Honda Ridgeline. Manual — part 468
01
SJC8A00K782000Y1075FAAT00
−
−
−
−
−
−
−
−
DTC B1075:
YES
NO
YES
NO
YES
NO
YES
NO
22-168
Exterior Lights
DTC Troubleshooting
UNDER-HOOD FUSE/RELAY BOX CONNECTOR J (10P)
COMBINATION SWITCH 12P CONNECTOR
HEADLIGHT
BACKUP
(WHT)
Headlight SWITCH Signal Error
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-99).
1. Clear the DTCs with the HDS.
2. Turn the headlights switch from the OFF position to
the ON position.
3. Check for DTCs with the HDS.
Go to step 4.
Intermittent failure, the headlight circuit is OK
at this time. Check for loose or poor connections at
under-hood fuse/relay box connector J (10P), and
at the combination switch connector.
4. With the headlight switch OFF, select LIGHTING
SYSTEM from the HDS, and enter the DATA LIST.
5. Check the ON/OFF information of the HEADLIGHT
SWITCH (BACK-UP) in the DATA LIST.
Go to step 6.
Go to step 10.
6. Turn the headlight switch ON.
7. Check the ON/OFF information of the HEADLIGHT
SWITCH (BACK-UP) in the DATA LIST.
Faulty relay control module; replace the
under-hood fuse/relay box.
Go to step 8.
8. Disconnect the under-hood fuse/relay box
connector J (10P) and the combination switch 12P
connector.
9. Check for continuity between the No. 7 terminal of
under-hood fuse/relay box connector J (10P) and
the No. 4 terminal of the combination switch 12P
connector.
Faulty combination switch control unit or
relay control module; substitute a known-good
combination switch and retest. If the DTC is no
longer present, replace the original combination
switch. If the DTC is still present, the relay control
module is faulty, replace the under-hood fuse/relay
box.
Repair an open in the WHT wire.
Wire side of female terminals
Wire side of female terminals
Is DT C B107 5 indicated?
Is the inf or mation indicator OF F ?
Is the inf or mation indicator ON?
Is ther e continuity?
02
−
−
YES
NO
22-169
UNDER-HOOD FUSE/RELAY BOX CONNETOR J (10P)
HEADLIGHT BACKUP
(WHT)
10. Disconnect under-hood fuse/relay box connector J
(10P).
11. Check for continuity between the No. 7 terminal of
under-hood fuse/relay box connector J (10P) and
body ground.
Repair the short in the WHT wire.
Faulty relay control module; replace the
under-hood fuse/relay box.
Wire side of female terminals
Is ther e continuity?
01
02
SJC8AK3K782000Y1078FAAT00
−
−
−
−
−
−
−
−
−
−
DTC B1078:
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
22-170
Exterior Lights
DTC Troubleshooting (cont’d)
UNDER-HOOD FUSE/RELAY BOX CONNECTOR H (18P)
HEADLIGHT 3P CONNECTORS
WHT/GRN
WHT/
YEL
LEFT
RIGHT
HEADLIGHT 3P CONNECTORS
BLK
LEFT
RIGHT
RED/BLK
Daytime Running Lights Signal
Error
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-99).
Before troubleshooting, check the No. 3 (10 A) and
No. 5 (10 A) fuses in the under-hood fuse/relay box, and
headlight bulbs.
1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Press the parking brake pedal.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure. The daytime running
lights system is OK at this time. Check for loose or
poor connections.
5. Turn the headlights (high beam) ON.
Go to step 6.
Go to step 9.
6. Turn the headlight switch OFF.
7. Select LIGHTING SYSTEM from the HDS, and enter
the DATA LIST.
8. Check the ON/OFF information of the DRL
Command in the DATA LIST.
Check the BLU/WHT wire between under-
hood fuse/relay box connector H (18P) No. 10
terminal and the daytime running lights relay for an
open/short. If OK, replace the daytime running
lights relay.
Go to relay control module input test
(see page 22-125).
9. Check for continuity between the No. 3 terminal of
the headlight 3P connectors and the No. 7 (right
headlight) or No. 8 (left headlight) terminals of the
under-hood fuse/relay box connector H (18P).
Go to step 10.
Repair an open in the wire.
10. Check for continuity between the No. 2 terminal of
the left headlight 3P connector and body ground.
Faulty relay control module; replace the
under-hood fuse/relay box.
Check the daytime running lights relay (left
headlight only) (see page 22-75). If the relay is OK,
repair an open in the wire or poor ground (G301 left
side or G401 right side).
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is DT C B107 8 indicated?
Do both headlights come on?
Is the inf or mation indicator ON?
Is ther e continuity?
Is ther e continuity?
SJC8A00K713000Y1255FAAT00
SJC8A00K713000Y1275FAAT10
−
−
−
−
−
−
−
−
−
−
DTC B1255:
DTC B1275:
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
22-171
22-171
Combination Switch Control Unit
Lost Communication With MICU (MICU
message)
Headlight Switch OFF Position
Circuit Malfunction
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-99).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Check for DTCs with the HDS.
Go to step 4.
Intermittent failure, MICU is OK at this time.
Check for loose or poor connection at combination
switch control unit connector (12P), and at under-
dash fuse/relay box connector X (39P). If the
connections are good, check the battery condition
(see page 22-74) and the charging system.
4. Check for DTCs with the HDS.
Go to MICU input test (see page 22-117).
The combination switch control unit is faulty;
replace the combination switch.
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-99).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II),
and wait for 2 seconds.
3. Turn the parking (SMALL) light switch ON and wait
for 2 seconds.
4. Turn the headlight switch (LOW) ON and wait for
2 seconds.
5. Change the dimmer switch position from low beam
to high beam and wait for 2 seconds.
6. Check for DTCs with the HDS.
Go to step 7.
Intermittent failure, the headlight switch and
the combination switch control unit are OK at this
time. Check for loose or poor connections at the
headlight switch connector, and at the combination
switch connector.
7. With the headlight switch OFF select LIGHTING
SYSTEM with the HDS, and enter DATA LIST.
8. Check the ON/OFF information of the HEADLIGHT
SWITCH OFF in the DATA LIST.
Faulty combination switch control unit.
Replace the combination switch.
Go to step 9.
9. Do the headlight switch test (see page 22-181).
Repair the wire between the No. 5 terminal of
the headlight switch 6P connector and the No. 5
terminal of the combination switch 12P
connector.
The combination switch control unit is faulty;
replace the combination switch.
Is DT C B1255 indicated?
Ar e DT Cs B1055, B1106, and B1157 also
indicated?
Is DT C B127 5 indicated?
Is the inf or mation indicator ON, and change to
OF F when the headlight switch is put to the
PARK ING and the HEADLIGHT positions?
Is the headlight switch test OK ?
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