LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Honda >> 2021 >> Ridgeline RTL-E >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Audio / Visual System - Connector Views / Diagrams >> Connector View >> Audio-Navigation Unit Connector for Inputs and Outputs (2017 2018 2019)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Audio-Navigation Unit Connector for Inputs and Outputs (2017 2018 2019)

Connector Index
Audio-Navigation Unit Connector A (24P) (with stereo amplifier, with CD player unit)
Audio-Navigation Unit Connector A (24P) (with stereo amplifier, without CD player unit)
Audio-Navigation Unit Connector A (24P) (without stereo amplifier, with CD player unit)
Audio-Navigation Unit Connector A (24P) (without stereo amplifier, without CD player unit)
Audio-Navigation Unit Connector B (20P)
Audio-Navigation Unit Connector C (24P)
Audio-Navigation Unit Connector D (12P)
Audio-Navigation Unit Connector E (8P)
Audio-Navigation Unit Connector F (5P)
Audio-Navigation Unit Connector G (5P)
Audio-Navigation Unit Connector J (28P)
Audio-Navigation Unit Connector K (5P)
Audio-Navigation Unit Connector L (2P)
Audio-Navigation Unit Connector M (2P) (with XM radio)

AUDIO-NAVIGATION UNIT CONNECTOR A (24P) (female terminals) (with stereo amplifier, with CD player unit) 

GHH449498Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
A1 GND Ground for audio-navigation unit (G404)
A2 --- Not used
A3 +B RADIO +B power source
A4 --- Not used
A5 --- Not used
A6 --- Not used
A7 --- Not used
A8 --- Not used
A9 --- Not used
A10 --- Not used
A11 AUDIO REM GND Ground for audio remote switch and HFL-navigation voice control switch
A12 SCTY(4) Security signal from CD player unit
A13 K-LINE Communication signal
Cavity Terminal Name Description
A14 --- Not used
A15 FL SP PRE+ Outputs sound signal for left channel
A16 FL SP PRE- Outputs sound signal for left channel
A17 --- Not used
A18 --- Not used
A19 FR SP PRE+ Outputs sound signal for right channel
A20 FR SP PRE- Outputs sound signal for right channel
A21 RADIO SW+B Outputs signal for audio system related units switching on/off
A22 AUDIO REM Detects control signal from audio remote switch
A23 AUDIO INFO SW Detects control signal from audio remote switch
A24 ACC ACCESSORY power source

AUDIO-NAVIGATION UNIT CONNECTOR A (24P) (female terminals) (with stereo amplifier, without CD player unit) 

GHH449499Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
A1 GND Ground for audio-navigation unit (G404)
A2 --- Not used
A3 +B RADIO +B power source
A4 --- Not used
A5 --- Not used
A6 --- Not used
A7 --- Not used
A8 --- Not used
A9 --- Not used
A10 --- Not used
A11 AUDIO REM GND Ground for audio remote switch and HFL-navigation voice control switch
A12 SCTY(1) Security signal from MICU
A13 K-LINE Communication signal
A14 --- Not used
A15 FL SP PRE+ Outputs sound signal for left channel
A16 FL SP PRE- Outputs sound signal for left channel
A17 --- Not used
A18 --- Not used
Cavity Terminal Name Description
A19 FR SP PRE+ Outputs sound signal for right channel
A20 FR SP PRE- Outputs sound signal for right channel
A21 RADIO SW+B Outputs signal for audio system related units switching on/off
A22 AUDIO REM Detects control signal from audio remote switch
A23 AUDIO INFO SW Detects control signal from audio remote switch
A24 ACC ACCESSORY power source

AUDIO-NAVIGATION UNIT CONNECTOR A (24P) (female terminals) (without stereo amplifier, with CD player unit) 

GHH449500Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
A1 GND Ground for audio-navigation unit (G404)
A2 --- Not used
A3 +B RADIO +B power source
A4 --- Not used
A5 RL SP+ Outputs sound signal for left rear door speaker
A6 RL SP- Outputs sound signal for left rear door speaker
A7 --- Not used
A8 --- Not used
A9 RR SP+ Outputs sound signal for right rear door speaker
A10 RR SP- Outputs sound signal for right rear door speaker
A11 AUDIO REM GND Ground for audio remote switch and HFL-navigation voice control switch
A12 SCTY(4) Security signal from CD player unit
A13 K-LINE Communication signal
A14 --- Not used
A15 FL SP+ Outputs sound signal for driver's door speaker and left tweeter
A16 FL SP- Outputs sound signal for driver's door speaker and left tweeter
A17 --- Not used
A18 --- Not used
A19 FR SP+ Outputs sound signal for front passenger's door speaker and right tweeter
A20 FR SP- Outputs sound signal for front passenger's door speaker and right tweeter
A21 RADIO SW+B Outputs signal for audio system related units switching on/off
Cavity Terminal Name Description
A22 AUDIO REM Detects control signal from audio remote switch
A23 AUDIO INFO SW Detects control signal from audio remote switch
A24 ACC ACCESSORY power source

AUDIO-NAVIGATION UNIT CONNECTOR A (24P) (female terminals) (without stereo amplifier, without CD player unit) 

GHH449501Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
A1 GND Ground for audio-navigation unit (G404)
A2 --- Not used
A3 +B RADIO +B power source
A4 --- Not used
A5 RL SP+ Outputs sound signal for left rear door speaker
A6 RL SP- Outputs sound signal for left rear door speaker
A7 --- Not used
A8 --- Not used
A9 RR SP+ Outputs sound signal for right rear door speaker
A10 RR SP- Outputs sound signal for right rear door speaker
A11 AUDIO REM GND Ground for audio remote switch and HFL-navigation voice control switch
A12 SCTY(1) Security signal from MICU
A13 K-LINE Communication signal
A14 --- Not used
A15 FL SP+ Outputs sound signal for driver's door speaker and left tweeter
A16 FL SP- Outputs sound signal for driver's door speaker and left tweeter
A17 --- Not used
A18 --- Not used
A19 FR SP+ Outputs sound signal for front passenger's door speaker and right tweeter
A20 FR SP- Outputs sound signal for front passenger's door speaker and right tweeter
A21 RADIO SW+B Outputs signal for audio system related units switching on/off
A22 AUDIO REM Detects control signal from audio remote switch
A23 AUDIO INFO SW Detects control signal from audio remote switch
A24 ACC ACCESSORY power source

AUDIO-NAVIGATION UNIT CONNECTOR B (20P) (female terminals) 

GHH449502Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
B1 --- Not used
B2 --- Not used
B3 B-CAN_L Communication signal
B4 --- Not used
B5 --- Not used
B6 --- Not used
B7 AUX SH Shield for terminals No. 17, No. 18, and No. 19
B8 --- Not used
B9 AUX DET GND Ground for auxiliary jack assembly
B10 --- Not used
B11 ATP-P Detects shift position signal (P)
B12 HFT/NAVI REM Detects control signal from HFL-navigation voice control switch
B13 B-CAN_H Communication signal
B14 --- Not used
B15 --- Not used
B16 --- Not used
B17 AUX RCH Inputs sound signal from auxiliary jack assembly
B18 AUX LCH Inputs sound signal from auxiliary jack assembly
B19 AUX SIG GND Ground for sound signal from auxiliary jack assembly
B20 AUX DET Detects connection signal for auxiliary jack assembly

AUDIO-NAVIGATION UNIT CONNECTOR C (24P) (female terminals) 

GHH449503Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
C1 F-CAN_L Communication signal
C2 RR CAM SH Shield for terminals No. 3 and No. 15
C3 RR CAM VID GND Ground for rearview camera
C4 --- Not used
C5 BIT 0 Mode select signal for rearview camera
C6* LWC SW LaneWatch on/off signal from LaneWatch switch
C7 BACK LT Detects reverse signal of select lever from reverse relay circuit
C8* LWC CAM V GND Ground for LaneWatch camera
C9* LWC CAM GND Shield for terminals No. 8, No. 20, No. 21, No. 22, and No. 23
C10 --- Not used
C11 --- Not used
C12 --- Not used
C13 F-CAN_H Communication signal
C14 VSP OUT Detects vehicle speed pulse from PCM
C15 RR CAM VID Video signal for rearview camera
C16 RR CAM VCC Power source for rearview camera
C17 IG1 REM IG1 power source
C18 BIT 1 Mode select signal for rearview camera
C19 --- Not used
C20* LWC CAM V Video signal for LaneWatch camera
C21* LWC CAM +B Power source for LaneWatch camera
C22* UNIT TO LWC Communication signal for LaneWatch camera
C23* LWC TO UNIT Communication signal for LaneWatch camera
C24 --- Not used

*: With LaneWatch

AUDIO-NAVIGATION UNIT CONNECTOR D (12P) (female terminals) 

GHH449504Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
D1 GA BUS- GA-Net bus communication signal
D2 GA BUS SH Shield for terminals No. 1 and No. 7
D3 GA AUDIO L- Inputs sound signal from GA-Net related units
D4 GA AUDIO R- Inputs sound signal from GA-Net related units
D5 GA AUDIO SH Shield for terminals No. 3, No. 4, No. 9, and No. 10
D6 GND Ground for GA-Net related units
D7 GA BUS+ GA-Net bus communication signal
D8 GA SYS ON Output signal for GA-Net related units switching on/off
D9 GA AUDIO L+ Inputs sound signal from GA-Net related units
D10 GA AUDIO R+ Inputs sound signal from GA-Net related units
D11 --- Not used
D12 GA +B Outputs power source for GA-Net related units

AUDIO-NAVIGATION UNIT CONNECTOR E (8P) (female terminals) 

GHH449505Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
E1 --- Not used
E2 --- Not used
E3 --- Not used
E4 --- Not used
E5* SUBW+ Outputs sound signal for subwoofer and ANC/active sound control unit

*: Without stereo amplifier

Cavity Terminal Name Description
E6 --- Not used
E7* SUBW- Outputs sound signal for subwoofer and ANC/active sound control unit
E8 --- Not used

*: Without stereo amplifier

AUDIO-NAVIGATION UNIT CONNECTOR F (5P) (female terminals) 

GHH449506Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
F1 USB GND Ground for communication signal
F2 USB VBUS Outputs power source for USB port A
F3 USB DATA+ Communication signal
F4 USB DATA- Communication signal
F5 USB SH Shield for terminals No. 1, No. 2, No. 3, and No. 4

AUDIO-NAVIGATION UNIT CONNECTOR G (5P) (female terminals) 

GHH449507Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
G1 USB GND Ground for communication signal
G2 USB VBUS Outputs power source for USB port B
G3 USB DATA+ Communication signal
G4 USB DATA- Communication signal
G5 USB SH Shield for terminals No. 1, No. 2, No. 3, and No. 4

AUDIO-NAVIGATION UNIT CONNECTOR J (28P) (female terminals) 

GHH449508Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
J1* 2 ANC R+ Inputs noise cancelling signal from ANC/active sound control unit
J2* 2 ANC R- Inputs noise cancelling signal from ANC/active sound control unit
J3 ANC CK2 Outputs ANC test signal
J4* 1 RS485+ Communication signal to stereo amplifier
J5* 1 RS485- Communication signal to stereo amplifier
J6* 1 RS485 SH Shield for terminals No. 4 and No. 5
J7 --- Not used
J8 --- Not used
J9 --- Not used
J10 MIC GND Inputs microphone signal
J11 MIC SIG+ Inputs microphone signal
J12 MIC SH Shield for terminals No. 10 and No. 11
J13 --- Not used
J14 --- Not used
J15 --- Not used
J16 --- Not used
J17* 2 ANC F+ Inputs noise cancelling signal from ANC/active sound control unit
J18* 2 ANC F- Inputs noise cancelling signal from ANC/active sound control unit
J19* 1 AUX NAVI Outputs sound signal for voice guidance and Voice Recognition (VR) prompts
J20* 1 AUX BEEP Outputs sound signal for beep
J21* 1 AUX NAVI GND Basis ground for terminals No. 19 and No. 20
J22* 1 AUX NAVI SH Shield for terminals No. 19, No. 20, and No. 21
J23 --- Not used
J24 --- Not used
J25 MIC PWR Power source for front HFL-navigation sound control microphone
J26 --- Not used
J27 HFT MUTE HFL mute signal
J28 --- Not used

*1: With stereo amplifier

*2: Without stereo amplifier

AUDIO-NAVIGATION UNIT CONNECTOR K (5P) (female terminals) 

GHH449509Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
K1 --- Not used
K2 --- Not used
K3 TRAFFIC Inputs traffic signal
K4 --- Not used
K5 SH (TRAFFIC) Shield for terminals No. 3

AUDIO-NAVIGATION UNIT CONNECTOR L (2P) (female terminals) 

GHH449510Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
L1 5V +SIG Inputs GPS signal
L2 GND Shield for terminal No. 1

AUDIO-NAVIGATION UNIT CONNECTOR M (2P) (female terminals) (with XM radio) 

GHH449511Courtesy of HONDA, U.S.A., INC.
Cavity Terminal Name Description
M1 SAT/TERM Inputs XM signal
M2 SH (SAT/TERM) Shield for terminal No. 1