Honda HR-V: DTC Troubleshooting 54-11, 54-12: Fail-Safe Relay Stuck
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 54-11 or 54-12 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. Fuse check:
- Turn the vehicle to the OFF (LOCK) mode.
- Check the following fuse.
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Is the fuse OK?
YES
The fuse is OK. Reinstall the fuse, then go to step 5.
NO
Go to step 3.
3. Shorted wire check (+B ABS/VSA FSR line):
- Disconnect the following connector.
VSA modulator-control unit 21P connector
- Check for continuity between test points 1 and 2.
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Is there continuity?
YES
Repair a short to body ground in the +B ABS/VSA FSR wire between the No. D5 (30 A) fuse in the auxiliary under-dash fuse box A and the VSA modulator-control unit.
NO
The +B ABS/VSA FSR wire is OK. Install a new No. D5 (30 A) fuse in the auxiliary under-dash fuse box A, then go to step 4.
4. VSA modulator-control unit check:
- Reconnect the following connector.
VSA modulator-control unit 21P connector
- 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 54-11 or 54-12 indicated?
YES
Go to step 5.
NO
The troubleshooting is complete.
5. 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 to the ON mode.
- Check for DTCs with the HDS.
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Is DTC 54-11 or 54-12 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.
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DTC Troubleshooting 56-11: Fail-Safe Relay Power Source 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 58-11: Brake Diag Circuit OFF Failure
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 58-12: Brake Diag Circuit ON Failure
NOTE: Before you troubleshoot, review the general troubleshooting
information.
1. Brake light relay relay check:
Turn the vehicle to the OFF (LOCK) mode.
Check the brake lights without pressing t
SEE MORE:
Description
COMMUNICATION SYSTEMS DESCRIPTION (F-CAN) - OVERVIEW
F-CAN (High-speed CAN)
The network between the powertrain and control units for chassis system is
called F-CAN and it employs high
speed CAN with communication rate at 500 kbps.
Typical CAN Bus Communication Operation
The F-CAN detects the diffe
How to Information
HOW TO TROUBLESHOOT THE EPS
EPS Indicator
Under normal conditions, the EPS indicator (A) comes on when turning the
vehicle to the ON mode, then goes
off after the engine is started. This indicates that the LED and its circuit are
operating correctly.
If there is a failure in the system after the
