuel valve.
Replace.
Defective TP sensor.
Replace.
Defective CKP sensor.
Replace.
Defective IAP sensor.
Replace.
Defective ECM.
Replace.
Defective ECT sensor.
Replace.
Defective IAT sensor.
Replace.
Engine stalls often
(Incorrect fuel/air mixture)
Defective IAP sensor or circuit.
Repair or replace.
Clogged fuel filter.
Clean or replace.
Defective fuel pump.
Replace.
Defective fuel valve.
Replace.
Defective ECT sensor.
Replace.
Defective thermostat.
Replace.
Defective IAT sensor.
Replace.
Damaged or cracked vacuum hose.
Replace.
Engine stalls often (Fuel
injector improperly
operating)
Defective fuel injector.
Replace.
No injection signal from ECM.
Repair or replace.
Open or short circuited wiring
connection.
Repair or replace.
Defective battery or low battery voltage.
Replace or recharge.
Engine runs poorly in
high speed range
(Defective control circuit
or sensor)
Low fuel pressure.
Repair or replace.
Defective TP sensor.
Replace.
Defective IAT sensor.
Replace.
Defective CKP sensor.
Replace.
Defective GP switch.
Replace.
Defective IAP sensor.
Replace.
Defective ECM.
Replace.
TP sensor out of adjustment.
Adjust or replace.
Engine lacks power
(Defective control circuit
or sensor)
Low fuel pressure.
Repair or replace.
Defective TP sensor.
Replace.
Defective IAT sensor.
Replace.
Defective CKP sensor.
Replace.
Defective GP switch.
Replace.
Defective IAP sensor.
Replace.
Defective ECM.
Replace.
TP sensor out of adjustment
Adjust.
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Summary of Contents for LT-Z400
Page 2: ...P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 4: ...P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 62: ...0C 9 Service Data P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 296: ...1K 6 Exhaust System P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 358: ...3A 18 Drive Chain Drive Train Drive Shaft P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 408: ...4D 5 Parking Brake P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 460: ...6B 13 Steering Handlebar P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 490: ...P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
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