Honda HR-V: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A
- Initial Communication And DTC Checks
Check the PCM for DTCs and troubleshoot PCM or F-CAN loss of communication
errors first, then do this
diagnosis if the symptom is related to the B-CAN system.
1. Compare the symptom with this list of B-CAN related systems:
- Audio and audio-navigation
- Gauge control module
- Exterior lights
- Turn signals
- Entry light control
- Interior lights
- Safety indicators
- Horns (security and panic)
- Reminder chimes (Key-in, seat belt, lights-on, and parking brake)
- Power window/moonroof timer
- Wiper/washer
- Security
- Keyless entry
- Key interlock
- Power door locks
- Dashlights brightness
- Immobilizer
- Keyless access control
- Climate control
- Seat heater
- If the symptom is related to the B-CAN, go to step 2.
- If the symptom is not related to the B-CAN, go to the system symptom
troubleshooting.
2. Connect the HDS to the data link connector (DLC), then turn the vehicle
to the ON mode.
3. From the BODY ELECTRICAL SYSTEM SELECT menu, select B-CAN CONTROL UNITS
INFORMATION, and then select CHECK CONNECTED CONTROL UNITS listed to see if the
following
control units are communicating with the HDS.
- Audio unit or audio-navigation unit
- MICU
- Gauge control module
- Climate control unit
- Automatic lighting control unit/sensor
- Immobilizer-keyless control unit
- Keyless access control unit
- Front seat heater control unit
NOTE :
- If a unit is communicating with the HDS, "DETECT" is displayed.
- If a unit is not communicating or the vehicle is not equipped, "NOT
AVAILABLE" is displayed.
- The HDS only checks the status one time when BODY ELECTRICAL is
selected. To recheck the status
after repair, reboot the HDS.
- If all control units are communicating with the HDS, go to step 4.
- If any of the control units are not communicating, go to B-CAN System
Diagnosis Test Mode B - Refer to: Body Electrical Troubleshooting - B-CAN
System Diagnosis Test Mode B - Control Unit Not
Communicating.
- If all units are not communicating or only the MICU is communicating, go
to MICU DTC U1280
troubleshooting.
4. Select the system that has the problem from the BODY ELECTRICAL SYSTEM
SELECT menu, then select
DTCs.
- If any DTCs are indicated, go to step 5.
- If the problem is related to one of the following items and the system
that is malfunctioning does not
stop or turn off, go to B-CAN System Diagnosis Test Mode C - Refer to: Body
Electrical
Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output
Won't Shut OFF
- If the problem is related to one of the following items and the system
that is malfunctioning does not run
or turn on, go to B-CAN System Diagnosis Test Mode D - Refer to: Body
Electrical Troubleshooting -
B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON.
- Exterior lights
- Turn signals
- Entry light control
- Interior lights
- Horns (security and panic)
- Wiper/washer
- Power door locks
- If the problem is related to one of the following items, go to the
troubleshooting for that individual
system.
- Gauge control module
- Safety indicators
- Reminder chimes (Key-in, seat belt, lights-on, and parking brake)
- Security
- Keyless entry
- Dashlights brightness
- Immobilizer
- Rear window defogger (climate control)
- Climate control
- Keyless access control
- Seat heater
5. Record all DTCs, and sort them by DTC type, then troubleshoot them in this
order:
- Internal error DTCs.
- Loss of communication DTCs.
- Signal error DTCs.
BODY ELECTRICAL TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE B -
CONTROL UNIT NOT COMMUNICATING
Do 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 - Refer to: Body
Electrical Troubleshooting -
B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks.
1. Using the HDS, select the system that has the symptom from the BODY
ELECTRICAL SYSTEM SELECT
menu
2. Select DTCs, and then check for loss of communication DTCs.
- If any loss of communication DTCs are indicated, go to step 3.
- If any loss of communication DTCs are not indicated, faulty MICU;
replace the under-dash fuse/relay
box.
3. Do the power, ground, and communication part of the input test for the
unit(s) not communicating with the
HDS.
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READ NEXT:
Do this diagnosis if a component that is controlled by the B-CAN system does
not stop or turn off.
NOTE :
If the component does not turn on, go to B-CAN System Diagnosis Test
Mode D - Refer to: B
NOTE : If you suspect the HDS or the HDS DLC cable may be the source of the
communication problem,
verify that they are working properly by connecting them to a known-good,
similar vehicle and syste
SEE MORE:
Special Tools Required
SRS Short Canceller 070AZ-SAA0100
NOTE:
Before doing this troubleshooting procedure, find out if the vehicle was
in a collision. If so, verify
that all the required components were replaced with new components of the
correct part number,
and that they were properly ins
Special Tools Required
Bearing Driver Attachment, 62 x 68 mm
07746-0010500
Driver Handle, 15 x 135L 07749-0010000
Bearing Driver Attachment, 62 x 64 mm
07947-6340400
Replacement
NOTE:
The carrier bearing and the carrier bearing outer race should be
replaced as a set.
Adjust the carrier