HINO 600 Series Truck Urea Pump Reverting Valve Low P20A2 Solution

Here is the instruction guide on how to solve urea pump reverting valve low malfunction for HINO 600 series.

 

Related Contents:

Nexiq USB2 Diagnostic Adapter

2024.01 HINO Diagnostic Explorer DX3/DX2 Diagnostic Software Free Download

HINO Trucks EPC Electronic Parts Catalog 2018 2016 Free Download

 

Preparations:

1Inspect the DEF pump (reverting valve) connector

Check the connection of the DEF pump connector (Looseness and poor contact).

Was any failure found?

Yes,Connect securely,repair if needed.Perform”After-inspection work”Information section.

No,Go to steps

 

2 Inspect the DEF pump(reverting valve)unit

HINO 600 Series Truck Urea Pump Reverting Valve Low P20A2 Solution (1)

1)Set the starter switch to the “LOCK” position.

2)Disconnect the DEF pump connector.

3)Use the electrical tester to measure the resistance between the terminals of the DEF pump (reverting valve).

HINO 600 Series Truck Urea Pump Reverting Valve Low P20A2 Solution (2)

Do the measurements meet the standard value?

Yes,Go to step3

No,Replace the DEF pump.Per form”After-inspection work” INFORMATION section.

 

3 Inspect for short-circuit in the DEF pump (reverting valve) harness

HINO 600 Series Truck Urea Pump Reverting Valve Low P20A2 Solution (3)

Disconnect the DCU 86P connector.

Use the electrical tester to measure the resistance between the terminals of the DCU 86P vehicle-side connector and the ground.

HINO 600 Series Truck Urea Pump Reverting Valve Low P20A2 Solution (4)

Do the measurements meet the standard value?

Yes,Go to step 4

No,Repair or replace the harness.Per form”After-inspection work” of INFORMATION section.

 

4 Inspect disconnection of the DEF pump (reverting valve) harness

HINO 600 Series Truck Urea Pump Reverting Valve Low P20A2 Solution (5)

1)Connect the DEF pump connector.

2)Connect the signal check harness and use the electrical tester to measure the resistance between the terminals of the DCU 86P vehicle-side connector.

HINO 600 Series Truck Urea Pump Reverting Valve Low P20A2 Solution (6)

Do the measurements meet the standard value?

Yes,Go to step 5

No,Repair or replace the harness.Per form”After-inspection work” of INFORMATION section.

 

5 Check the DTC detected (DCU)

HINO 600 Series Truck Urea Pump Reverting Valve Low P20A2 Solution (7)

1.Connect the vehicle to HINO DXⅡ.

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

3.Select [DCU] and check if P20A2 has been detected.

 

Has DTC P20A2 been detected?

Yes,Replace the DCU. (Perform a DPR forced regeneration after replacement.)

Perform”After-inspection work” of INFORMATION section.

No,Procedure completed.Perform”After-inspection work of INFORMATION section.

 

More case for HINO please refer to:HINO Trouble Repair.

Visited 1 times, 1 visit(s) today