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Home >> Honda >> 2004 >> Civic Si >> Repair and Diagnosis >> Engine Performance >> System >> Idle Control System (Hatchback) >> Brake Pedal Position Switch Signal Circuit Troubleshooting
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Brake Pedal Position Switch Signal Circuit Troubleshooting

  1. Check the brake lights.
    1. Are the brake lights on without pressing the brake pedal? 
      1. YES:  Inspect the brake pedal position switch adjustment (see DISC & DRUM - EXCEPT HYBRID ).
      2. NO:  Go to step 2.
  2. Press the brake pedal.
    1. Do the brake lights come on? 
      1. YES:  Go to step 3.
      2. NO:  Go to step  4.
  3. Measure voltage between ECM connector terminals A24 and E22 with the brake pedal pressed.
    1. Is there battery voltage? 
      1. YES:  The brake pedal position switch signal is OK.
      2. NO:  Repair open in the wire between the ECM (E22) and the brake pedal position switch.
      2. Fig 1: Measuring Voltage Between ECM Connector Terminals A24 And E22 (Brake Pedal Pressed)
      G01399539Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Inspect the No. 7 HORN, STOP (15A) fuse in the under-hood fuse/relay box.
    1. Is the fuse OK? 
      1. YES:  Repair open in the wire between the brake pedal position switch and the No. 7 HORN, STOP (15A) fuse. If the wire is OK, replace and adjust the brake pedal position switch (see DISC & DRUM - EXCEPT HYBRID ).
      2. NO:  Repair short in the wire between the ECM (E22) and the No. 7 HORN, STOP (15A) fuse. Replace the No. 7 HORN, STOP (15A) fuse.
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