HINO 600 Series P003A VNT Abnormality Trouble Repair

This instruction show you guide on how to repair HINO 600 series truck P003A abnormality in VNT initialize trouble.For more information about HINO cases,please refer to:HINO Trouble Repair.

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Preparations:

2022.10 HINO Diagnostic Explorer DX3/DX2 Diagnostic Software Free Download

 

Procedures:

Step 1:

Check the DTC detected 1 (Engine ECU) by HINO DX2 diagnostic software

1Connect the vehicle to HINO DX Ⅱ.

2Set the starter switch to the “ON” position.

3Select [Engine] and check if any DTC other than P003A (for example, U010C) has been detected.

HINT

Due to CAN communication failures, P003A may have been detected.

 

Has a DTC other than P003A been detected?

Yes,go to diagnosis procedure of a related DTC,after repairing go to step 2.

No,go to step 3

 

Step 2:

Check the DTC detected 2 (Engine ECU) by HINO DX2 diagnostic software

1Set the starter switch to the “ON” position.

2Select [Engine] and check if P003A has been detected.

Has DTC P003A been detected?

Yes,go to step 3

No,procedure completed.

Perform “After-inspection work” of INFORMATION section

 

Step 3:

Inspect the operation of the VNT controller by HINO DX2

1.Set the starter switch to the “ON” position.

2.Erase the trouble history using HINO DX Ⅱ.

3.Set the starter switch to the “LOCK” position.

4.Set the starter switch to the “ON” position again.

5.Select [Engine] and check if P003A has been detected.

 

HINT

Turn the starter switch OFF and ON verifies the wiping operation of the VNT actuator (DC motor).

 

Has DTC P003A been detected?

Yes,repalce the turbocharger.Perform “After-inspection work” of INFORMATION section

No,go to step 4

 

Step 4:

Check the response delay of the VNT controller by HINO DX2 diagnostic software

1.Select [Inspection Menu]_[VNT inspection] from the menu, and inspect the response delay at the Target VNT position and Actual VNT position.

 

CAUTION

  • Perform the inspection while the engine is stopped to avoid engine damages.

 

<Inspection procedure>

(1) Select [Inspection Menu].

(2) Select [VNT inspection].

(3) Click [Start inspecton].

(4) Click [VNT UP].

‧ Inspect the response delay at each step of the Target VNT position and Actual VNT position from 0 to 90 %.

(5) Click [VNT DOWN].

‧ Inspect the response delay at each step of the Target VNT position and Actual VNT position from 90 to 0 %.

 

HINT

  • The VNT opening position changes of 10 % per step between 0 – 90 %.

 

Are the measurements within standard value?(The response delay should be less than 3 seconds.)

Yes,procedure completed.Perform “After-inspection work” of INFORMATION section

No,replace the turbocharger.Perform “After-inspection work” of INFORMATION section

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