Honda HR-V: DTC B1275, B1276, B1277, B1278 : Headlight Malfunctions
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DTC (MICU)
NOTE : If you are troubleshooting multiple DTCs, be sure to follow the
instructions in 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. Problem verification:
- Check the parameter(s) below with the HDS.
When the combination light switch is turned OFF
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When the combination light switch is turned to POSITION (PARKING)
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When the combination light switch is turned to AUTO
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When the combination light switch is turned ON (HEADLIGHT)
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Are all data list values correct?
YES
Intermittent failure, the system is OK at this time. Check for loose or poor
connections.
NO
Go to step 2.
2. Exterior lights system check:
- Check the parameter(s) below with the HDS.
Cycle through all switch selections
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Is any data list value OFF, not ON?
YES
Go to step 5.
NO
Go to step 3.
3. Determine possible failure area (combination light switch, others):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Combination light switch 12P connector
- Check the parameter(s) below with the HDS.
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Are all data lists values OFF?
YES
Replace the combination light switch.
NO
Go to step 4.
4. Shorted wire check (H/L OFF SW, H/L ON SW, PARKING LT SW lines):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Under-dash fuse/relay box connector B (20P)
- Check for continuity between test points 1 and 2 individually.
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Is there continuity?
YES
Repair a short to ground in the wire.
NO
The H/L OFF SW, H/L ON SW, and PARKING LT SW wires are OK. Faulty MICU;
replace the underdash
fuse/relay box.
5. Determine possible failure area (combination light switch, others):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Combination light switch 12P connector
- Connect terminals A and B with a jumper wire.
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- Check the parameter(s) below with the HDS.
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Has the data list value changed from OFF to ON?
YES
Replace the combination light switch.
NO
Go to step 6.
6. Open wire check (H/L OFF SW, H/L ON SW, PARKING LT SW, COMBI SW GND (LT)
lines):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Under-dash fuse/relay box connector B (20P)
- Check for continuity between test points 1 and 2 respectively.
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Is there continuity?
YES
The H/L OFF SW, H/L ON SW, PARKING LT SW, and COMBI SW GND (LT) wires are OK.
Faulty
MICU; replace the under-dash fuse/relay box.
NO
Repair an open or high resistance in the wire.
READ NEXT:
DTC (MICU)
NOTE : If you are troubleshooting multiple DTCs, be sure to follow the
instructions in B-CAN System
Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System
Diagn
DTC (MICU)
NOTE : If you are troubleshooting multiple DTCs, be sure to follow the
instructions in B-CAN System
Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System
Diagn
DTC Troubleshooting: B1281, B1282, B1283, B1284
DTC (MICU)
NOTE : If you are troubleshooting multiple DTCs, be sure to follow the
instructions in B-CAN System
Diagnosis Test Mode A - Refer to: Body
SEE MORE:
DTC TROUBLESHOOTING
FORWARD COLLISION WARNING (FCW) DTC TROUBLESHOOTING INDEX
LANE DEPARTURE WARNING (LDW) DTC TROUBLESHOOTING INDEX
TESTING
MULTIPURPOSE CAMERA UNIT UPDATE
Any one of the above updating tools can be used.
Special Tools Required
MVCI unit with
the latest control
module (CM)
update
When the ignition switch is in ON (II)*1, you
can use the (select/reset) knob to
adjust
instrument panel brightness.
Brighten: Turn the knob to the right.
Dim: Turn the knob to the left.
You will hear a beep when the brightness
reaches minimum or maximum. The
information display will return to it