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Monitor runs whenever following DTCs not stored None Battery voltage 10.5 V or more Time after heater ON 5 seconds or more Active heater OFF control Not operating Active heater ON control Not operating Heater output duty More than 0% P101D and P103D Monitor runs whenever following DTCs not stored None Battery voltage 10.5 V or more Heater output duty cycle Less than 60% Active heater OFF control Not operating Active heater ON control Not operating Air fuel ratio sensor heater range check low current failure (P0031, P0051) Not detected TYPICAL MALFUNCTION THRESHOLDS P0031 and P0051 A/F sensor heater current Less than 0.8 A P0032 and P0052 Command to heater output ON Heater current detected by heater monitor IC 14 A or more P101D and P103D Heater OFF current More than 11 A Heater current detected by heater monitor IC 14 A or more COMPONENT OPERATING RANGE A/F sensor heater current 0.9 to 9.9 A CONFIRMATION DRIVING PATTERN 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P003... |