DTC DETECTION LOGIC
DTC No. | Trouble diagnosis name (Trouble diagnosis content) | DTC detecting condition | Possible cause |
P0037 | HO2 HTR (B1) (Heated oxygen sensor 2 heater control circuit low) | The current amperage in the heated oxygen sensor 2
heater circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM through the heated oxygen sensor 2 heater.) |
|
P0038 | HO2 HTR (B1) (Heated oxygen sensor 2 heater control circuit high) | The current amperage in the heated oxygen sensor 2
heater circuit is out of the normal range.
(An excessively high voltage signal is sent to ECM through the heated oxygen sensor 2 heater.) |
|
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
With GST
Follow the procedure "With CONSULT" above.
Is 1st trip DTC detected?
YES >> Proceed to EC, "Diagnosis Procedure".
NO >> INSPECTION END
1.CHECK HO2S2 POWER SUPPLY CIRCUIT
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace errordetected parts.
2.CHECK HO2S2 OUTPUT SIGNAL CIRCUIT
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace errordetected parts.
3.CHECK HEATED OXYGEN SENSOR 2 HEATER
Check the heated oxygen sensor 2 heater. Refer to EC, "Component Inspection".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI, "Intermittent Incident".
NO >> GO TO 4.
4.REPLACE HEATED OXYGEN SENSOR 2
Replace heated oxygen sensor 2. Refer to EX, "Exploded View".
CAUTION: - Discard any sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
- Before installing new sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [commercial service tool (J4389718 or J4389712)] and approved Antiseize Lubricant (commercial service tool).
>> INSPECTION END
1.CHECK HEATED OXYGEN SENSOR 2 HEATER
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE HEATED OXYGEN SENSOR 2
Replace heated oxygen sensor 2. Refer to EX, "Exploded View".
CAUTION:
>> INSPECTION END
Starting the engine (models without NISSAN Intelligent Key system)
1. Apply the parking brake.
2. Automatic Transmission / CVT models:
Move the shift lever to P (Park) or N (Neutral).
P (Park) is recommended.
The shift lever cannot be moved out of
P (Park) and into any of the other gear
positions if the ignition key is turned to
the OFF position or if ...
Line pressure control
Line pressure control : system diagram
Line pressure control : system description
When an engine and A/T integrated control signal (engine torque)
equivalent to the engine drive force is
transmitted from the ECM to the TCM, the TCM controls the line pressure
solenoid valve.
Th ...