• | Perform the Diagnostic System Check - Vehicle prior to using the diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform turn-on test to diag-nose critical malfunctions within SDM itself.
Ignition voltage is between 9-16 volts.
The SDM does not implement diagnostic operation. In case of above, the wiring harness of SDM should be checked before replacing the SDM.
• | The SDM commands ON the AIR BAG warning lamp via serial data communications. |
• | The SDM disables all deployments. |
The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
• The I/P module • The SDM module • The I/P wiring harness connector • The SDM wiring harness connector
⇒ | If DTC B1620 was current replace the SDM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for SDM replacement, setup, and programming