Honda HR-V: DTC Troubleshooting 81-11: Modulator-Control Unit Internal Circuit Malfunction
Honda HR-V (2015-2021) Service Manual / Brakes / VSA System - Diagnostics / DTC Troubleshooting / DTC Troubleshooting 81-11: Modulator-Control Unit Internal Circuit
Malfunction
NOTE: Before you troubleshoot, review the general troubleshooting information.
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1. Problem verification:
- Turn the vehicle to the ON mode.
- Clear the DTC with the HDS.
- Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.
- Check for DTCs with the HDS.
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Is DTC 81-11 indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.
2. VSA modulator-control unit check (update):
- Update the VSA modulator-control unit if it does not have the latest software.
- Turn the vehicle to the OFF (LOCK) mode, then the ON mode.
- Check for DTCs with the HDS.
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Is DTC 81-11 indicated?
YES
Check for loose terminals in the VSA modulator-control unit 21P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit.
NO
Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.
READ NEXT:
DTC Troubleshooting 81-13: Modulator-Control Unit Internal Circuit
Malfunction
NOTE: Before you troubleshoot, review the general troubleshooting
information.
1. Problem verification:
Turn the vehicle to the ON mode.
Clear the DTC with the HDS.
Turn the vehicle to the OFF (
DTC Troubleshooting 81-19: Yaw Rate Sensor (Inside of Modulator-Control
Unit) Internal Circuit Malfunction
NOTE:
Before you troubleshoot, review the general troubleshooting information.
The yaw rate-acceleration sensor is built into the VSA modulator-control
unit.
Before troubleshooting, check the VS
DTC Troubleshooting 81-20: Acceleration Sensor (Inside of Modulator-Control
Unit) Internal Circuit Malfunction
NOTE:
Before you troubleshoot, review the general troubleshooting information.
While doing this troubleshooting, avoid vibration or shaking of the
vehicle.
The yaw rate-acceleration sensor is bu
SEE MORE:
Ignition System - Inspection & Adjustment
INSPECTION & ADJUSTMENT
IGNITION TIMING INSPECTION
Inspection
1. HDS DLC - Connect
NOTE: For specific operations, refer to the user's manual that came with the
HDS. Make sure the
HDS is loaded with the latest software.
Turn the vehicle to the OFF (LOCK) mode.
Connect the HDS to the DLC.
Tur
Disassembly - CVT Transmission Disassembly and Reassembly (CVT)
NOTE:
Refer to the Exploded View as needed during this procedure.
Keep all foreign particles out of the transmission.
1. Transfer Assembly - Remove (With AWD)
Remove the transfer (A) with the O-ring (B)
Remove the dowel pin (C).
2. Transmission Range Switch - Remove
Turn the control leve
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