Mil Troubleshooting - TOHATSU BFT75A Service Manual

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MIL TROUBLESHOOTING

MIL INDEX
MIL
No. of blinks Condition
MIL does not Detected
blink component
Stays ON
1 Blink
3 Blink
4 Blink
6 Blink
7 Blink
8 Blink
10 Blink
14 Blink
Detected component
ECM
ON ECM
HO2S
MAP sensor
(voltage too low or too high)
CKP sensor
(no pulse or abnormal pulse)
EBT sensor
(voltage too low or too high)
TP sensor
(voltage too low or too high)
CMP sensor
(no pulse or abnormal pulse)
IAT sensor
(voltage too low or too high)
IAC valve
(control failure)
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
Normal with the SCS service connector
installed - If engine condition continues
without the MIL blinking, check the
following:
• Short circuit in DLC wire
• Short circuit in MIL wire
• Short circuit in sensor power circuit
• 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
• Open or short 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
• Faulty crank purser plate
• Loose or poor contact of the
connector
• Open or short 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 or short circuit in CMP sensor
wire
• Faulty CMP sensor
• Faulty cam pulser plate
• Loose or poor contact of the
connector
• Open and short circuit in IAT sensor
wire
• Faulty IAT sensor
• Loose or poor contact of the
connector
• Open and short circuit in IAC valve
wire
• Faulty IAC valve
FUEL SYSTEM
Ref.
page
4-18
5-45
5-48
5-49
5-51
5-53
5-54
5-56
5-58
5-59
5-43