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Description NHEC0123 SYSTEM DESCRIPTION NHEC0123S01 Sensor Input Signal to ECM ECM func- tion Actuator Crankshaft position sensor (POS) Engine speed Heated oxy- Heated oxygen sensor 1 heaters Crankshaft position sensor (REF) The ECM performs ON/OFF control of the heated oxygen sensor 1 heaters (front) corresponding to the engine OPERATION NHEC0123S02 Engine speed rpm Heated oxygen sensor 1 heaters (front) Above 3,600 OFF Below 3,600 ON CONSULT-II Reference Value in Data Monitor NHEC0124 Specification data are reference values. MONITOR ITEM CONDITION SPECIFICATION HO2S1 HTR (B1) I Engine speed: Below 3,600 rpm ON I Engine speed: Above 3,600 rpm OFF On Board Diagnosis Logic NHEC0126 Malfunction is detected when the current amperage in the heated Possible Cause NHEC0437 I Harness or connectors I Heated oxygen sensor 1 heater (front) GI MA EM LC FE AT AX SU BR ST RS BT HA SC EL IDX DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1 HEATER (FRONT) Description EC-239 |