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Home >> Acura >> 2007 >> RL >> Repair and Diagnosis >> External Pages >> Different car >> Section 49 (Immobilizer System) >> Imoes Unit Input Test/Replacement >> '08 Model
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'08 Model

WARNING: This page is about a different car, the 2008 Acura TL and 2007 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the glove box (see GLOVE BOX HOUSING REMOVAL/INSTALLATION ).
  2. Remove the two nuts and the imoes unit (A).
    Fig 1: Identifying Imoes Unit Nuts
    G05462886Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Disconnect the 5P connector (B) from the imoes unit.
  4. 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.
  5. With the connectors 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, replace the imoes unit.
    TESTING CONDITION CHART

    Cavity Wire (Signal) Test condition Test: Desired result Possible cause if desired result is not obtained
    1 BRN/YEL (LG1) Under all conditions Check for continuity to ground:
    There should be continuity.
    • Poor ground (G101)
    • An open in the wire
    5 WHT/RED (+B) Under all conditions Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. 15 (40 A) fuse in the under-hood fuse/relay box
    • Blown No. 7 (7.5 A) fuse in the under-dash fuse/relay box
    • A short to ground in the wire
    • An open in the wire
    3 BLK/GRN (IG1) Ignition switch ON (II) Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. 19 (15 A) fuse in the under-dash fuse/relay box
    • A short to ground in the wire
    • An open in the wire
    4 BLU (KEY SW) Ignition key is in the ignition switch Measure the voltage to ground:
    There should be less than 1 V.
    • Faulty ignition key switch
    • An open in the wire
    • Poor ground (G501)
    Ignition key is removed from the ignition switch Measure the voltage to ground:
    There should be battery voltage.
    • Faulty ignition key switch
    • A short to ground in the wire
    2 YEL (S-NET (IMOCD)) Jump the SCS line with the HDS, disconnect ECM/PCM connector E (31P), and the immobilizer control unit-receiver unit 7P connector. Check for continuity between the No. 2 terminal and ECM/PCM connector E (31P) No. 25 terminal:
    There should be continuity.    		 An open in the wire
    Check for continuity to ground:
    There should be no continuity.    		 A short to ground in the wire
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