Active damper system switch does not work (damper mode cannot be selected)

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

Turn the ignition switch to LOCK (0).
Check the No. 21 (7.5 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?

YES -Go to step 3.

NO -Replace the blown fuse.
Disconnect active damper system switch 5P connector (see ACTIVE DAMPER SYSTEM SWITCH TEST/REPLACEMENT ).
Turn the ignition switch to ON (II).
Measure the voltage between body ground and active damper system switch 5P connector terminal No. 2.

Fig 1: Measuring Voltage Between Body Ground And Active Damper System Switch 5P Connector Terminal No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 6.

NO -Repair an open in the wire between the under-dash fuse/relay box and the active damper system switch.
Turn the ignition switch to LOCK (0).
Check the active damper system switch (see ACTIVE DAMPER SYSTEM SWITCH TEST/REPLACEMENT ).
Is the active damper system switch OK?

YES -Go to step 8.

NO -Replace the active damper system switch (see ACTIVE DAMPER SYSTEM SWITCH TEST/REPLACEMENT ).
Disconnect gauge control module connector B (24P) (see GAUGE CONTROL MODULE REPLACEMENT ).
Check for continuity between gauge control module connector B (24P) terminal No. 19 and the active damper system switch 5P connector terminal No. 1.

Fig 2: Checking Continuity Between Gauge Control Module Connector B (24P) Terminal No. 19 And Active Damper System Switch 5P Connector Terminal No. 1
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 10.

NO -Repair an open in the wire between the gauge control module and the active damper system switch.
Turn the ignition switch to ON (II).
Measure the voltage between body ground and active damper system switch 5P connector terminal No. 1.

Fig 3: Measuring Voltage Between Body Ground And Active Damper System Switch 5P Connector Terminal No. 1
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there more than 0.1 V?

YES -Repair a short to power in the wire between the gauge control module and the active damper system switch.

NO -Go to step 12.
Turn the ignition switch to LOCK (0).
Disconnect gauge control module connector A (12P) (see GAUGE CONTROL MODULE REPLACEMENT ).
Check for continuity between gauge control module connector A (12P) terminal No. 3 and the active damper system switch 5P connector terminal No. 3.

Fig 4: Checking Continuity Between Gauge Control Module Connector A (12P) Terminal No. 3 And Active Damper System Switch 5P Connector Terminal No. 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 15.

NO -Repair an open in the wire between the gauge control module and the active damper system switch.
Reconnect all connectors.
Turn the ignition switch to ON (II).
Operate the active damper system switch, and check the mode selected light.
The light turns ON (OFF) to OFF (ON)?

YES -Check for loose terminals in the active damper control unit connectors A (20P)/B (14P). If necessary, substitute a known-good active damper control unit, then recheck. If it is OK, replace the original active damper control unit (see ACTIVE DAMPER CONTROL UNIT REPLACEMENT ).

NO -Check for loose terminals in the gauge control module connectors A (12P)/B (24P). If necessary, substitute a known-good gauge control module, then recheck. If it is OK, replace the original gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).