DTC 19

Circuit Description:
When the ignition switch is turned ON, the 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 voltages at Driver Bag Low terminal 4 and Passenger Bag Low terminal 16 to detect short to B+ in the air bag assembly circuits.

DTC Will Set When:
Ignition 1 is within the normal operating voltage range. Once these conditions are met and the voltage at Passenger Bag Low is above a specified value, DTC 19 will set. This test is run once each ignition cycle and Continuous Monitoring.

Action Taken:
SDM turns ON the AIR BAG warning lamp and sets DTC 19 and also DTC 71.

DTC Will Clear When:
The SDM is replaced.




DTC Chart Test Description:

CAUTION: When DTC 19 has been set, it is necessary to replace the SDM. Setting DTC 19 and 25 or 51 or 53 will also cause DTC 71 to set. When a scan tool CLEAR CODES command is issued and the malfunction is no longer present, DTC 71 will remain current Ensure that the short to voltage condition is repaired prior to installing a replacement SDM to avoid damaging the SDM.

Number(s) below refer to step number(s) on the diagnostic chart:
2. This test determines whether the malfunction is in the SDM.
3. This test isolates the malfunction to one side of the passenger air bag assembly yellow 2-pin connector behind glove box compartment.
4. This test determines whether the malfunction is in CKT IB07-YEL/GRN.
5. This test determines whether the malfunction is in CKT IB08-YEL/RED.

Diagnostic Aids:
An intermittent condition is likely to be caused by a short to B+ in the passenger air bag assembly circuit. Inspect CKTs IB07-YEL/GRN and IB08-YEL/RED carefully for cutting or chafing. If the wiring pigtail of the passenger air bag assembly is damaged, the component must be replaced. A careful inspection of CKT IB07-YEL/GRN and IB08-YEL/RED, including the passenger air bag assembly pigtail is essential to ensure that the replacement SDM will not be damaged.