YES -
Faulty SRS unit or poor connection at SRS unit connector A (39P) and the SRS unit. Check the connection between the connector and the SRS
unit. If the connection is OK, replace the SRS unit See: Relays and Modules/Relays and Modules - Restraints and Safety Systems/Air Bag Control
Module/Service and Repair/SRS Unit Replacement.?
NO -
Open between SRS unit connector A (39P) terminal No. 16 and gauge control module connector A (12P) terminal No. 6, and between SRS unit
connector A (39P) terminal No. 17 and gauge control module connector A (12P) terminal No. 12; replace the faulty harness, then clear the DTC.?
56-26
SRS DTC Troubleshooting: 56-26, 56-27
DTC 56-26, 56-27:
Undefined Data Received From the Gauge control Module
NOTE:
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures See: Body and Frame/Air Bag(s) Arming and
Disarming/Service and Repair, General Troubleshooting Information See: Restraints and Safety Systems/Air Bag Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes, and Battery Terminal Disconnection and Reconnection See: Starting and
Charging/Battery/Service and Repair/Procedures.
- 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: Restraints and Safety Systems/Air Bag Systems/Testing and Inspection/Programming and Relearning/SRS Unit Update,
and retest.
1. 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 step 2.
2. Clear the DTCs with the HDS.
3. Turn the ignition switch to ON (II), then wait for 10 seconds.
4. Check for DTCs with the HDS.
Is DTC 56-26 or 56-27 indicated?
YES -
Faulty gauge control module. Do the gauge control module self-diagnostic function See: Instrument Panel, Gauges and Warning
Indicators/Instrument Cluster / Carrier/Testing and Inspection/Initial Inspection and Diagnostic Overview, then clear the DTC. If the gauge control
module fails the self-diagnostic, replace the gauge control module, then clear the DTC. If the DTC is still present, replace the SRS unit See: Relays
and Modules/Relays and Modules - Restraints and Safety Systems/Air Bag Control Module/Service and Repair/SRS Unit Replacement.?
NO -
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.?
56-27
SRS DTC Troubleshooting: 56-26, 56-27
DTC 56-26, 56-27:
Undefined Data Received From the Gauge control Module
NOTE:
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures See: Body and Frame/Air Bag(s) Arming and
