SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSHONDA2003CIVIC HX, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 7 (HVAC SYSTEMS (HATCHBACK))POWER TRANSISTOR TEST
2003 Honda Civic HX, Standard

Power Transistor Test

2003 Honda Civic HX, StandardSECTION Power Transistor Test
WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the 4P connector from the power transistor.
  2. Measure the resistance between the No. 1 and No. 2 terminals of the power transistor. It should be about 1.4-1.5 kΞ©.
    • If the resistance is within the specifications, go to step 3.
    • If the resistance is not within the specifications, replace the power transistor.
    Fig 1: Measuring Resistance Between The Terminals Of The Power Transistor
    G01400605Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Carefully release the lock tab on the No. 4 terminal (BLU/YEL) (A) in the 4P connector, then remove the terminal and insulate it from body ground.
    Fig 2: Testing Power Transistor
    G01400606Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Reconnect the 4P connector to the power transistor.
  5. Supply 12 volts to the No. 4 cavity with a jumper wire.
  6. Turn the ignition switch ON (II), and check that the blower motor runs.
    • If the blower motor does not run, replace the power transistor.
    • If the blower motor runs, the power transistor is OK.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

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

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