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This instruction show you guide on how to diagnose and repair Doosan machine with ISUZU 6UZ1 INT-Tier 4 engine lost communication with TCM U0101 Flash code 85 error.
Related Contents:
ISUZU E-IDSS 2022 2019 Engine Diagnostic Service System Free Download
ISUZU IDSS Diagnostic Tool
Procedures:
1.Inspect the CAN-Low circuit and CAN-High circuit between the ECM and the control unit of the machine.
There should be no short to the battery or ignition power source.
There should not be an open circuit or high resistance.
There should be no short to GND.
2.If a problem is found, repair the CAN circuit.
3.If the CAN circuit is normal, connect all harnesses.
4.Clear the DTC using the trouble diagnosis scan tool.
5.Turn OFF the ignition switch for at least 30 seconds.
6.Perform a test-run.
7.Check the DTC.
8.If a DTC has been detected, replace the control unit of the machine.
9.Connect all harnesses.
10.Clear the DTC using the trouble diagnosis scan tool.
11.Turn OFF the ignition switch for at least 30 seconds.
12.Perform a test-run.
13.Check the DTC.
14.If a DTC has been detected, replace the ECM.
15.Set the Injector ID Code and engine No. on the ECM.
2.U0101 Confirm Resolution
Clear the DTC using the trouble diagnosis scan tool.
Turn OFF the ignition switch for at least 30 seconds.
Start the engine.
Perform a test-run.
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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