Parking and Back-up Sensor Control Unit Test/Replacement
  1. Remove the right rear side trim panel.
  1. Disconnect the 16P connector (A) from the parking sensor control unit (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 4 .
  1. With the connectors still disconnected, do these input tests at the following connector.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, go to Step 5 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    9
    BLK
    Under all conditions
    Check for continuity terminals to body ground:There should be continuity.
    • Poor ground (G603: LHD or G652: RHD)
    • An open in the wire
    15
    BLK
    16
    BLK
    1
    LT BLU
    Ignition switch ON (II)
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 10 (7.5 A) fuse in the under-dash fuse/relay box
    • Faulty MICU
    • An open in the wire
    8
    YEL
    Ignition switch ON (II) and parking and back-up sensor switch ON
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 10 (7.5 A) fuse in the under-dash fuse/relay box
    • Faulty switch
    • An open in the wire
    7
    PNK
    Under all conditions
    Check for continuity between terminal No. 7 and under-dash fuse/relay box connector Q (16P) terminal No. 6: There should be continuity.
    An open in the wire
    Check for continuity between terminal No. 7 and body ground: There should be no continuity.
    A short to ground in the wire
    12
    WHT
    Under all conditions
    Check for continuity between terminal No. 12 and right rear corner parking sensor terminal No. 2: There should be continuity.
    An open in the wire
    Check for continuity between terminal No. 12 and body ground: There should be no continuity.
    A short to ground in the wire
    10
    LT BLU
    Under all conditions
    Check for continuity between terminal No. 10 and right rear corner parking sensor terminal No. 6: There should be continuity.
    An open in the wire
    Check for continuity between terminal No. 10 and body ground: There should be no continuity.
    A short to ground in the wire
    11
    YEL
    Under all conditions
    Check for continuity between terminal No. 11 and right rear corner parking sensor terminal No. 4: There should be continuity.
    An open in the wire
    Check for continuity between terminal No. 11 and body ground: There should be no continuity.
    A short to ground in the wire

  1. Reconnect the 16P connector to the parking sensor and back-up sensor control unit, and do these input tests at the following connector.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, parking and back-up sensor control unit must be faulty; replace it.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    5
    ORN
    Ignition switch ON (II) and parking and back-up sensor switch ON
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 10 (7.5 A) fuse in the under-dash fuse/relay box
    • Faulty switch
    • An open in the wire