Sunroof Control Unit (Motor) Input Test
NOTE: If the sunroof works OK manually, but will not work in AUTO, or reverses frequently (obstacle detection), reset the sunroof control unit before proceeding with the input test.
  1. Turn the ignition switch to LOCK (0).
  1. Remove the headliner.
  1. Disconnect the 14P connector (A) from the sunroof 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 5 .
  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, go to Step 6 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    11
    BLU
    Under all conditions
    Check for continuity between the sunroof switch 14P connector No. 11 terminal and power window master switch 37P connector No. 27 terminal: There should be continuity.
    An open in the wire
    Check for continuity between the sunroof switch 14P connector No. 11 terminal and body ground: There should be no continuity.
    A short to ground in the wire
    7
    GRN
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 20 (20 A) fuse in the driver's under-dash fuse/relay box
    • An open in the wire
    8
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • An open in the wire
    2
    GRY
    Sunroof switch in CLOSE position
    Check for continuity to ground: There should be continuity.
    • Faulty sunroof switch
    • An open in the wire
    • Poor ground (G501)
    3
    LT GRN
    Sunroof switch in TILT position
    Check for continuity to ground: There should be continuity.
    4
    LT BLU
    Sunroof switch in OPEN position
    Check for continuity to ground: There should be continuity.
    9
    PUR
    Sunroof switch in AUTO OPEN or AUTO CLOSE position
    Check for continuity to ground: There should be continuity.

  1. If all the input tests are OK and multiple failures are found, replace the sunroof control unit/motor assembly. If the problem is related to the key-off operation, go to the driver's MICU input test , and door multiplex control unit input test.