Dtc Troubleshooting - TOHATSU BFT250A Service Manual

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DTC TROUBLESHOOTING

DTC INDEX
DTC
MIL does not
come ON/blink
0 or does not
communicate
MIL stay ON
0 or does not
communicate
0-2
1-4
3-1
3-2
4-1
4-2
6-1
6-2
7-1
7-2
MIL Detected component
ECM
ECM
ON Internal failure of ECM
ON HO2S
ON MAP sensor (voltage too low)
ON MAP sensor (voltage too high)
ON CKP sensor (no pulse)
ON CKP sensor (abnormal pulse)
ON ECT sensor 1 (EBT sensor)
(voltage too low)
ON ECT sensor 1 (EBT sensor)
(voltage too high)
ON TP sensor (voltage too low)
ON TP sensor (voltage too high)
Probable cause
• Loose or poor contact of the
connector
• Faulty indicator light
• Open circuit in MIL wire
• Open circuit in ECM power/
ground cable
• Faulty ECM
• SCS service connector
activated
• Short circuit in DLC wire
• Short circuit in MIL wire
• Short circuit in sensor power
circuit
• Faulty ECM
• Faulty ECM
• Loose or poor contact of the
connector
• Open or short circuit in HO2S
wire
• Faulty fuel supply system
• Faulty HO2S
• Loose or poor contact of the
connector
• Short circuit in MAP sensor wire
• Faulty MAP sensor
• Loose or poor contact of the
connector
• Open circuit in MAP sensor wire
• Faulty MAP sensor
• Loose or poor contact of the
connector
• Open or short circuit in CKP
sensor wire
• Faulty CKP sensor
• Loose or poor contact of the
connector
• Faulty CKP sensor
• Faulty Guide plate
• Loose or poor contact of the
connector
• Short circuit in EBT sensor wire
• Faulty EBT sensor
• Loose or poor contact of the
connector
• Open circuit in EBT sensor wire
• Faulty EBT sensor
• Loose or poor contact of the
connector
• Open and short circuit in TP
sensor wire
• Faulty TP sensor
• Loose or poor contact of the
connector
• Open circuit in TP sensor wire
• Faulty TP sensor
FUEL SYSTEM
Ref.
page
4-17
5-18
5-20
5-21
5-22
5-23
5-24
5-25
5-26
5-27
5-28
5-29
5-15