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HOMESERVICE MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 177 (MULTIPLEX INTEGRATED CONTROL SYSTEM)DTC TROUBLESHOOTINGDTC B1007: MICU LOST COMMUNICATION WITH COMBINATION SWITCH CONTROL UNIT (HEADLIGHT SWITCH MESSAGE)
2002 Honda Civic Si

DTC B1007: MICU Lost Communication with Combination Switch Control Unit (Headlight Switch Message)

2002 Honda Civic SiSECTION DTC B1007: MICU Lost Communication with Combination Switch Control Unit (Headlight Switch Message)
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 B1007 indicated? 

    1. YES  - Go to step 5.
    2. NO  - Intermittent failure, the MICU is OK at this time. Check for loose or poor connection at the combination switch control unit connector (8P), and at the driver's under-dash fuse/relay box connector X (39P). 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 B1062, B1155, B1555, and B1957 also indicated? 

    1. YES  - Go to the combination switch control unit input test (see COMBINATION SWITCH CONTROL UNIT INPUT TEST  ).
    2. NO  - Check for an open in the communication circuit between the MICU and the combination switch control unit. If the circuit is OK, replace the MICU. If the circuit is bad, repair the open.
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