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Output duty cycle 30% or more P0032 and P0052 Monitor runs whenever following DTCs not stored None Battery voltage 10.5 V or higher Time after heater on 5 seconds or more Active heater OFF control Not operating Active heater ON control Not operating Air fuel ratio sensor heater duty-cycle More than 0% P101D and P103D Monitor runs whenever following DTCs not stored P0031, P0051 (Air fuel ratio sensor heater) Battery voltage 10.5 V or higher Active heater OFF control Not operating Active heater ON control Not operating TYPICAL MALFUNCTION THRESHOLDS P0031 and P0051 Air fuel ratio sensor heater current Below 0.8 A P0032 and P0052 Air fuel ratio sensor heater output ON Hybrid IC high current limiter monitor Fail P101D and P103D Air fuel ratio sensor heater OFF current Higher than 11 A Hybrid IC high current limiter monitor input Fail COMPONENT OPERATING RANGE A/F sensor heater current 0.8 A or more CONFIRMATION DRIVING PATTERN 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P0032,... |