Security Ultrasonic Sensor Input Test/Replacement
  1. Remove the roof console and disconnect the 3P connector (A) from the ultrasonic sensor (B).
  1. Inspect the connector and socket terminals to be sure they are all making good contact.
    • If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
    • If the terminals look OK, go to Step 3 .
  1. With the connector still disconnected, make these input tests at the connector.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, the ultrasonic sensor must be faulty, replace it.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    1
    WHT
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 15 (10 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    2
    BLU
    Disconnect the alarm control siren 6P connector
    Check for continuity between the No. 2 terminal and the alarm control siren 6P connector No. 4 terminal: There should be continuity.
    An open in the wire
    3
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • An open in the wire