Nissan Versa Sedan Service ManualEngine » Engine control system (EC) » P0127 IAT sensor
DTC Logic
DTC Logic
DTC DETECTION LOGIC
| DTC No. | Trouble diagnosis name (Trouble diagnosis content) | DTC detecting condition | Possible cause |
| P0127 | IAT SENSORB1 (Intake air temperature too high) | Rationally incorrect voltage from the sensor is sent to ECM, compared with the voltage signal from engine coolant temperature sensor. |
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DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Wait until engine coolant temperature is less than 96C (205F)
- Turn ignition switch ON.
- Select "DATA MONITOR" mode of "ENGINE" using CONSULT.
- Check the engine coolant temperature.
- If the engine coolant temperature is not less than 96C (205F), turn ignition switch OFF and cool down engine.
NOTE: Perform the following steps before engine coolant temperature is above 96C (205F).
- Turn ignition switch ON.
- Select "DATA MONITOR" mode of "ENGINE" using CONSULT
- Start engine.
- Hold vehicle speed at more than 70 km/h (43 MPH) for 100 consecutive
seconds.
CAUTION: Always drive vehicle at a safe speed.
- Check 1st trip DTC.
With GST
Follow the procedure "With CONSULT" above.
Is 1st trip DTC detected?
YES >> Proceed to EC, "Diagnosis Procedure".
NO >> INSPECTION END