Gauge Control Module Input Test

Remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
Disconnect the 18P connector from the gauge control module.
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.
Fig 1: Identifying 18P Gauge Control Module Connector B Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Reconnect the connector, and make these input tests at the connector.

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.

GAUGE CONTROL MODULE INPUT TEST - REFERENCE DATA

Cavity	Wire	Test Condition	Test: Desired result	Possible cause if result is not obtained
B17	WHT/RED	Under all conditions	Check for voltage to ground: There should be battery voltage.	Blown No. 7 (7.5 A) fuse in the under-dash fuse/relay box An open in the wire
B18	YEL	Ignition switch ON (II)	Check for voltage to ground: There should be battery voltage.	Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box An open in the wire
B1	BLK	Under all conditions	Check for voltage to ground: There should be less than 1 V.	Poor ground (G501) An open in the wire
B10	BLK	Under all conditions	Check for voltage to ground: There should be less than 1 V.	Poor ground (G501) An open in the wire

Disconnect the 18P connector from the gauge control module, and make these input tests at the connector.

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, replace the gauge control module.

GAUGE CONTROL MODULE INPUT TEST - REFERENCE DATA

Cavity	Wire	Test Condition	Test: Desired result	Possible cause if result is not obtained
B11	BRN/YEL	Under all conditions	Check for continuity between the B11 terminal and under-dash fuse/relay box connector N (45P) No. 28 terminal: There should be continuity.	An open in the wire