Honda HR-V: DTC Troubleshooting 51-12: Motor Power Source 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 51-12 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 MTR 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 MTR wire between the No. D1-4
(40 A) fuse in the
auxiliary under-dash fuse box A and the VSA modulator-control unit.
NO
The +B ABS/VSA MTR wire is OK. Install a new No. D1-4 (40 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 51-12 indicated?
YES
Go to step 5.
NO
The troubleshooting is complete.
5. Open wire check (+B ABS/VSA MTR line):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
VSA modulator-control unit 21P connector
- Measure the voltage between test points 1 and 2.
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Is there battery voltage?
YES
The +B ABS/VSA MTR wire is OK. Go to step 6.
NO
Repair an open in the +B ABS/VSA MTR wire between the No. D1-4 (40 A) fuse in
the auxiliary under-dash fuse box A and the VSA modulator-control unit.
6. VSA modulator-control unit check (update):
- Reconnect the following connector.
VSA modulator-control unit 21P connector (if disconnected)
- 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 51-12 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.
READ NEXT:
NOTE: Before you troubleshoot, review the general troubleshooting
information.
DTCs (VSA)
1. Solenoid operation check:
Turn the vehicle to the ON mode.
Clear the DTC with the HDS.
Turn the vehic
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 (
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 (
SEE MORE:
NOTE:
Check the vehicle 12 volt battery condition first.
Check the USB's specifications:
Mass-storage class ready digital audio player with USB 2.0 port
More than 256 MB storage space
Supports MP3, WMA, and AAC (encoded with the iTunes) files, DRM
files are not supported
Not all pla
Special Tools Required
Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially
available
NOTE:
Before beginning this troubleshooting, do a customer diagnostic
interview - Refer to: Fuel and
Emissions Systems Symptom Troubleshooting - Engine stalls Diagnostic
interview, or Fu