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On Board Diagnosis Logic NBEC0282 ★ The closed loop control has the one trip detection logic. Malfunction is detected when the closed loop control function for Possible Cause NBEC0531 I The front heated oxygen sensor circuit is open or shorted. I Heated oxygen sensor 1 (front) I Heated oxygen sensor 1 heater (front) DTC Confirmation Procedure NBEC0283 CAUTION: Always drive vehicle at a safe speed. I Never raise engine speed above 3,600 rpm during the I Before performing the following procedure, confirm that SEF063Y WITH CONSULT-II NBEC0283S01 1) Start engine and warm it up to normal operating temperature. 2) Select “DATA MONITOR” mode with CONSULT-II. 3) Hold engine speed at 2,000 rpm and check one of the follow- I “HO2S1 (B1)/(B2)” voltage should go above 0.70V at least I “HO2S1 (B1)/(B2)” voltage should go below 0.21V at least GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX DTC P1148 (RIGHT BANK, -B1), P1168 (LEFT BANK, -B2) CLOSED LOOP CONTROL On Board Diagnosis Logic EC-491 |