Dtc P2149 - Mazda 6 Workshop Manual

DTC P2149

DTC P2149 Fuel injector No.2/No.3 circuit malfunction
• The PCM monitors each cylinder's injection confirmation signal from the IDM while the engine is running. If
the PCM does not receive the injection confirmation signal for No.2 and No.3 cylinder normally, the PCM
determines that the fuel injector No.2 and No.3 operation is not verified.
DETECTION
Diagnostic support note
CONDITION
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
• IDM malfunction
• Connector or terminal malfunction
• Short to GND in wiring harness between IDM terminal 1C and fuel injector No.2 terminal D
• Short to power supply in wiring harness between IDM terminal 1C and fuel injector No.2 terminal D
• Open circuit in wiring harness between IDM terminal 1C and fuel injector No.2 terminal D
POSSIBLE
• Fuel injector No.3 malfunction
CAUSE
• Short to GND in wiring harness between fuel injector No.3 terminal D and IDM terminal 1C
• Short to power supply in wiring harness between fuel injector No.3 terminal D and IDM terminal 1C
• Open circuit in wiring harness between fuel injector No.3 terminal D and IDM terminal 1C
• PCM malfunction
F2–194
ON-BOARD DIAGNOSTIC
B6E407002100108