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Home >> Infiniti >> 2017 >> QX80 Base, RWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> DTC/Circuit Diagnosis >> DTC P1556, P1557: Battery Temperature Sensor >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

NOTE:

If DTC P1556 or P1557 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to  DTC LOGIC  . 

DTC No. Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition Possible cause
P1556 BAT TMP SEN/CIRC
(Battery temperature sensor circuit low input)
Signal voltage from Battery temperature sensor remains 0.16V or less for 5 seconds or more.
  • Harness or connectors

    [Battery current sensor (Battery temperature sensor) circuit is shorted.]

  • Battery current sensor (Battery temperature sensor)
P1557 BAT TMP SEN/CIRC
(Battery temperature sensor circuit high input)
Signal voltage from Battery temperature sensor remains 4.84V or more for 5 seconds or more.