Test Procedure

WARNING: This page is about a different car, the 1996 Mercury Mystique and 1996 Ford Contour. However, it is still accessible from the selected car via links, so may be relevant.

Verify Condition

Turn ignition on. Check for fault codes. If Code 22 is flashing, go to step 2). If Code 22 is not flashing, check connectors, wiring, splices and crimps for an intermittent problem. DO NOT proceed with diagnostic test unless code is flashing. Failure to do so will result in unnecessary replacement of system components.

Check Voltage at Terminal No. 11

Deactivate air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM . Turn ignition switch to RUN position. Measure voltage between terminal No. 3 (Black/Red wire) and No. 11 (White/Blue wire) of diagnostic monitor. See Figure and Figure .

Compare voltage, measured in step 2) with vehicle's charging system voltage to determine if voltage at terminal No. 11 is within specification. See VOLTAGE SPECIFICATIONS (CODE 22) table. If voltage is high, go to step 4). If voltage is okay, replace diagnostic monitor.

VOLTAGE SPECIFICATIONS (CODE 22)

Voltage At Terminal No. 11	System Voltage
2.3	9.0
2.4	9.5
2.5	10.0
2.7	10.5
2.8	11.0
3.0	11.5
3.1	12.0
3.2	12.5
3.4	13.0
3.5	13.5
3.7	14.0
3.8	14.5
4.0	15.0
4.3	16.0
4.1	15.5

Check Wiring Harness For Short Circuits

Disconnect safing sensor. Measure resistance between terminal No. 15 and 11, and between terminal No. 23 and 11, of diagnostic monitor harness connector. If both resistance readings are infinite, go to step 5). If one or both readings are not infinite, locate and repair short circuit between Orange or Yellow/Black wire and Orange/Blue wire.

Check Safing Sensor

Measure resistance between terminals (Orange and Orange/Blue wire) of safing sensor. If resistance is infinite, locate and repair short in safing sensor harness. If resistance is not infinite, replace safing sensor.