DTC 25

CIRCUIT DESCRIPTION
During the first portion of the "Steering Column Resistance Test," the DERM grounds the "Force Low" output, terminal "A10," and monitors the voltage at the "Sense Low" input, terminal "A6." If the voltage at the "Sense Low" input, terminal "A6," is within a specific range of "Ignition 1" voltage, DTC 25 will set. DTC 25 is an indication of a short to B+ in the steering column circuit, CKT 347, CKT 348, CKT 349 or the "Force Low" CKT 688. Additionally, it can he set if the resistance of the 100 ohm resistor in the resistor module is too high. Test Conditions;

Tested once each ignition cycle during the "Steering Column Resistance Test" if: 1) No faults are detected during the "Turn-ON Tests"; 2) No faults are detected during the "Continuous Monitoring Tests" for one second; 3) No crank signal is present; 4) "Ignition 1" voltage is present at the DERM.

FAILURE CONDITIONS
DTC 25 will set if the voltage at the "Sense Low" input, terminal "A6," is within a specific range of "Ignition 1" voltage during the first portion of the "Steering Column Resistance Test."

ACTION TAKEN
The DERM illuminates the "INFL REST" indicator.

CONDITIONS TO CLEAR
DTC 25 will be cleared each time the ignition switch is turned to "OFF."

TEST DESCRIPTION:
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This test determines whether the fault is in the steering column or the deployment loop.
2. This test checks for a short to B+ in CKT 347.
3. This test checks for a short to B+ in CKT 341.
4. This test determines whether the steering column fault is due to a short to B+ in the inflator module wiring or in the SIR coil assembly wiring.
5. This test checks for a short to 13+ in CKT 340.
6. This test checks for a short to B+ in CKT 349.
7. This test checks for a short to B+ in CKT 348.
8. This test checks for a short to B+ in the "Force Low" CKT 688.
9. This test checks the integrity of the 100 ohm resistor and associated circuitry in the resistor module.