LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Honda >> 2021 >> Pilot EX-L, AWD >> Repair and Diagnosis >> Quick Lookups >> Electrical Component Locations >> Electrical System - Testing & Troubleshooting >> Fuse To Components Index >> Fuse To Components Index (With Auto Idle Stop System) (2019 2020 2021) >> Auxiliary Under-Hood Fuse/Relay Box
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Auxiliary Under-Hood Fuse/Relay Box

Fig 1: Auxiliary Under-Hood Fuse/Relay Box Component Locations
GHH306374Courtesy of HONDA, U.S.A., INC.
Auxiliary Under-Hood Fuse/Relay Box Legend

Fuse Number Amps Component(s) or Circuit(s) Protected Feature
B1-1 60 A EPS control unit  
B1-2 60 A No. C14, No. C15, No. C17, No. C18, and No. C36 fuses in the under-dash fuse/relay box  
B1-3 60 A No. C1, No. C2, No. C3, No. C4, and No. C5 fuses in the under-dash fuse/relay box,

No. C11 and No. C13 fuse in the under-dash fuse/relay box (via power window relay),

Power window relay

 
B1-4 40 A Power tailgate control unit  
B1-5 30 A No. C6, No. C7, No. C8, No. C9, No. C10, and No. C24 fuses in the under-dash fuse/relay box (via IG1A relay)  
B1-6 30 A No. C28, No. C29, No. C30, No. C31, No. C32, and No. C39 fuses in the under-dash fuse/relay box (via IG1B relay)  
B1-7* 20 A i-VTM control unit, i-VTM relay *: AWD
Via i-VTM relay:

i-VTM control unit (4WD PWR), Rear differential pump motor

B1-8 - - - Not used  
B2 - - - Not used  
B3 - - - Not used  
B4 7.5 A 12 volt battery sensor (+B BMS)  
B5 20 A No. C26, No. C37, and No. C38 fuses in the under-dash fuse/relay box  
B6 20 A Power tailgate control unit (+B PTG CLOSER MTR)  
B7 20 A Console accessory power socket (via console accessory power socket relay)  
B8 20 A Cargo area accessory power socket (via cargo area accessory power socket relay)  
B9* 15 A Via heated windshield wiper area relay:

Heated windshield wiper area, Heated windshield wiper area switch indicator

*: With heated windshield wiper area
B10 10 A No. C22 and No. C40 fuses in the under-dash fuse/relay box (via ACC relay circuit (built into the under-dash fuse/relay box))  
Via IG2 relay circuit (built into the under dash fuse/relay box):

No. C21 and No. C23 fuses in the under-dash fuse/relay box, Keyless access/TPMS control unit (IG2-MAIN)

B11 - - - Not used  
B12 30 A No. B17 (via starter cut relay 1)  
Via starter cut relay 1 and starter cut relay 2:

Diode, Starter

B13 30 A DC-DC converter (+B DC/DC2)  
B14 30 A DC-DC converter (+B DC/DC1)  
B15 15 A TCM (+B TCU), SBW shifter control module (+B TCU)  
B16*1 20 A Second row seat heater control unit (+B RR H/SEAT)*2 (+B HEAT(15A))*3 (via second row seat heater relay) *1: With second row seat heater
*2: Second row seat (captain)
*3: Second row seat (bench)
B17 7.5 A PCM (STRLD)