Display does not dim or brighten with dimmer (without navigation)
- Check the vehicle battery condition first (see 12 VOLT BATTERY TEST ).
- Check the connectors for poor connections or loose terminals.
- Turn the ignition switch to ON (II).
- Turn the combination light switch on and off to see if the symptom can be duplicated.
Can you duplicate the symptom?
YES -Go to step 3.
NO -Operation is normal.
- Turn the combination light switch off.
- Operate the illumination control dial.
Does the illumination control dial function normally?
YES -Operation is normal.
NO -Go to step 5.
- Turn the ignition switch to LOCK (0).
- Remove the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION
).NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD player's load mechanism.
- Disconnect and check audio unit connector A (24P) for loose or a poor connection reconnect audio unit connector A (24P), and recheck the symptom.
Does the symptom still appear?
YES -Go to step 8.
NO -Operation is normal.
- Turn the ignition switch to ON (II).
- Measure the voltage between audio unit connector A (24P) terminals No. 2 and No. 4. Operate the dashlights brightness controller buttons to see if the voltage changes.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Does the voltage change?
YES -Substitute a known-good center panel (see step 9 ), and recheck. If the symptom/indication goes away, replace the original center panel (see step 9 ). If symptom is still present, substitute a known-good audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ).
NO -Check for an open in the wire(s) between the under-dash fuse/relay box and the gauge control module. If the wires are OK, substitute a known-good gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ), and recheck. If the symptom goes away, replace the original gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).