Display does not dim or brighten with dimmer (without navigation): Notes

WARNING: This page is about a different car, the 2008 Acura CSX, 2007 Acura CSX, and 2006 Acura CSX. However, it is still accessible from the selected car via links, so may be relevant.

Turn the ignition switch ON (II).
Turn the combination light switch ON and OFF to see if the symptom can be duplicated.
Can you duplicate the problem?

YES -Go to step 3.

NO -Operation is normal.
Turn the combination light switch OFF.
Operate the illumination control dial.
Is it normal?

YES -Operation is normal.

NO -Go to step 5.
Disconnect and check audio unit connector A (17P) for loose or a poor connection.
Reconnect audio unit connector A (20P) and recheck the symptom; does the problem still appear?

YES -Go to step 6.

NO -Operation is normal.
Measure the voltage between audio unit connector A (17P) No. 1 and No. 10 terminals. Operate the dash brightness controller buttons to see if the voltage changes.

Fig 1: Measuring Voltage Between Audio Unit Connector A (17P) 1 And 10 Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Does the voltage change?

YES -Substitute a known-good audio unit, and recheck. If the symptom/indication goes away, replace the original audio unit. If symptom is still present, substitute a known-good center panel display and recheck. If the symptom/indication goes away, replace the original center panel display (see AUDIO UNIT REMOVAL/INSTALLATION ).

NO -Repair open in the wire between the under-dash fuse/relay box and the gauge control module.

Special Tools Required

Diagnostics CD 07AAZ-SDBA100