|
|
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–215 ES MONITOR DESCRIPTION The ECM uses sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to HINT: Bank 1 refers to the bank that includes cylinder No. 1. • Bank 2 refers to the bank that does not include cylinder No. 1. • Sensor 1 refers to the sensor closest to the engine assembly. • Sensor 2 refers to the sensor farthest away from the engine assembly. MONITOR STRATEGY DTC P0420 Catalyst System Efficiency Below Threshold DTC P0430 Catalyst System Efficiency Below Threshold DTC No. DTC Detection Conditions Trouble Areas P0420 OSC value smaller than standard value under active air-fuel • Gas leakage from exhaust system • A/F sensor (bank 1 sensor 1) • HO2 sensor (bank 1 sensor 2) • Exhaust manifold (TWC) P0430 OSC value smaller than standard value under active air-fuel • Gas leakage from exhaust system • A/F sensor (bank 2 sensor 1) • HO2 sensor (bank 2 sensor 2) • Exhaust manifold (TWC) Related DTCs P0420: Catalyst Deterioration Required Sensors/Components (Main) A/F sensor and heated oxygen sensor Required Sensors/Components (Related) Intake air temperature sensor, mass air flow meter, crankshaft position sensor and Frequency of Operation Once per driving cycle Duration About 30 seconds MIL Operation 2 driving cycles Sequence of Operation None |