Multi-information Display Unit Input Test

Remove the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ).
Disconnect the connector A (20P) and connector B (5P) from the display unit (C).

Fig 1: Disconnecting Connector A (20P) And Connector B (5P) From Display Unit
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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 4.
With the display unit still disconnected, make these input tests at the connector by back probing each terminal.
- 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 5.
  
  Fig 2: Making Input Tests At Connector By Back Probing Each Terminal (Display Unit Disconnected)
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
Reconnect the connector to the display unit, and perform the following input tests at the connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the display unit must be faulty; replace it.

DISPLAY UNIT (RECONNECTED)

Cavity	Wire	Test Condition	Test: Desired result	Possible cause if result is not obtained
A1	WHT/BLU	Under all conditions	Check for voltage to ground: There should be battery voltage.	Blown No. 54 (40 A) fuse in the under-hood fuse/relay box Blown No. 11 (10 A) fuse in the passenger's under-dash fuse/relay box An open in the wire
A2	WHT/RED	Ignition switch ON (II)	Check for voltage to ground: There should be battery voltage.	Blown No. 54 (40 A) fuse in the under-hood fuse/relay box Blown No. 9 (15 A) fuse in the passenger's under-dash fuse/relay box Blown No. 8 (7.5 A) fuse in the driver's under-dash fuse/relay box Faulty accessory power socket relay Poor ground (G651) An open in the wire
A8	YEL/RED^1 ORN^2	Ignition switch ON (II)	Check for voltage to ground: There should be battery voltage.	Blown No.5 (10A) ^1 or No.4 (7.5A)^2 fuse in the driver's under-dash fuse/relay box Faulty ignition switch An open in the wire
A5	BLK	Under all conditions	Check for voltage to ground: There should be less than 1 V.	Poor ground (G501) An open in the wire
A10	BLK	Under all conditions	Check for voltage to ground: There should be less than 1 V.	Poor ground (G502) An open in the wire
A4	LTGRN/WHT	Ignition switch ON (II)	Check for voltage to ground: There should be battery voltage.	Faulty gauge assembly An open in the wire
A14	YEL/BLU	Ignition switch ON (II) with the fuel gauge sending unit float at EMPTY position	Check for voltage to ground: There should be 5 V or more.	Faulty gauge assembly Faulty fuel gauge sending unit Poor ground (G501) An open in the wire A short to ground in the wire
A17	ORN/BLU	Ignition switch ON (ID	Check for voltage to ground: There should be about 4 V.	Faulty electrical compass unit An open in the wire A short to ground in the wire
A7	BLU/RED	Ignition switch ON (II)	Check for voltage to ground: There should be about 4 V.	Faulty electrical compass unit An open in the wire A short to ground in the wire
A16	GRN/WHT	Ignition switch ON (II)	Check for voltage to ground: There should be about 4 V.	Faulty electrical compass unit An open in the wire A short to ground in the wire
A6	WHT	Ignition switch ON (ID	Check for voltage to ground: There should be about 4 V.	Faulty electrical compass unit An open in the wire
B2	YEL/BLU	Ignition switch ON (ID	Check for voltage to ground: There should be about 5 V.	Faulty climate control unit A short in the wire An open in the wire
B3	GRN/ORN	Ignition switch ON (II)	Check for voltage to ground: There should be about 5 V.	Faulty climate control unit A short in the wire An open in the wire
B4	RED/GRN	Ignition switch ON (II)	Check for voltage to ground: There should be about 5 V.	Faulty climate control unit A short in the wire An open in the wire

Fig 3: Identifying Connector A (20P) And Connector B (5P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.