P0237

P0237, P0238 TC BOOST SENSOR

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
1.Turn ignition switch OFF and wait at least 10 seconds.
2.Turn ignition switch ON.
3.Turn ignition switch OFF and wait at least 10 seconds.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

1.Turn ignition switch ON and wait at least 5 seconds.
2.Check 1st trip DTC.
Is 1st trip DTC detected?
YES- Proceed to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK TURBOCHARGER BOOST SENSOR POWER SUPPLY

1.Disconnect turbocharger boost sensor harness connector.
2.Turn ignition switch ON.
3.Check the voltage between turbocharger boost sensor harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. CHECK SENSOR POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check harness connector for short to power and short to ground, between the following terminals.





Is inspection result normal?
YES- Perform the trouble diagnosis for power supply circuit.
NO- Repair or replace error-detected parts.

3. CHECK TURBOCHARGER BOOST SENSOR GROUND CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between turbocharger boost sensor harness connector and ECM harness connector.





4.Also check harness for short to power.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace error-detected parts.

4. CHECK TURBOCHARGER BOOST SENSOR INPUT SIGNAL CIRCUIT

1.Check the continuity between turbocharger boost sensor harness connector and ECM harness connector.





2.Also check harness for short to ground and to power.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace error-detected parts.

5. CHECK TURBOCHARGER BOOST SENSOR

Check the turbocharger boost sensor. .
Is the inspection result normal?
YES- Check intermittent incident. Intermittent Incident.
NO- Replace turbocharger boost sensor. Exploded View.


Component Inspection


1. CHECK TURBOCHARGER BOOST SENSOR

1.Turn ignition switch OFF.
2.Remove turbocharger boost sensor with its harness connector.





3.Install pressure pump (A) to turbocharger boost sensor (1).

CAUTION:
When insert a pressure pump hose to the sensor, be careful to the damage of the sensor housing.
4.Turn ignition switch ON.
5.Check the voltage between ECM harness connector terminals as per the following conditions.
NOTE:
- Always calibrate the pressure pump gauge when using it.
- Inspection should be done at room temperature [10 - 30�C (50 - 86�F)].





Is the inspection result normal?
YES- INSPECTION END
NO- Replace turbocharger boost sensor. Exploded View.