Troubleshooting - B-CAN System Diagnosis Test Mode B

Perform this diagnosis if any of the control units are not communicating (Not Available is displayed in the HDS) as found by the B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A  ).

1. Using the HDS, select the system that has the symptom from BODY ELECTRICAL.
2. Select DTCs, and then check for loss of communication DTCs. Refer to loss of communication DTC cross reference chart.

   Are any loss of communication DTCs indicated? 

   YES  - Go to step 3.

   NO  - Replace the MICU.

3. Perform the input test for the unit not communicating with the HDS.
   NOTE: Troubleshoot Rear MICU loss of communication DTCs before troubleshooting AcuraLink control unit (XM receiver) the power tailgate control unit, and the power seat control unit DTC.
   UNIT NOT COMMUNICATING - INPUT TEST REFERENCE
   
   

   Unit not communicating
   MICU (see MICU INPUT TEST  )
   Gauge control module (see GAUGE CONTROL MODULE INPUT TEST )
   Relay control module (see RELAY CONTROL MODULE INPUT TEST  )
   Driver's MPCS unit (see DRIVER'S MPCS UNIT INPUT TEST )
   Combination switch control unit (see WIPER/WASHER SWITCH (COMBINATION SWITCH CONTROL UNIT) INPUT TEST )
   Immobilizer-keyless control unit (see IMMOBILIZER-KEYLESS CONTROL UNIT INPUT TEST )
   Rear MICU (see REAR MICU INPUT TEST  )
   Power seat control unit (see POWER SEAT CONTROL UNIT INPUT TEST )
   Power tailgate control unit (see CONTROL UNIT INPUT TEST/REPLACEMENT )
   Climate control unit troubleshooting (see CLIMATE CONTROL UNIT TROUBLESHOOTING )