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Immobilizer indicator blinks

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Before troubleshooting, check the items listed in General Check before Troubleshooting
  1. Turn the ignition switch to LOCK (0)
  2. Connect the HDS, then turn the ignition switch to ON (II)
  3. From the main menu, enter IMMOBI, select IMMOBILIZER SETUP, then select System Check, Number of Keys, and Status Log
  4. Select SYSTEM CHECK

    5. Is SYSTEM CHECK indicated? 

    YES  -Troubleshoot the immobilizer system according to the result of the SYSTEM CHECK (see SYSTEM CHECK )

    NO  -Go to step 5

  5. Turn the ignition switch to LOCK (0)
  6. Enter the vehicle, and remove the ignition key from the ignition switch, then close all doors
  7. Operate the keyless transmitter LOCK and UNLOCK several times in the vehicle

    8. Do the door lock actuators work normally? 

    YES  -Go to step 8

    NO  -Check for a poor ground through PCM to G101 and/or an open in the wire between immobilizer-keyless control unit 7P connector terminal No 7 and PCM connector A (49P) terminal No 41

  8. Turn the ignition switch to ON (II)
  9. Back-probe and measure the voltage between immobilizer-keyless control unit 7P connector terminal No 2 and body ground
    10. Fig 1: Measuring Voltage Between Immobilizer-Keyless Control Unit 7P Connector Terminal No 2 And Body Ground
    G05989175Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step 10

    NO  -Check for a blown No 9 (20 A) fuse in the driver's under-dash fuse/relay box If the fuse is OK, repair open in the YEL wire between the driver's under-dash fuse/relay box and the immobilizer-keyless control unit

  10. Back-probe and measure the voltage between immobilizer-keyless control unit 7P connector terminal No 7 and body ground
    Fig 2: Measuring Voltage Between Immobilizer-Keyless Control Unit 7P Connector Terminal No 7 And Body Ground
    G05989176Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there at least 02 V? 

    YES  -Repair poor connection or open between immobilizer-keyless control unit 7P connector terminal No 7 and PCM connector A (49P) terminal No 41 and/or poor ground G101

    NO  -Replace the immobilizer-keyless control unit (see IMMOBILIZER-KEYLESS CONTROL UNIT REPLACEMENT )

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