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HOMESERVICE MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 177 (MULTIPLEX INTEGRATED CONTROL SYSTEM)DTC TROUBLESHOOTINGDTC B1005: MICU LOST COMMUNICATION WITH RELAY CONTROL MODULE
2002 Honda Civic Si

DTC B1005: MICU Lost Communication with Relay Control Module

2002 Honda Civic SiSECTION DTC B1005: MICU Lost Communication with Relay Control Module
WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. 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 OFF, and then back ON (II).
  3. Wait for 6 seconds or more.
  4. Check for DTCs with the HDS.

    Is DTC B1005 indicated? 

    1. YES  - Go to step 5.
    2. NO  - Intermittent failure, the relay control module is OK at this time. Check for loose or poor connection at the relay control module connector K (10P), and at the driver's under-dash fuse/relay box connector D (17P). If the connections are good, check the battery condition (see BATTERY TEST ) and the charging system.
  5. Check for DTCs with the HDS.

    Are DTCs B1158 and B1959 also indicated? 

    1. YES  - Go to relay control module input test (see RELAY CONTROL MODULE INPUT TEST  ).
    2. NO  - Check for an open in the communication circuit between the MICU and the relay control module. If the circuit is OK, replace the MICU. If the circuit is bad, repair the open.
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