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EC-234 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P0138, P0158 HO2S2 Component Function Check INFOID:0000000009178159 1. PERFORM COMPONENT FUNCTION CHECK-1 Without CONSULT 1. Start engine and warm it up to the normal operating temperature. 2. Turn ignition switch OFF and wait at least 10 seconds. 3. Turn ignition switch ON. 4. Turn ignition switch OFF and wait at least 10 seconds. 5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load. 6. Let engine idle for 1 minute. 7. Check the voltage between ECM harness connector terminals under the following conditions. Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 2. 2. PERFORM COMPONENT FUNCTION CHECK-2 Check the voltage between ECM harness connector terminals under the following conditions. Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 3. 3. PERFORM COMPONENT FUNCTION CHECK-3 Check the voltage between ECM harness connector terminals under the following conditions. Is the inspection result normal? YES >> INSPECTION END NO >> Proceed to . Diagnosis Procedure INFOID:0000000009178160 1. INSPECTION START Confirm the detected malfunction (A or B). Refer to . Which malfunction is detected? A >> GO TO 2. B >> GO TO 6. DTC ECM Condition Voltage Connector + – Terminal P0138 F52 57 59 Revving up to 4,000 rpm under no load The voltage should be below 0.18 V at P0158 58 DTC ECM Condition Voltage Connector + – Terminal P0138 F52 57 59 Keeping engine speed at idle for 10 The voltage should be below 0.18 V P0158 58 DTC ECM Condition Voltage Connector + – Terminal P0138 F52 57 59 Coasting from 80 km/h (50 MPH) with se- The voltage should be below 0.18 V at P0158 58 |