SRS indicator stays on, but no DTCs are stored, or cannot be read

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.

NOTE:

Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed (see COMPONENT REPLACEMENT/INSPECTION AFTER DEPLOYMENT ).
Before doing this troubleshooting procedure, check the battery is sufficiently charged (see BATTERY TEST ). If the battery voltage is low, SRS indicator stays on.
Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software (see SRS UNIT UPDATE ), and retest.

Turn the ignition switch to ON (II), and see if the malfunction indicator lamp (MIL) stays on.
Does the MIL stay on longer than 30 seconds?

YES -Go to the MIL Circuit Troubleshooting (see MIL CIRCUIT TROUBLESHOOTING ).

NO -Go to step 2.
Connect the HDS to the data link connector (DLC) (see GENERAL TROUBLESHOOTING INFORMATION ).
Make sure the HDS communicates with the vehicle and the SRS unit. If it does not communicate, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
Check for DTCs with the HDS (see GENERAL TROUBLESHOOTING INFORMATION ).
Are any SRS DTCs Indicated?

YES -Do the SRS DTC troubleshooting.

NO -Go to step 5.
Select Body Electrical status with the HDS.
Check for DTCs in the Gauge Menu with the HDS.
Is DTC B1187 indicated?

YES -Go to the DTC B1187 troubleshooting (see DTC B1182: GAUGE CONTROL MODULE LOST COMMUNICATION WITH DRIVER'S MPCS UNIT (DRLOCKSW MESSAGE) ).

NO -Go to step 7.
Do the gauge control module self diagnostic function (see SELF-DIAGNOSTIC FUNCTION ).
Does the SRS indicator come on?

YES -Faulty SRS unit; replace the SRS unit (see SRS UNIT REPLACEMENT ).

NO -Faulty gauge control module; replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).