DTC 56-26, 56-27: Undefined Data Received From the Gauge Control Module
- 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, review SRS Precautions and Procedures (see PRECAUTIONS AND PROCEDURES ), and General Troubleshooting Information (see DTC (DIAGNOSTIC TROUBLE CODES) ).
- 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.
- Check for any F-CAN and B-CAN communication DTCs with the HDS.
Are there any communication DTCs?
YES - Go to the appropriate DTC troubleshooting.
NO - Go to 2
- Clear the DTCs with the HDS (see HOW TO CLEAR DTCS ).
- Turn the ignition switch to ON (II), then wait for 10 seconds.
- Check for DTCs with the HDS (see HOW TO CLEAR DTCS ).
Is DTC 56-26 or 56-27 indicated?
YES - Faulty gauge control module. Do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ), and retest. If the gauge control module fails the self-diagnosis, replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ), then clear the DTC, and retest. If the DTC is still present, replace the SRS unit (see SRS UNIT REPLACEMENT ).
NO - Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures (see TROUBLESHOOTING INTERMITTENT FAILURES ). If another DTC is indicated, troubleshoot the DTC.