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Immobilizer-Keyless Control Unit Input Test

  1. Disconnect the 7P connector (A) from the immobilizer-keyless 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 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 immobilizer-keyless control unit must be faulty; replace it.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    1
    PNK
    Under all conditions
    Measure the voltage between the immobilizer-keyless control unit 7P connector No. 1 terminal and body ground: There should be battery voltage.
    • Blown No. 1 (10 A) fuse in the under-dash fuse/relay box
    • An open in the wire
    2
    RED
    Ignition switch ON (II)
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 20 (15 A) fuse in the under-dash fuse/relay box
    • An open in the wire
    7
    BRN
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G101)
    • An open in the wire
    6
    GRY
    Ignition key inserted into the ignition switch
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • Faulty ignition key switch
    • An open in the wire
    Ignition key removed form the ignition switch
    Check for continuity: There should be no continuity.
    • Faulty ignition key switch
    • A short to ground in the wire