Dtc P2146 - Mazda 6 Workshop Manual

DTC P2146

DTC P2146 Fuel injector No.1/No.4 circuit malfunction
• The PCM monitors each cylinder injection confirmation signal from the IDM while the engine is running. If
the PCM does not receive the injection confirmation signal for No.1 and No.4 cylinder normally, the PCM
determines that the fuel injector No.1 and No.4 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 1D and fuel injector No.1 terminal D
• Short to power supply in wiring harness between IDM terminal 1D and fuel injector No.1 terminal D
POSSIBLE
• Open circuit in wiring harness between IDM terminal 1D and fuel injector No.1 terminal D
CAUSE
• Short to GND in wiring harness between fuel injector No.4 terminal D and IDM terminal 1D
• Short to power supply in wiring harness between fuel injector No.4 terminal D and IDM terminal 1D
• Open circuit in wiring harness between fuel injector No.4 terminal D and IDM terminal 1D
• PCM malfunction
ON-BOARD DIAGNOSTIC
B6E407002100107
F2
F2–191