How to display DTCs on the gauge control module

Turn the ignition switch ON (II).
Connect the MPCS service connector to the MCIC socket in the driver's under-dash fuse/relay box.

Wait 5 seconds, then watch the multi-information display.

While in Test Mode 1, the DTCs that have been detected and stored individually by various B-CAN (body-controller area network) units, will be shown one by one on the multi-information display when the communication between the multiplex integrated control unit (MICU) and the gauge control module is normal. To scroll through the DTCs, press the select/reset switch on the steering wheel.

Fig 1: Identifying Gauge Control Module DTC Display

Courtesy of AMERICAN HONDA MOTOR CO., INC.

The unit that has stored the code can be identified by the number shown on the multi-information display (MID).

CONTROL UNIT REFERENCE

UNIT	Code (Control Unit I.D. Number)
MICU	10
Relay control module	11
Driver's MPCS unit	30
Gauge control module	50
Climate control unit	51
Combination switch control unit	70
Adaptive front lighting control unit	73
Keyless access control unit	90
OnStar control unit ('05-06 models)	91
HandsFreeLink control unit	94
Power seat control unit	95
AcuraLink control unit (XM receiver)	97