Possible Causes

Code 22 will set if there is a short in wiring harness between circuits No. 938, 944, 944A, 944B, 944D and another wire. Code 22 will also set if clockspring is shorted between circuit No. 938 and horn or cruise control wiring. Code 22 will also set if safing sensor is shorted internally or vehicle charging system voltage is too high (more than 17 volts).

1. 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 until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
2. CHECK SYSTEM VOLTAGE  - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION  under DISABLING & ACTIVATING AIR BAG SYSTEM. Turn ignition on. Measure voltage between terminals No. 3 (Black/Green wire) and No. 13 (White/Green wire) of diagnostic monitor connector. Note this reading as system voltage.
3. CHECK FOR SHORT IN SAFING SENSOR CIRCUIT  - Using terminal No. 3 (Black/Green wire) as ground, measure voltage between terminals No. 3 and 11 (Green/White wire) of diagnostic monitor connector. Using this voltage reading and system voltage reading taken in step 2), 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 Or 12	System Voltage
   2.2	10.5
   2.3	11.0
   2.4	11.5
   2.5	12.0
   2.6	12.5
   2.7	13.0
   2.8	13.5
   2.9	14.0
   3.0	14.5
   3.1	15.0
   3.2	15.5
   3.3	16.0

4. CHECK SAFING SENSOR  - Turn ignition off. Disconnect diagnostic monitor. Disconnect rear safing sensor. Safing sensor is located behind center console, near throttle pedal. On all models, measure resistance between Red wire and Green/Black wire at safing sensor connector. If resistance is more than 10,000 ohms, go to step 5). If resistance is less than 10,000 ohms, replace safing sensor.
5. CHECK FOR SHORTED CLOCKSPRING  - Reconnect safing sensor. Disconnect clockspring connector from main wiring harness at base of steering column. Connect Air Bag Simulator (105-00010) to main wiring harness in place of clockspring connector. Turn ignition on. Using terminal No. 3 as ground, measure voltage between terminals No. 3 (Black/Green wire) and No. 11 (Green/White wire) of diagnostic monitor connector. Using this voltage reading and system voltage reading taken in step 2), determine if voltage at terminal No. 11 is within specification. See VOLTAGE SPECIFICATIONS (CODE 22) table. If voltage is high, go to step 6). If voltage is okay, replace clockspring.
6. CHECK FOR SHORT TO POWER  - Disconnect safing sensor connector. Disconnect clockspring connector. Measure voltage between ground and Red wire at safing sensor connector. If voltage is less than one volt, locate and repair short in circuit 944, 944A, 944B, 944D. If voltage is more than one volt, repair short in Red wire.