Driver's Unit

Remove the driver's multiplex control unit from the driver's under-dash fuse/relay box.
Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 3.
Fig 1: Identifying Driver's Under Dash Fuse Socket
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Identifying Driver's Multiplex Control Unit Connector B
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 3: Identifying Driver's Under Dash Fuse Box Connector E
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Identifying Driver's Under Dash Fuse Box Connector M
Courtesy of AMERICAN HONDA MOTOR CO., INC.
With the driver's multiplex control unit still disconnected, make these input tests at the connector and driver's under-dash fuse/relay box sockets.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK go to step 4.
Fig 5: Control Unit Input Test Chart (Driver's Unit)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Reconnect the driver's multiplex control unit to the driver's under-dash fuse/relay box, turn the ignition switch ON (II) to keep the system awake, and perform the following input tests at the appropriate connectors on the back of the driver's under-dash fuse/relay box.

For driver's under-dash fuse/relay box connector socket location (see DRIVER'S UNDER-DASH FUSE/RELAY BOX ).

If any test indicates a problem, find and correct the cause, then recheck the system.

If all the input tests prove OK, go to step 1 in PASSENGER'S UNIT .

CONTROL UNIT INPUT TEST (DRIVER'S UNIT)

Cavity

Wire

Test condition

Test: Desired result

Possible cause if result is not obtained

B6⁽¹⁾

YEL

Hood open

Check for voltage to ground:
There should be less than 1 V.

Poor ground (G201)
Faulty hood switch
An open in the wire

Hood closed

Check for voltage to ground:
There should be 5 V or more.

Faulty hood switch
A short to ground in the wire

B8⁽¹⁾

ORN

Tailgate open

Check for voltage to ground:
There should be less than 1 V.

Poor ground (G602)
Faulty tailgate latch switch
An open in the wire

Tailgate closed

Check for voltage to ground:
There should be 5 V or more.

Faulty tailgate latch switch
A short to ground in the wire

GRN/ORN

Driver's door open

Check for voltage to ground:
There should be less than 1 V.

Faulty driver's door switch
An open in the wire

Driver's door closed

Check for voltage to ground:
There should be 5 V or more.

Faulty driver's door switch
A short to ground in the wire

E10

LT GRN/BLK

Left rear door open

Check for voltage to ground:
There should be less than 1 V.

Faulty left rear door switch
An open in the wire

Left rear door closed

Check for voltage to ground:
There should be 5 V or more.

Faulty left rear door switch
A short to ground in the wire

BLU/WHT

Ignition key is in the ignition switch

Check for voltage to ground:
There should be less than 1 V.

Poor ground (G401)
Faulty ignition key switch
An open in the wire

Ignition key is out of the ignition switch

Check for voltage to ground:
There should be 5 V or more.

Faulty ignition key switch
A short to ground in the wire

⁽¹⁾	Driver's Multiplex Control Unit Connector B