Adaptive Cruise Control (ACC) Unit Inputs and Outputs

Fig 1: Identifying ACC Unit 20P Connector Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Terminal number	Wire color	Terminal name	Description	Signal
1	WHT	BRAKE DIAG	Detects brake light relay activation	ACC brake operated or brake pedal pressed: battery voltage
2	YEL	+ B TECH (10 A)	Detects ignition switch ON/OFF signals	Ignition switch ON (II): battery voltage Ignition switch OFF: about 0 V
3	GRN	SG	Sensor ground	Less than 0.2 V at all times
5	GRN	VCC	Provides sensor voltage	Ignition switch ON (II): about 5 V Ignition switch OFF: about 0 V
6	BLK	PRESS FR	Detects the brake fluid pressure signal of the right front brake caliper	Ignition switch ON (II): about 0.5-4.5 V Ignition switch OFF: about 0 V
7	PUR	F-CAN B H	F-CAN communication B (high) circuit	---
8	ORN	K-LINE	Sends and receives scan tool signals	---
9	BLK	GND	Ground circuit for the ACC system	Less than 0.2 V at all times
10	WHT	F-CAN A H	F-CAN communication A (high) circuit	---
11	BLK	GND	Ground circuit for the ACC system	Less than 0.2 V at all times
12	BLK	GND	Ground circuit for the ACC system	Less than 0.2 V at all times
13	WHT	+ B BACK UP (10 A)	Provides DTC memory voltage	Battery voltage
14	BLU	PRESS FL	Detects the brake fluid pressure signal of the left front brake caliper	Ignition switch ON (II): about 0.5-4.5 V Ignition switch OFF: about 0 V
15	GRY	WEN	Detects the write enable signal	---
16	YEL	BRAKE LAMP	Drives the brake light relay	Ignition switch ON (II): battery voltage Ignition switch OFF: about 0 V
17	RED	M/R TRX	Communicates with the millimeter wave radar	Ignition switch ON (II): battery voltage Ignition switch OFF: about 0 V
18	PNK	F-CAN B L	F-CAN communication B (low) circuit	---
20	RED	F-CAN A L	F-CAN communication A (low) circuit	---