5-16
BF135A•BF150A
DTC
PGM-FI MIL
Detected unit
Probable problem part
Ref. page
10-1
MIL comes ON
IAT sensor (Voltage too low)
• Short circuit in IAT sensor wire
• Faulty IAT sensor
• Faulty ECM
10-2
MIL comes ON
IAT sensor (Voltage too high)
• Open circuit in IAT sensor wire
• Faulty IAT sensor
• Faulty ECM
13-1
MIL comes ON
BARO sensor (Voltage too low)
• Short circuit in BARO sensor wire
• Faulty BARO sensor
• Faulty ECM
13-2
MIL comes ON
BARO sensor (Voltage too high)
• Open circuit in BARO sensor wire
• Faulty BARO sensor
• Faulty ECM
14-1
MIL comes ON
IAC valve (Abnormal current flow)
• Open/short circuit in IAC valve wire
• Faulty IAC valve
• Faulty ECM
21-1
MIL comes ON
VTEC solenoid valve
• Open/short circuit in VTEC solenoid valve
(Abnormal output)(BF150A only)
• Faulty VTEC solenoid valve
• Faulty ECM
23-1
MIL comes ON
Knock sensor (Abnormal detection)
• Open/short circuit in knock sensor wire
• Faulty knock sensor
• Faulty ECM
41-3
MIL comes ON
A/F sensor heater
• Open/short circuit in A/F sensor heater wire
(Abnormal current flow)
• Faulty A/F sensor heater
• Faulty ECM
41-4
MIL comes ON
A/F sensor heater
• Open/short circuit in A/F sensor heater wire
(Abnormal current flow)
• Faulty A/F sensor heater
• Faulty ECM
48-5
MIL comes ON
A/F sensor heater
• Open circuit in A/F sensor heater wire
(Abnormal current flow)
• Faulty A/F sensor
• Faulty ECM
48-6
MIL comes ON
A/F sensor heater
• Short circuit in A/F sensor wire C line
(Abnormal current flow)
• Faulty A/F sensor
• Faulty ECM
48-7
MIL comes ON
A/F sensor heater
• Short circuit in A/F sensor wire V line
(Abnormal current flow)
• Faulty A/F sensor
• Faulty ECM