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

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, make sure the battery is fully charged. If the battery voltage is low, SRS indicator may 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.

Start the engine, and see if the malfunction indicator lamp (MIL) also stays on.
Does the MIL stay on longer than 30 seconds?

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

NO -Go to step 2.
Check for DTCs with the HDS (see HOW TO READ DTCS ).
Are any SRS DTCs indicated?

YES -Go to the SRS DTC TROUBLESHOOTING .

NO -Go to step 3.
Check for body electrical DTCs with the HDS (see WIRE COLOR CODES ).
Is DTC U0151 Indicated?

YES -Go to the DTC U0151 troubleshooting (see DTC U0151: GAUGE CONTROL MODULE LOST COMMUNICATION WITH SRS UNIT (SRS MESSAGE) ).

NO -Go to step 4.
Do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ).
Does the SRS indicator blink?

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 ).