What is RHCM Harley?
Right Hand Control Module issue (RHCM)
What does lost communication with ECM / PCM mean?
Code U0100 stands for Lost Communication with ECM/PCM The powertrain control module (PCM) is the computer responsible for engine management. Like the other computers (known as modules) onboard your vehicle, the PCM communicates over a bus.
Is there a lost communication code for u0100?
Codes U0100 to U0300 are lost communication with XX module codes. U0100 is monitored when the ignition is on, battery voltage is at a certain level and other key modules are configured correctly. No comments yet…
What does the u0100 code on the ECM mean?
If you can access codes from the ECM/PCM, then the U0100 code is either intermittent or a memory code. If unable to access codes for the ECM/PCM, then the U0100 code that the other modules are setting is active, and the problem is there now. The most common failure is loss of power or ground.
What causes no crank and u0100 lost communication with ECM?
All the trouble was caused by a mouse chewing through some wires under the battery and fuse box. I was just going to say to check the fuse box under the hood. Mine has rattled itself loose twice. Bolted it back down after inspecting for damage and everything went back to normal.
What is the code for lost communication with an ECM?
All the ‘U’ codes are network communication codes. Codes U0100 to U0300 are lost communication with XX module codes. U0100 is monitored when the ignition is on, battery voltage is at a certain level and other key modules are configured correctly.
Codes U0100 to U0300 are lost communication with XX module codes. U0100 is monitored when the ignition is on, battery voltage is at a certain level and other key modules are configured correctly. No comments yet…
If you can access codes from the ECM/PCM, then the U0100 code is either intermittent or a memory code. If unable to access codes for the ECM/PCM, then the U0100 code that the other modules are setting is active, and the problem is there now. The most common failure is loss of power or ground.
All the trouble was caused by a mouse chewing through some wires under the battery and fuse box. I was just going to say to check the fuse box under the hood. Mine has rattled itself loose twice. Bolted it back down after inspecting for damage and everything went back to normal.