TOHATSU BFT115A Service Manual page 135

DTC MIL
41-3 ON
41-4 ON
48-5 ON
48-6 ON
48-7 ON
140-1 ON
140-2 ON
141-1 ON
Detected component
A/F sensor heater
(abnormal high current or low
current)
A/F sensor heater
(abnormal current)
A/F sensor
(open circuit in A/F sensor wire
(AFV/AFC))
A/F sensor
(short circuit in A/F sensor wire
(AFV))
A/F sensor
(short circuit in A/F sensor wire
(AFC))
ECT sensor 2 (voltage too low)
ECT sensor 2 (voltage too
high)
ECT sensor 3 (voltage too low)
Probable cause
• Loose or poor contact of the connec-
tor
• Open or short circuit in A/F sensor
heater wire (LAFR)
• Open circuit in A/F sensor heater
wire (AFHT+)
• Open or short circuit in A/F sensor
heater wire (AFHT)
• Faulty A/F sensor heater
• Faulty A/F sensor heater relay
• Loose or poor contact of the connec-
tor
• Short circuit in A/F sensor heater
wire (AFHT) and A/F sensor wire
(AFC)
• Short circuit in A/F sensor heater
wire (AFHT) and A/F sensor wire
(AFV)
• Short circuit in A/F sensor heater
wire (AFHT+) and A/F sensor wire
(AFC)
• Short circuit in A/F sensor heater
wire (AFHT+) and A/F sensor wire
(AFV)
• Open or short circuit in A/F sensor
heater wire (LAFR)
• Open circuit in A/F sensor heater
wire (AFHT+)
• Open or short circuit in A/F sensor
heater wire (AFHT)
• Faulty A/F sensor heater
• Faulty A/F sensor heater relay
• Loose or poor contact of the connec-
tor
• Open circuit in A/F sensor wire (AFV)
• Open circuit in A/F sensor wire (AFC)
• Loose or poor contact of the connec-
tor
• Short circuit in A/F sensor wire (AFV)
• Loose or poor contact of the connec-
tor
• Short circuit in A/F sensor wire (AFC)
• Loose or poor contact of the connec-
tor
• Short circuit in ECT sensor 2 wire
(TOH1)
• Faulty ECT sensor 2
• Loose or poor contact of the connec-
tor
• Open circuit in ECT sensor 2 wire
(TOH1)
• Open circuit in ECT sensor 2 wire
(SG2)
• Faulty ECT sensor 2
• Loose or poor contact of the connec-
tor
• Short circuit in ECT sensor 3 wire
(TOH2)
• Faulty ECT sensor 3
FUEL SYSTEM
Ref.
page
5-40
5-42
5-44
5-45
5-46
5-47
5-48
5-49
5-17