B1620

DTC B1620

Circuit Description

When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform a turn-on test to diagnose critical malfunctions within the SDM itself.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1620 ECU Performance

Conditions for Running the DTC

Ignition voltage is within the normal operating voltage range.

Conditions for Setting the DTC

The SDM does not implement diagnostic operation. In case of the above, the wiring harness of the SDM should be inspected before replacing the SDM.

Action Taken When the DTC Sets

The SDM commands the AIR BAG indicator ON.

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.