Parking and Back-up Sensor Control Unit Test/Replacement
  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