CONNECTOR DETAIL PINOUT DETAILS COMPONENT SPECIFICATION The lambda sensor is mounted on the closed couple catcon. The lambda sensor has a four pin connector with a special ceramic body and gas permeable platinum electrodes on the surface. When the ceramic body is exposed to temperature 350 °C, oxygen in the air diffuses into ceramic body. Depending on the porosity electrodes which are exposed to gas having varied level of oxygen. The lambda sensor provides air/fuel ratio signal in mili volts to ECU as a function of varying air/fuel ratio. At 350 °C, Lambda = 0.97 - 800 mV ± 55 mV(Rich mixture) Lambda = 1.1 - 50 mV ± 30 mV (Lean mixture) SENSOR STANDALONE DIAGNOSIS Use TATA diagnosis tool to check for : Signal voltage - > than 0.5V or < than 0.4V Switching frequency - > than 0.2 Hz Use multimeter to check the heater function by measuring the heater resistance. Heater resistance at room temperature - 90 ohms Supply voltage - 12V DC Check the signal voltage (Between pin number 2 and 3) Signal Voltage - 0.68 ± 0.25V DC- at idle position Signal Voltage - 04.25 ± 0.45V DC - at WOT position DPF TEMPERATURE SENSOR XVIII. SENSOR LOCATION CONNECTOR DETAIL a) On DPF PIN DESCRIPTION 1 Heater (+) 2 Heater (-) 3 Inner Pumping Electrode (-) 4 Air Electrode (+) PIN DESCRIPTION 1 (+) Signal, Grey 2 (-) Ground, White Diesel Engine Ph-2 (CAFÉ) 213
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