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Home >> Acura >> 2009 >> CSX Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Rear Differential) >> System Description >> SH-AWD Control Unit Inputs and Outputs
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SH-AWD Control Unit Inputs and Outputs

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. 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 inputs and outputs test are done with the SH-AWD connectors connected

Fig 1: Identifying SH-AWD Control Unit Inputs And Outputs Connector Terminal
G05991308Courtesy of AMERICAN HONDA MOTOR CO., INC.
TERMINAL VOLTAGE CHART

Terminal number Wire color Signal Description Measuring Conditions/Terminal Voltage
A1 BLK LFH Detects left search coil signal (positive) With ignition switch ON (II), or vehicle in ON mode about 2 5 V
A3 BLU RFH Detects right search coil signal (positive) With ignition switch ON (II), or vehicle in ON mode about 2 5 V
A5 LT BLU K-LINE Communication line SH-AWD control unit-to-DLC With ignition switch ON (II), or vehicle in ON mode about 0 V or battery voltage
A7 GRY IG1 Power supply for SH-AWD control unit With ignition switch ON (II), or vehicle in ON mode battery voltage
A8 GRN TOL Detects differential fluid temperature sensor (negative) With ignition switch ON (II), or vehicle in ON mode about 0 2 V to 4 7 V (Depending on ATF temperature)
A9 BLK LG1 Unit ground With ignition switch ON (II), or vehicle in ON mode about 0 V
A10 WHT CANH F-CAN communication signal With ignition switch ON (II), or vehicle in ON mode about 2 5 V to 4 0 V
A11 RED LFL Detects left search coil signal (negative) With ignition switch ON (II), or vehicle in ON mode about 2 5 V
A12 RED RFL Detects right search coil signal (negative) With ignition switch ON (II), or vehicle in ON mode about 2 5 V
A17 ORN FSR Drives SH-AWD relay With ignition switch ON (II), or vehicle in ON mode about 0V to battery voltage
A18 WHT TOH Power supply for differential fluid temperature sensor With ignition switch ON (II), or vehicle in ON mode about 4 7 V to 5 0 V
A19 RED WEN Detects write enable signal With ignition switch ON (II), or vehicle in ON mode about 0V
A20 BLK CANL F-CAN communication signal With ignition switch ON (II), or vehicle in ON mode about 2 5 V to 1 0 V

The SH-AWD control unit terminal voltages and the measuring conditions for the SH-AWD inputs and outputs test are done with the SH-AWD connectors connected

Fig 2: Identifying SH-AWD Control Unit Connector B (8P) Terminal Location
G05991309Courtesy of AMERICAN HONDA MOTOR CO., INC.
TERMINAL VOLTAGE CHART

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), or vehicle in ON mode about 0 V
B3 BLK LG2 Unit ground With ignition switch ON (II), or vehicle in ON mode about 0V
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), or vehicle in ON mode about 0V
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), or vehicle in ON mode about 0 V
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