WARNING: This page is about a different car, the 2008 Acura TL and 2007 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.

Set the multiplex in B-CAN System Diagnosis Test mode 1 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS) ). While in Test Mode 1, the DTCs which 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 are normal. To scroll through the DTCs, press the SELECT/RESET button beside the gauge control module.

Fig 1: 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.

CONTROL UNIT NUMBER CHART

Control Unit	Control Unit I.D. Number
MICU	10
Relay control module	11
Door multiplex control unit	30
Gauge control module	50
Climate control unit	51
Display panel control unit	52
Combination switch control unit	70
Automatic lighting control unit	72
HandsFreeLink control unit	94
Power seat control unit	95
AcuraLink control unit	97

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Gauge Control Module DTC Display: Notes

Use the Manual With the Right Hardware

When to See a Mechanic

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