DTC 24

DTC 24 Driver Deployment Loop Short To Ground

Circuit Description:




When the ignition switch is turned "ON", the Sensing and Diagnostic Module (SDM) will perform tests to diagnose critical malfunctions within itself. Upon passing these tests, "ignition 1", and deployment loop voltages are measured to ensure they are within their respective normal voltage ranges.
The SDM monitors the voltage at "Driver Bag Low" terminal "4" and "Passenger Bag Low" terminal "16" to detect short to ground in the air bag assembly circuits.

DTC Will Set When:
Neither of the two air bag assemblies is open.
"Ignition 1" is within the normal operating voltage range. This test is run once each ignition cycle and "Continuous Monitoring". Once these conditions are met and the voltage at "Driver Bag Low" is below a specified value, DTC 24 will set.

Action Taken:
SDM turns "ON" the "AIR BAG" warning lamp and sets a diagnostic trouble code.

DTC Will Clear When:
The malfunction is no longer occurring and the ignition is turned "OFF."

DTC Chart Test Description:

Number(s) below refer to step number(s) on the diagnostic chart:
2. This test determines whether the SDM is malfunctioning
3. This test isolates the malfunction to one side of the Supplemental Restraint System (SRS) coil assembly yellow 2-pin connector at the base of the steering column.
4. This test determines whether the malfunction is in Circuit(CKT) IB05-YELLOW.
5. This test determines whether the malfunction is in CKT IB06-YELLOW/BLACK.
6. This test determines whether the malfunction is in the SRS coil assembly or the driver air bag assembly.

Diagnostic Aids:

An intermittent condition is likely to be caused by a short to ground in the driver air bag assembly circuit. Inspect CKTs IB05-YELLOW and IB06-YELLOW/BLACK carefully for cutting or chafing.

Step 1 - 7:

DTC 24 Driver Deployment Loop Short To Ground