Adaptive Cruise Control (ACC) System Inputs and Outputs

Fig 1: Identifying ACC Unit 20P Connector

Courtesy of AMERICAN HONDA MOTOR CO., INC.

TERMINAL DESCRIPTION CHART

Terminal number	Wire color	Terminal sign	Terminal name	Description	Signal
1	RED	BRK DIAG	Brake diagnosis	Detects ACC relay	ACC system brake operated or brake pedal pressed: battery voltage
2	BLU	IG1	Ignition signal	Detects ignition signal	Ignition switch ON (II): battery voltage Ignition switch OFF: about 0 V
3	GRN	SG	Sensor ground	Sensor ground	-
5	RED	VCC	Voltage constant current	Provides sensor voltage	Ignition switch ON (II): about 5 V Ignition switch OFF: about 0 V
6	BLU	PRESS FR	Pressure front right	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
8	BLU	K-LINE	Data link	Sends and receives scan tool signal	-
9	BLK	PG	Power ground	Ground circuit for the ACC system	-
10	WHT	CANH	CAN High line	F-CAN communication (high) circuit	-
11	BLK	LG1	Logic ground 1	Ground circuit for the ACC system	-
12	BLK	LG2	Logic ground 2	Ground circuit for the ACC system	-
13	WHT	VBU	Back-up voltage	Provides DTC memory voltage	Battery voltage
14	PNK	PRESS FL	Pressure front left	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
16	BLU	BRK LAMP	Brake light	Drives the ACC relay	Ignition switch ON (II): battery voltage Ignition switch OFF: about 0 V
17	WHT	IWR TRX	Millimeter wave radar data link	Communicates with the millimeter wave radar unit	Ignition switch ON (II): battery voltage Ignition switch OFF: about 0 V
20	BLK	CANL	CAN Low line	F-CAN communication (low) circuit	-