Parking and Back-up Sensor Control Unit Input Test
  1. Remove the driver's dashboard undercover, then remove the dashboard lower cover.
  1. Remove the parking and back-up sensor control unit (A).
  1. Disconnect the 16P connector (B) from the parking and back-up sensor control unit.
  1. Inspect the connector and socket terminals to be sure they are all making good contact.
    • If the terminal are bent, loose or corroded, repair them as necessary, and recheck the system.
    • If the terminals look OK, go to Step 5 .
  1. With the connectors still disconnected, make these input tests at the connectors.
    • 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 6 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    2
    RED
    Under all conditions
    Check for continuity between the No. 2 terminal and left front corner parking sensor No. 6 terminal: There should be continuity.
    An open in the wire
    Check for continuity between the No. 2 terminal and body ground: There should be no continuity.
    A short to ground in the wire
    3
    GRN
    Under all conditions
    Check for continuity between the No. 3 terminal and left front corner parking sensor No. 4 terminal: There should be continuity.
    An open in the wire
    Check for continuity between the No. 3 terminal and body ground: There should be no continuity.
    A short to ground in the wire
    4
    BLU
    Under all conditions
    Check for continuity between the No. 4 terminal and left front corner parking sensor No. 2 terminal: There should be continuity.
    An open in the wire
    Check for continuity between the No. 4 terminal 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 the No. 10 terminal and left rear corner parking sensor No. 6 terminal: There should be continuity.
    An open in the wire
    Check for continuity between the No. 10 terminal and body ground: There should be no continuity.
    A short to ground in the wire
    11
    YEL
    Under all conditions
    Check for continuity between the No. 11 terminal and left rear corner parking sensor No. 4 terminal: There should be continuity.
    An open in the wire
    Check for continuity between the No. 11 terminal and body ground: There should be no continuity.
    A short to ground in the wire
    12
    GRN
    Under all conditions
    Check for continuity between the No. 12 terminal and left rear corner parking sensor No. 2 terminal: There should be continuity.
    An open in the wire
    Check for continuity between the No. 12 terminal and body ground: There should be no continuity.
    A short to ground in the wire
    6
    BLU
    Under all conditions
    Check for continuity between the No. 6 terminal and driver's MICU connector P (20P) No. 5 terminal: There should be continuity.
    An open in the wire
    Check for continuity between the No. 6 terminal and body ground: There should be no continuity.
    A short to ground in the wire
    7
    PNK
    Under all conditions
    Check for continuity between the No. 7 terminal and driver's MICU connector P (20P) No. 6 terminal: There should be continuity.
    An open in the wire
    Check for continuity between the No. 7 terminal and body ground: There should be no continuity.
    A short to ground in the wire



  1. Reconnect the 16P connector to the parking and back-up sensor control unit, and 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, control unit must be faulty; replace it.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    16
    BLK
    Ignition switch ON (II)
    Check for continuity to ground: There should be continuity.
    • An open in the wire
    • Poor ground (G503)
    1
    BRN
    Ignition switch ON (II)
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 5 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • Faulty MICU
    • An open in the wire
    8
    PNK
    Ignition switch ON (II) and parking and back-up sensor switch ON
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 5 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • Faulty switch
    • An open in the wire
    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. 5 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • Faulty switch
    • Blown indicator bulb
    • An open in the wire