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Description NHEC0833 SYSTEM DESCRIPTION NHEC0833S01 Sensor Input Signal to ECM ECM func- tion Actuator Crankshaft position sensor (POS) Engine speed Heated Heated oxygen sensor 2 heater Engine coolant temperature sensor Engine coolant temperature Main air flow sensor Amount of intake air The ECM performs ON/OFF control of the heated oxygen sensor 2 heaters corresponding to the engine speed, OPERATION NHEC0833S02 Engine speed rpm Heated oxygen sensor 2 heater Above 3,600 OFF Below 3,600 (After the following conditions are met.) I After warming up I After keeping the engine speed between 3,500 and 4,000 ON CONSULT-II Reference Value in Data Monitor NHEC0834 Specification data are reference values. MONITOR ITEM CONDITION SPECIFICATION HO2S2 HTR (B1) I Engine is running above 3,600 rpm. OFF I Engine is running below 3,600 rpm after the following conditions are I After warming up I After keeping the engine speed between 3,500 and 4,000 rpm for 1 ON On Board Diagnosis Logic NHEC0836 DTC No. Trouble diagnosis name DTC Detecting Condition Possible Cause P0037 Heated oxygen sen- The current amperage in the heated oxygen sen- I Harness or connectors I Heated oxygen sensor 2 heater P0038 Heated oxygen sen- The current amperage in the heated oxygen sen- I Harness or connectors I Heated oxygen sensor 2 heater GI MA EM LC FE AT AX SU BR ST RS BT HA SC EL IDX DTC P0037, P0038, P0057, P0058 HO2S2 HEATER Description EC-181 |