FixVault
Home › Acura › 2011 › RDX 2.3 TB1 › Repair and Diagnosis (Single Page) › Body & Frame › Door Locks › Immobilizer System › Immobilizer-Keyless Control Unit Input Test

Immobilizer-Keyless Control Unit Input Test

NOTE:
  • SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ) and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or servicing.
  • Before troubleshooting the immobilizer system, check the No. 2 (20 A) fuse in the under-dash fuse/relay box and No. 23 (10 A) fuse in the under-hood fuse/relay box.
  1. Remove the steering column covers (see COLUMN COVER REMOVAL/INSTALLATION ).
  2. Disconnect the 7P connector (A) from the immobilizer-keyless control unit (B).
    Fig 1: Identifying Immobilizer-Keyless Control Unit And 7P Connector End View
    G08061418Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. 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.
  4. With the connector still disconnected, do the following input tests:
    • 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 (Signal) Test condition Test: Desired result Possible cause if desired result is not obtained
      1 GRN (VBU) Under all conditions Measure the voltage to ground: There should be battery voltage.
      • Blown No. 23 (10 A) fuse in the under-hood fuse/relay box
      • An open or high resistance in the wire
      2 YEL (IG1) Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage.
      • Blown No. 2 (20 A) fuse in the under-dash fuse/relay box
      • An open or high resistance in the wire
  5. Reconnect the connector to the immobilizer-keyless control unit, and do the following input tests:
    • 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 (see IMMOBILIZER-KEYLESS CONTROL UNIT REPLACEMENT  ).
      Cavity Wire (Signal) Test condition Test: Desired result Possible cause if desired result is not obtained
      7 BRN (LG1) In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V.
      • Poor ground(G101)
      • An open or high resistance in the ground wire
      6 PNK (IG-KEYSW) Ignition key inserted into the ignition switch Measure the voltage to ground: There should be less than 0.2 V.
      • Poor ground (G502) or an open in the ground wire
      • Faulty ignition key switch
      • An open or high resistance in the wire
      Ignition switch in LOCK (0) and ignition key removed from the ignition switch Measure the voltage to ground: There should be at least 5 V.
      • Faulty ignition key switch
      • A short to ground in the wire
About FixVault