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Engine Management – V6 – Diagnostics Page 6C1-2–214
3 Are DTCs relating to the reference circuit of the HO2S — Go to the appropriate DTC Table in this Section Go to Step 4 4 1 Disconnect the appropriate HO2S wiring 2 Ignition ON, engine OFF. 3 Using a digital multimeter, measure the voltage Is the voltage more than the specified value? 50 mV Go to Step 8 Go to Step 5 5 1 Ignition ON, engine OFF. 2 Using a digital multimeter, measure the voltage is the voltage display more than the specified value? 50 mV Go to Step 8 Go to Step 6 6 1 Connect a 3 A fused jumper wire between the 2 Ignition ON, engine OFF. 3 Using a digital multimeter, measure the voltage Is the voltage reading within the specified range? 4.8 – 5.2 V Go to Step 7 Go to Step 8 7 1 Connect a 3 A fused jumper wire between the 2 Ignition ON, engine OFF. 3 Using a digital multimeter, measure the voltage Is the voltage reading within the specified range? 4.8 – 5.2 V Go to Step 9 Go to Step 10 8 1 Test the input pump current and the pump Was any fault found and rectified? — Go to Step 12 Go to Step 11 9 1 Test or inspect for the following conditions that • Lean or rich fuel injector fuel delivery, • Contaminated fuel, • Low fuel line pressure, • Exhaust leak near the HO2S, and • Leak in the crankcase or vacuum line. Was any fault found and rectified? — Go to Step 12 Go to Step 10 |