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Under-Dash Fuse/Relay Box (B)

Fig 1: Driver's Under-Dash Fuse/Relay Box (B) Replacement Components
GHH464692Courtesy of HONDA, U.S.A., INC.
Under-Dash Fuse/Relay Box (B) Legend

Fuse Number Amps Component(s) or Circuit(s) Protected
B1 --- Not used
B2 15 A CMP sensor A,
Electrical load detector (ELD),
EVAP canister purge valve,
MAF sensor,
PCM (BKSWNC) (Via brake pedal position switch),
Secondary HO2S (sensor 2)
B3 10 A SRS unit
B4 15 A Electric steering lock*2,
Fuel pump (Via PGM-FI main relay 2),
Keyless access/TPMS control unit,
PCM (IG1 (FUEL PUMP)),
Starter cut relay 1,
Starter cut relay 2
B5 7.5 A A/T gear position indicator,
Gauge control module,
MICU (IG1 METER),
Reverse relay circuit (Built into the under-dash fuse/relay box),
Shift lock solenoid
Via reverse relay circuit built into the under-dash fuse/relay box:
Audio display unit (Via reverse relay circuit)*11,
Audio unit*12,
Audio-navigation unit*6,
Automatic dimming inside mirror*7,
Back-up lights,
MICU (BACK LT)
B6 7.5 A ANC/active sound control unit,
Left side BSI radar unit*3,
Millimeter wave radar*4,
Multipurpose camera unit (IG1 OPTION)*4,
Multipurpose camera unit (LDW OFF SW) (Via RDM/LDW off switch)*4,
Power seat control unit*9,
RDM/LDW off switch indicator*4,
Right side BSI radar unit*3,
Telematics control unit*1*6,
Windshield washer motor relay,
Windshield wiper main relay
B7 7.5 A PCM (IG MISS SOL)
B8 15 A Front passenger's door lock actuator,
Right rear door lock actuator
B9 15 A Left rear door lock actuator
B10 15 A Audio unit*5,
Audio-navigation unit*6
B11 20 A Moonroof motor-control unit
B12 20 A Driver's power seat adjustment switch*8,
Power seat control unit*9
B13 20 A Driver's power seat adjustment switch*8,
Power seat control unit*9
B14 15 A Driver's seat heater relay (high)*13,
Driver's seat heater relay (low)*13,
Front passenger's seat heater relay (high)*13,
Front passenger's seat heater relay (low)*13
Via driver's seat heater relays*13:
Driver's seat-back heater*13,
Driver's seat cushion heater*13
Via front passenger's seat heater relays*13:
Front passenger's seat-back heater*13,
Front passenger's seat cushion heater*13
B15 10 A Driver's door lock actuator
B16 20 A Front passenger's power seat slide motor (Via front passenger's power seat adjustment switch)*10
B17 20 A Front passenger's power seat recline motor (Via front passenger's power seat adjustment switch)*10
B18 --- Not used
B19 7.5 A A/T gear position indicator,
Audio unit*5,
Audio-navigation unit*6,
Center display unit*12,
Center switch panel/interface dial*12,
Console accessory power socket relay,
HFL-ANC/active sound control microphone*11,
Telematics control unit*1*6
B20 7.5 A Not used
B21 7.5 A Not used
B22 7.5 A Automatic dimming inside mirror*7,
A/C compressor clutch relay,
Blower motor relay,
Climate control unit,
Driver's seat heater switch*13,
Fan control relay,
Front passenger's seat heater switch*13,
HVAC display unit*11,
Power mirror actuator (Via power mirror switch),
Power window master switch,
Radiator fan relay,
Rear window defogger relay
B23 --- Not used
B24 7.5 A EPS control unit, Steering angle sensor,
VSA modulator-control unit
B25 7.5 A Not used
B26 --- Not used
B27 20 A Console accessory power socket (Via console accessory power socket relay)
B28 --- Not used
B29 7.5 A Front passenger's airbag cutoff indicator*1,
Front passenger's weight sensor unit*1
B30 10 A Driver's door lock actuator
B31 10 A Electric steering lock*2,
Engine start/stop switch,
Keyless access/TPMS control unit (+B SMART),
Keyless access/TPMS control unit (SS1(+)) (Via engine start/stop switch)
B32 15 A Front passenger's door lock actuator,
Right rear door lock actuator
B33 15 A Left rear door lock actuator
B34 7.5 A Left front parking light/daytime running light,
Left front side marker light,
Left inner taillight,
Left license plate light,
Left taillight, Right front parking light/daytime running light,
Right front side marker light,
Right inner taillight,
Right license plate light,
Right taillight
B35 7.5 A ACC combination switch light*15,
A/T gear position indicator light,
Audio remote-HFT switch lights,
Center display unit*12,
Center switch panel/interface dial light*12,
Climate control unit,
Cruise control combination switch light*14,
Driver's seat heater switch light*13,
Front passenger's seat heater switch light*13,
Glove box light,
Hazard warning switch light,
Moonroof switch light,
Multi information switch light,
Paddle shifter lights,
Roof console module lights,
VSA off switch light
B36 --- Not used
B37 30 A Stereo amplifier*12
B38 10 A MICU (+B L H/L HI)
B39 10 A MICU (+B R H/L HI)
B40 --- Not used
B41 20 A Built into the under-dash fuse/relay box:
D/L DR unlock relay circuit,
D/L lock relay circuit,
D/L unlock relay circuit,
Trunk ACT relay circuit
No. B8 and No. B9 fuses in the under-dash fuse/relay box (Via D/L unlock relay circuit built into the under-dash fuse/relay box),
No. B15 fuse in the under-dash fuse/relay box (Via D/L DR unlock relay circuit built into the under-dash fuse/relay box),
No. B30, No. B32, and No. B33 fuses in the under-dash fuse/relay box (Via D/L lock relay circuit built into the under-dash fuse/relay box),
Trunk lid release actuator (Via trunk ACT relay circuit built into the under-dash fuse/relay box)
B42 20 A Power window master switch
B43 20 A Right rear power window motor (Via right rear power window switch)
B44 20 A Front passenger's power window switch
B45 20 A Left rear power window motor (Via left rear power window switch)
B46 --- Not used
*1: USA and Canada models
*2: Mexico models
*3: With blind spot information system/cross traffic monitor circuit
*4: With LKAS
*5: Without navigation
*6: With navigation
*7: With automatic dimming inside mirror
*8: Without DPMS
*9: With DPMS
*10: With front passenger's power seat
*11: Without touch screen
*12: With touch screen
*13: With seat heater
*14: Without ACC
*15: With ACC