SH-AWD Control Unit Inputs and Outputs

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

The SH-AWD control unit terminal voltages and the measuring conditions for the SH-AWD control system. Do the SH-AWD inputs and outputs test with the SH-AWD connectors connected.

Fig 1: Identifying SH-AWD Control Unit Connector Terminal Locations - A (20P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

SH-AWD CONTROL UNIT CONNECTOR TERMINAL REFERENCE - A(20P)

Terminal number	Wire color	Signal	Description	Measuring Conditions/Terminal Voltage
A1	BLK	LFH	Detects left search coil signal (positive)	With ignition switch ON (II): about 2.5 V
A3	BLU	RFH	Detects right search coil signal (positive)	With ignition switch ON (II): about 2.5 V
A5	LT BLU	K-LINE	Communication line SH-AWD control unit-to-DLC	With ignition switch ON (II): about 0 V or battery voltage
A7	GRN	IG1	Power supply for SH-AWD control unit	With ignition switch ON (II): battery voltage
A8	GRN	TOL	Detects differential fluid temperature sensor (negative)	With ignition switch ON (II): about 0.2 V to 4.7 V (Depending on ATF temperature)
A9	BLK	LG1	Unit ground	With ignition switch ON (II): about 0 V
A10	WHT	CANH	F-CAN communication signal	With ignition switch ON (II): about 2.5 V or 3.5 V
A11	RED	LFL	Detects left search coil signal (negative)	With ignition switch ON (II): about 2.5 V
A12	RED	RFL	Detects right search coil signal (negative)	With ignition switch ON (II): about 2.5 V
A17	ORN	FSR	Drives SH-AWD relay	With ignition switch ON (II): about 0 V or battery voltage
A18	WHT	TOH	Power supply for differential fluid temperature sensor	With ignition switch ON (II): about 4.7 V to 5 V
A19	GRY	WEN	Detects write enable signal	With ignition switch ON (II): about 0 V
A20	RED	CANL	F-CAN communication signal	With ignition switch ON (II): about 2.5 V or 1.5 V

The SH-AWD control unit terminal voltages and the measuring conditions for the SH-AWD control system. Do the SH-AWD inputs and outputs test with the SH-AWD connectors connected.

Fig 1: Identifying SH-AWD Control Unit Connector Terminal Locations - B(8P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

SH-AWD CONTROL UNIT CONNECTOR TERMINAL REFERENCE - B(8P)

Terminal number	Wire color	Signal	Description	Measuring Conditions/Terminal Voltage
B1	WHT	PWR	Power supply for SH-AWD actuator	With engine running: battery voltage
B2	BLK	PG	Actuator ground	With ignition switch ON (II): about 0 V
B3	BLK	LG2	Unit ground	With ignition switch ON (II): about 0 V
B4	RED	LCH	Drives left clutch electromagnetic coil (positive)	With clutch off: about 0 V With clutch on: battery voltage
B5	BLU	LCL	Drives left clutch electromagnetic coil (negative)	With ignition switch ON (II): about 0 V
B6	ORN	RCH	Drives right clutch electromagnetic coil (positive)	With clutch off: about 0 V With clutch on: battery voltage
B7	GRY	RCL	Drives right clutch electromagnetic coil (negative)	With ignition switch ON (II): about 0 V