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.
Preparations:
ISUZU E-IDSS 2023 2019 Engine Diagnostic Service System Free Download
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