TM 5-6350-275-24&P
Table 3-9. Sensors DS Maintenance Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8. PASSIVE ULTRASONIC SENSOR FAILURE (Figure 3-17)
Step 1. Remove front cover (2) and perform a walk test (per the SAIG) of PUS protected area while generating
an ultrasonic sound, such as jingling of keys. The PUS LED should illuminate.
If LED does not illuminate, go to step 3.
If LED illuminates, the PUS is good. Go to step 2.
Step 2. Check continuity and replace wiring between PUS and RADC as necessary.
If wiring is good, go to troubleshooting procedures for the RADC (Table 3-3).
Step 3. Set multimeter to read vdc and place negative lead on TB1 pin 2 and positive lead on TB1 pin 1. The
multimeter should read approximately 12 vdc.
If multimeter indication is correct, replace the PUS (Para. 3-123).
If voltage is not present, check continuity of wiring between the PUS TB1 pins 1 and 2 and RADC
Stargate TBK pins 3 and 4.
If continuity is present, the trouble is in the RADC.
If continuity is not present, replace wiring as necessary.
3-60