TM 5-6350-275-24&P
Table 3-9. Sensors DS Maintenance Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. PASSIVE INFRARED MOTION SENSOR (CURTAIN, OMNI, VOLUME) FAILURE (Figure 3-11)
Step 1. Ensure alarm sensor area is free of personnel and any moving obstacles within detection area.
Step 2. Perform a walk test (per the SAIG) in detection area by moving toward sensor and monitoring LEDs.
The LED should be off if there is no movement within protected area and turn red when movement has been
detected.
If LED turns red during walk test, sensor unit is good.
If LED does not turn red or is not illuminated, go to step 3.
Step 3. Remove PIR sensor (1) front cover assembly (2) by removing four hex head screws (3). Set multimeter
to read vdc. Place negative (black) lead on terminal jack (5) and positive (red) lead on + terminal jack (6).
The meter should indicate approximately +12 v.
If voltage is correct, replace PIR sensor assembly (Para. 3-122).
If voltage is not present, go to step 4.
Step 4. Check continuity of wiring between the PIR sensor TB1, pins 5 and 6 and the RADC; TBK pins 3 and 4.
If continuity is present, go to troubleshooting steps for the RADC (Table 3-3).
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