2005 Acura RLFACTORY OEM SERVICE PROCEDURE

Display Panel Control Unit Input Test

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.
NOTE:
  1. Remove the audio-HVAC display module assembly (see AUDIO-HVAC DISPLAY MODULE ASSEMBLY REMOVAL/INSTALLATION  ).
    Fig 1: Identifying Audio-HVAC Display Module Assembly
    G05463255Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. 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 3.
  3. Reconnect the connector, and 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 4.
      TEST CONDITION

      Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
      A5 BLK Under all conditions Measure the voltage to ground:
      There should be less than 0.1 V.
      • Poor ground (G501)
      • An open in the wire
      A9 YEL/RED Ignition switch ACC (I) Measure the voltage to ground:
      There should be battery voltage.
      • Blown No. 32 (7.5A) fuse in the under-dash fuse/relay box
      • An open in the wire
      A10 WHT/RED Under all conditions Measure the voltage to ground:
      There should be battery voltage.
      • Blown No. 7 (7.5 A) fuse in the under-dash fuse/relay box
      • An open in the wire
      A8 RED/BLK Combination light switch ON Measure the voltage to ground:
      There should be battery voltage.
      • Faulty interior light circuit
      • An open in the wire
  4. Disconnect display panel control unit connector A (22P) and 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 navigation system (see GENERAL TROUBLESHOOTING INFORMATION ) and climate control (see GENERAL TROUBLESHOOTING INFORMATION ). If the navigation system and climate control system are OK, replace the display panel control unit.
      TEST CONDITION

      Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
      A6 RED Gauge control module connector B (18P) disconnected Check for continuity between the A6 terminal and gauge control module B9 terminal:
      There should be continuity.      		 An open in the wire
      A15 RED/BLU Gauge control module connector B (18P) disconnected Check for continuity between the A15 terminal and gauge control module B8 terminal:
      There should be continuity.      		 An open in the wire
      A7 BLU Audio unit connector C (40P) disconnected Check for continuity between the A7 terminal and audio unit C9 terminal:
      There should be continuity.      		 An open in the wire
      A16 ORN Audio unit connector C (40P) disconnected Check for continuity between the A16 terminal and audio unit C27 terminal:
      There should be continuity.      		 An open in the wire
      A17 BLK Audio unit connector C (40P) disconnected Check for continuity between the A17 terminal and audio unit C28 terminal:
      There should be continuity.      		 An open in the wire
      A18 GRY Audio unit connector C (40P) disconnected Check for continuity to ground:
      There should be continuity.      		 An open in the wire
      A19 PNK Audio unit connector C (40P) disconnected Check for continuity between the A19 terminal and audio unit C29 terminal:
      There should be continuity.      		 An open in the wire
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