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HOMESERVICE MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 177 (MULTIPLEX INTEGRATED CONTROL SYSTEM)DTC TROUBLESHOOTINGDTC B1959: MICU-REAR JUNCTION BOX LOST COMMUNICATION WITH RELAY CONTROL MODULE (R/M MESSAGE)
2002 Honda Civic Si

DTC B1959: MICU-Rear Junction Box Lost Communication with Relay Control Module (R/M Message)

2002 Honda Civic SiSECTION DTC B1959: MICU-Rear Junction Box Lost Communication with Relay Control Module (R/M 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 B1959 indicated? 

    1. YES  - Go to step 5.
    2. NO  - Intermittent failure, the communication line is OK at this time. Check for loose or poor connections.
  5. Check for DTCs with the HDS.

    Are DTCs B1005 and B1158 also indicated? 

    1. YES  - Go to the relay control module input test (see RELAY CONTROL MODULE INPUT TEST  ).
    2. NO  - Go to the MICU-rear junction box input test (see MICU - REAR JUNCTION BOX INPUT TEST  ).
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