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DIESEL CONTROL SYSTEM FLA -483 SIGNAL CIRCUIT INSPECTION E22D42B3 1. Check voltage in sensor signal circuit 1) IG KEY "OFF", ENGINE "OFF". 2) Disconnect Lambda sensor connector. 3) IG KEY "ON". 4) Measure the voltage of Lambda sensor connector terminal 4. Specification : 0.8V~0.9 V 5) Is the measured voltage within the specification? YES ▶ Go to "3. Check sensor pump circuit". NO ▶ No voltage detected in Lambda sensor signal circuit : Go to "2. Check open in sensor signal circuit" as follows. 2. Check open in Lambda sensor signal circuit 1) IG KEY "OFF", ENGINE "OFF". 2) Disconnect Lambda sensor connector and ECM connector. 3) Check continuity between Lambda sensor connector terminal 4 and ECM connector terminal 87. Specification : Continuity (below 1.0Ω ) 4) Is the measured resistance within the specification? YES ▶ Repair short to ground in Lambda sensor signal circuit and go to "Verification of Vehicle Repair". NO ▶ Repair open in Lambda sensor signal circuit and go to "Verification of Vehicle Repair". 3. Check voltage in sensor pump circuit 1) IG KEY "OFF", ENGINE "OFF". 2) Disconnect Lambda sensor connector. 3) IG KEY "ON". 4) Measure the voltage of Lambda sensor connector terminal 6. Specification : 0.8V~0.9 V 5) Is the measured voltage within the specification? |