Honda Accord 2008 Manual page 2235

07/11/02 09:36:28 61TA0000_220_0205
Exterior Lights
DTC Troubleshooting (cont'd)
DTC B1279: Headlight Switch DIMMER
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 22-120).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back
to ON (II).
3. Turn the combination light (headlight) switch ON.
4. Change the dimmer switch from low beam to high
beam.
5. Turn the combination light switch OFF, and then to
the passing position, and wait for at least 6 seconds.
6. Check for DTCs with the HDS.
Is DT C B127 9 indicated?
YES − Go to step 7.
−
NO Intermittent failure, the system is OK at this
time. Check for loose or poor connections.
7. Select LIGHTING from the BODY ELECTRICAL
system select menu, then enter the DATA LIST.
8. Check each combination light switch position value
with the DATA LIST menu.
When the passing switch is operated
Headlight Switch (PASSING)
Headlight Switch (High beam)
When the headlight switch is turned ON, and the
dimmer switch changed from low beam to high
beam
Headlight Switch (PASSING)
Headlight Switch (High beam)
Headlight Switch (HEADLIGHT)
Are all data list values correct?
−
YES Faulty driver's MICU; replace the driver's
under-dash fuse/relay box (see page 22-84).
NO − Go to step 9.
22-202
Data List Value
ON
OFF
Data List Value
OFF
ON
ON
9. Turn the ignition switch to LOCK (0).
10. Disconnect the combination light switch 12P
connector.
11. Turn the ignition switch to ON (ll).
12. Select LIGHTING from the BODY ELECTRICAL
system select menu, then enter the DATA LIST.
13. Check each combination light switch position value
with the DATA LIST menu.
When the combination light switch is turned OFF
Data List
Headlight Switch (PASSING)
Headlight Switch (High beam)
Headlight Switch (HEADLIGHT)
Are all data list values indicated OF F ?
−
YES Go to step 17.
NO − Go to step 14.
14. Turn the ignition switch to LOCK (0).
15. Disconnect under-dash fuse/relay box connector R
(24P).
16. Check for continuity between body ground and the
driver's under-dash fuse/relay box connector R
(24P) No. 8, No. 21, and No. 22 terminals.
DRIVER'S UNDER-DASH FUSE/RELAY BOX
CONNECTOR R (24P)
PASSING SW (GRN)
Wire side of female terminals
Is there continuity?
−
YES Repair a short to ground in the wire.
NO − Faulty driver's MICU; replace the driver's
under-dash fuse/relay box (see page 22-84).
ＴＡ０８Ａ００Ｋ７６９０００Ｙ１２７９ＦＡＡＴ００
Value
OFF
OFF
OFF
H/L ON SW (BRN)
DIMMER SW
(LT BLU)
＊０１