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Home >> Acura >> 2007 >> RL >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Multiplex Integrated Control System) >> Combination Switch Control Unit Input Test
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Combination Switch 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.
  1. Remove the steering column covers (see STEERING COLUMN REMOVAL AND INSTALLATION ).
  2. Disconnect the 8P connector from the wiper/washer switch.
    Fig 1: Identifying Wiper/Washer Switch 8P Connector
    G05462623Courtesy 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, 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.
      WIRE TEST CONDITION CHART

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      4 LT GRN Under-dash fuse/relay box connector X (39P) disconnected Check for continuity between No. 4 terminal and the under-dash fuse/relay box connector X (39P) No. 27 terminal: There should be continuity. An open in the wire
  5. Reconnect the connectors and, make these input test at the connectors.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, the combination switch control unit must be faulty, replace the wiper/washer switch.
      WIRE TEST CONDITION CHART

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      3 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V.
      • Poor ground (G503, G601)
      • An open in the wire
      8 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
      • A short to ground in the wire
      • An open in the wire
      7 YEL Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage.
      • Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box
      • A short to ground in the wire
      • An open in the wire
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