Control Unit Input Tests
Before performing control unit input tests, ensure multiplex control units are operating properly. See MULTIPLEX CONTROL SYSTEMS article in the ACCESSORIES/SAFETY EQUIPMENT section. See WIRING DIAGRAMS
. Check connectors for open, loose or disconnected terminals. If terminals are bent, loose or corroded, repair as necessary and recheck system. See WIRING DIAGRAMS
. If control unit input tests are okay, replace tested control unit and recheck system. See Fig 1
-Fig 6
. See appropriate MULTIPLEX CONTROL UNIT CONNECTOR TERMINAL IDENTIFICATION table.
Courtesy of AMERICA HONDA MOTOR CO., INC. DOOR MULTIPLEX CONTROL UNIT CONNECTOR TERMINAL IDENTIFICATION
| Terminal No. (Wire Color) |
Circuit Identification |
| 1 (WHT/YEL) |
Battery Voltage Input |
| 2 (GRN/WHT) |
Power Window Relay Input |
| 3 (RED/BLK) |
Master Switch Light - Power |
| 4 (BLU) |
Window Motor Pulse Input |
| 5 (GRN/BLU) |
Door Switch Input |
| 6 (GRN/WHT) |
Key Cylinder Switch UNLOCK |
| 7 (BLU/WHT) |
Knob Switch LOCK |
| 8 (GRN/RED) |
Lock Switch UNLOCK |
| 10 (RED/BLU) |
Window Motor Control |
| 11 (RED/YEL) |
Window Motor Control |
| 12 (BLK) |
Ground |
| 13 (RED) |
Master Switch Light GROUND |
| 14 (BLU/BLK) |
Trunk Opener Switch Input |
| 15 (BRN/YEL) |
Door "D" Line |
| 16 (GRN/RED) |
Key Cylinder Switch LOCK |
| 17 (GRN/BLK) |
Knob Switch UNLOCK |
| 18 (GRN/WHT) |
Lock Switch LOCK |
| 19 (BLK) |
Ground |
| 20 (GRY/BLK) |
Main Switch Output |
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Courtesy of AMERICA HONDA MOTOR CO., INC. PASSENGER'S MULTIPLEX CONTROL UNIT CONNECTOR TERMINAL IDENTIFICATION
| Terminal (Wire Color) |
Circuit Identification |
| Gray 26-Pin Connector |
| A1 (WHT/YEL) |
Battery Input |
| A2 (BLK) |
Ground |
| A3 (BLK) |
Ground |
| A4 (BLK/RED) |
Front Passenger Power Window Control |
| A5 (YEL) |
Trunk Opener Main Switch Input |
| A6 (YEL/BLU) |
Rear Defogger ON Input |
| A7 (GRN/ORG) |
Hood Switch Input |
| A8 (BLU) |
Audio Unit Input |
| A9 (RED/YEL) |
A-D Line |
| A10 (PNK/BLU) |
Wake-Up |
| A12 (WHT) |
Battery Input |
| A13 (WHT/RED) |
Driver's/Left Rear Door Lock Control |
| A14 (YEL) |
Ignition Input |
| A15 (RED) |
Dim Control |
| A16 (BLK) |
Ground |
| A17 (BLU/BLK) |
Front Passenger Power Window Control |
| A18 (YEL/RED) |
Engine Oil Pressure Input |
| A19 (YEL/GRN) |
Rear Defogger ON Output |
| A20 (WHT/BLU) |
Engine Running Input |
| A21 (BLU/RED) |
Front Passenger Knob Switch Input |
| A22 (BRN/WHT) |
D-A Line |
| A23 (GRN/RED) |
Front Passenger Door Switch Input |
| A25 (LT GRN/BLK) |
Driver's Door Lock Control |
| A26 (YEL/RED) |
Left Rear Door Lock Control |
| Gray 22-Pin Connector |
| B1 (WHT/RED) |
Front Passenger/Right Rear Door Lock Control |
| B3 (PNK/BLU) |
Trunk |
| B4 (RED/WHT) |
Lock |
| B5 (BLU/GRN) |
Trunk Latch Switch Input |
| B6 (YEL/GRN) |
Right Rear Power Window Control |
| B7 (RED/BLU) |
Right Rear Door Knob Switch Input |
| B8 (GRN/WHT) |
Front Passenger Door Lock Switch Input UNLOCK |
| B9 (GRN/RED) |
Front Passenger Door Lock Cylinder Switch Input UNLOCK |
| B10 (BLU/RED) |
Interior Light Control |
| B11 (WHT/BLK) |
Trunk Opener Solenoid Control |
| B12 (YEL/RED) |
Front Passenger/Right Rear Door Lock Control |
| B14 (YEL/BLK) |
PCM "C" |
| B15 (GRN) |
Unlock |
| B17 (YEL) |
Right Rear Power Window Control |
| B18 (GRN/ORG) |
Right Rear Door Switch Input |
| B19 (GRN/RED) |
Front Passenger Door Lock Switch Input LOCK |
| B20 (GRN/WHT) |
Front Passenger Door Lock Cylinder Switch Input LOCK |
| B21 (LT GRN/BLK) |
Courtesy Light Control |
| B22 (PNK/BLK) |
Multiplex Check Connector Input |
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Courtesy of AMERICA HONDA MOTOR CO., INC. DRIVER'S MULTIPLEX CONTROL UNIT CONNECTOR TERMINAL IDENTIFICATION
| Terminal (Wire Color) |
Circuit Identification |
| 14-Pin Connector |
| A2 |
Wiper Park Position Input |
| A4 |
Vehicle Speed Sensor (VSS) Input |
| A7 |
Battery Input |
| A8 |
Ground |
| A10 |
Multiplex Control Inspection Connector Input |
| A11 |
Power Window Relay Control |
| A13 |
Ignition Input |
| Gray 26-Pin Connector |
| B2 (BLK/RED) |
Key Interlock Switch Input |
| B4 (RED/GRN) |
Lights-On Input/Taillight Relay Control |
| B5 (GRN) |
Intermittent ON Input |
| B6 (GRN/YEL) |
Intermittent Dwell Timer Input |
| B7 (WHT) |
Security Indicator Control |
| B8 (ORG) |
Horn Control |
| B9 (BRN/WHT) |
D-A Line |
| B10 (PNK/BLU) |
Wake-Up |
| B12 (GRN/WHT) |
Brake Switch Input |
| B13 (WHT/RED) |
Key Interlock Solenoid Control |
| B15 (PNK) |
Keyless Buzzer Control |
| B16 (BLU/RED) |
Headlight Relay Control |
| B18 (GRN/RED) |
Intermittent Wiper Control |
| B19 (GRN/WHT) |
Intermittent Dwell Timer Input |
| B20 (BLK/WHT) |
Wiper ON Input |
| B22 (RED/YEL) |
A-D Line |
| B23 (BRN/YEL) |
Door D-Line |
| B25 (WHT/BLK) |
Ignition Key Light Control |
| B26 (WHT/GRN) |
Shift Lock Circuit Input |
| Gray 16-Pin Connector |
| C2 (BLK/BLU) |
Park Position Switch |
| C3 (LT GRN) |
Instrument Cluster Illumination Brightness Control |
| C5 (WHT/BLK) |
Parking Pin Switch Input |
| C6 (YEL/GRN) |
Left Rear Power Window Control |
| C7 (GRY) |
Left Rear Lock Knob Switch Input |
| C8 (GRN/ORG) |
Trunk Key Cylinder Switch Input |
| C9 (BLU/WHT) |
Ignition Key Switch Input |
| C10 (GRN) |
Shift Lock Solenoid Control |
| C11 (BLU/BLK) |
Instrument Cluster Illumination Brightness Controller |
| C13 (RED/BLU) |
Driver's Seat Belt Switch Input |
| C14 (YEL) |
Left Rear Power Window Control |
| C15 (GRN/YEL) |
Left Rear Door Switch Input |
| C16 (GRN/WHT) |
Parking Brake Switch Input |
| C16 (GRN/RED) |
Parking Brake Switch Input |
Courtesy of AMERICAN HONDA MOTOR CO., INC.