JCB ISUZU 6HK1 Engine U0110 VNT System Lost Communication Solution

This instruction show you guide on how to solve JCB Isuzu 6HK1 INT-Tier4 engine DTC U0110 Flash Code 87 lost communication with VNT system error.

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Preparations:

ISUZU E-IDSS 2022 2019 Engine Diagnostic Service System Free Download

ISUZU IDSS Diagnostic Tool

 

Procedures:

U0110 Diagnostics

1 Turn OFF the ignition switch.

2 Remove the harness connector from the turbo control unit.

3 Measure the voltage between the ISO CAN-Low circuit and GND of the turbo control unit harness connector.

4 Measure the voltage between the ISO CAN-High circuit and GND of the turbo control unit harness connector.

Voltage:1.5 to 3.5 V

5 If the reading is outside the specified range, inspect to see if there is an open circuit or high resistance with the ISO CAN-High circuit between the turbo control unit and the ECM.

6 If a problem is found, repair the ISO CAN-High circuit.

7 Inspect to see if there is an open circuit or high resistance with the ISO CAN-Low circuit between the turbo control unit and the ECM.

8 If a problem is found, repair the ISO CAN-Low circuit.

9 Inspect the turbo control unit harness connector for a poor connection.

10 If a problem is found, repair the harness connector.

11 Replace the turbocharger assembly.

 

U0110 Confirm Resolution

1 Clear the DTC using the trouble diagnosis scan tool.

2 Turn OFF the ignition switch for at least 30 seconds.

3 Start the engine.

4 Perform a test-run.

5 Use the trouble diagnosis scan tool to confirm that a DTC has not been detected.

 

More repair cases for ISUZU engine,please refer to:ISUZU Engine Trouble Repair

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