Driver's Unit

Remove the driver's multiplex control unit from the driver's under-dash fuse/relay box.
Inspect all 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 Drivers Under Dash Fuse Socket
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
  
  Fig 2: Identifying Drivers Under Dash Fuse Box Connector
  Courtesy of AMERICAN HONDA MOTOR CO., INC.

With the driver's multiplex control unit still disconnected, make these input tests at the driver's under-dash fuse/relay box socket.

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.

CONTROL UNIT INPUT TEST (DRIVER'S UNIT - DISCONNECTED - 1 OF 2)

Cavity	Wire	Test condition	Test: Desired result	Possible cause if result is not obtained
A12	Fuse/relay box socket	Under all conditions	Check for voltage to ground: There should be battery voltage.	Blown No. 13 (7.5 A) fuse in the passenger's under-dash fuse/relay box An open in the wire
A14	Fuse/relay box socket	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G401) An open in the wire

Remove the passenger's multiplex control unit from the passenger's under-dash fuse/relay box and connect fuse/relay box socket terminal A12 to battery voltage. This turns the power window relay on.

With the driver's multiplex control unit still disconnected, make these input tests at the driver's under-dash fuse/relay box socket.

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

If the input test proves OK, go to step 6.

CONTROL UNIT INPUT TEST (DRIVER'S UNIT - DISCONNECTED - 2 OF 2)

Cavity	Wire	Test condition	Test: Desired result	Possible cause if result is not obtained
A7	Fuse/relay box socket	With power window main switch ON, jump A7 to battery voltage	Check the left rear window motor operation: The window should go up.	Poor ground (G601, G651) Blown No. 7 (20 A) fuse in the passenger's under-dash fuse/relay box Faulty left rear window switch Faulty power window master switch Faulty power window motor An open in the wire
A19	Fuse/relay box socket	With power window main switch ON, jump A19 to battery voltage	Check the left rear window motor operation: The window should go down.	Poor ground (G601, G651) Blown No. 7 (20 A) fuse in the passenger's under-dash fuse/relay box Faulty left rear window switch Faulty power window master switch Faulty power window motor An open in the wire

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 DOOR UNIT .

CONTROL UNIT INPUT TEST (DRIVER'S UNIT - RECONNECTED)

Cavity	Wire	Test condition	Test: Desired result	Possible cause if result is not obtained
E3	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
E3	GRN/ORN	Driver's door closed	Check for voltage to ground: There should be 5 V or more.	Faulty driver's door switch Short to ground in the wire