LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Honda >> 2014 >> Pilot EX, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 (Multiplex Integrated Control System) >> DTC Troubleshooting >> DTC B1005: MICU Lost Communication With Relay Control Module
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B1005: MICU Lost Communication With Relay Control Module

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2014 Honda Ridgeline, 2013 Honda Ridgeline, 2012 Honda Ridgeline, 2011 Honda Ridgeline, and 2010 Honda Ridgeline. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
  1. Clear the DTCs with the HDS.
  2. Turn the ignition switch to LOCK (0) and then back to ON (II).
  3. Wait for 6 seconds or more.
  4. Check for DTCs with the HDS.

    Is DTC B1005 indicated? 

    YES  -Go to step 5.

    NO  -Intermittent failure, the communication bus line is OK at this time. Check for loose or poor connections, or worn/shorted wires. If the connections are good, check the battery condition (see BATTERY TEST ) and the charging system (see CHARGING SYSTEM ).

  5. Check for DTCs with the HDS.

Is DTC B1158 also indicated? 

YES  -Do the relay control module input test (see RELAY CONTROL MODULE INPUT TEST ). ■

NO  -Do the MICU input test (see MICU INPUT TEST ). ■