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HOMESERVICE MANUALSACURA2008TSX STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESMULTIPLEX INTEGRATED CONTROL SYSTEMCLIMATE CONTROL UNIT INPUT TEST
2008 Acura TSX Standard

Climate Control Unit Input Test

2008 Acura TSX StandardSECTION Climate Control Unit Input Test
  1. Remove the audio-HVAC display module (see AUDIO-HVAC DISPLAY MODULE REMOVAL/INSTALLATION ).
  2. Disconnect the audio-HVAC display panel connector B (16P).
    Fig 1: Identifying Audio-HVAC Display Panel Connector B (16P) Terminals
    G05492802Courtesy 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. Reconnect the connector to the audio-HVAC display panel, 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 5.
      INPUT TEST CONDITION REFERENCE CHART

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      B4 BLK/YEL(1) YEL(2) Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage.
      • Blown No. 30 (7.5 A) fuse in the under-dash fuse/relay box
      • An open in the wire
      B6 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V.
      • Poor ground (G503)
      • An open in the wire
      (1) '04 model
      (2) '05-08 models
  5. Disconnect the audio-HVAC display panel connector B (16P), 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, the audio-HVAC display panel must be faulty, replace it.
      INPUT TEST CONDITION REFERENCE CHART

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      B14 LT BLU Under-dash fuse/relay box connector N (45P) disconnected Check for continuity between No. 14 terminal and the under-dash fuse/relay box connector N (45P) No. 22 terminal: There should be continuity. An open in the wire
      Check for continuity to ground: There should be no continuity. Short to ground on the wire
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.