Front Passenger's Power Window Switch Input Test (4-door)

2020 Honda Civic Si, 4D SedanSECTION Front Passenger's Power Window Switch Input Test (4-door)

NOTE:Β 

  • Before testing, make sure the No. B15 (20 A) fuse in the under-dash fuse/relay box is OK.
  • Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.

1. Turn the vehicle to the OFF (LOCK) mode.

2. Disconnect the front passenger's power window switch 37P connector

.

GHH413026Courtesy of HONDA, U.S.A., INC.

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 are OK, go to step 4.

With the connector still disconnected, do the following input tests:

  • 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.
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
4*2 BLU*RED Connect terminals No. 4 and No. 1, and terminals No. 2 and No. 3 with jumper wires. Check front passenger's power window motor operation: The front passenger's power window should close.
  • Faulty front passenger's power window motor
  • Poor ground (G505)
  • An open or high resistance in the wire
Connect terminals No. 2 and No. 1, and terminals No. 4 and No. 3 with jumper wires. Check front passenger's power window motor operation: The front passenger's power window should open.
25 BLK Disconnect the front passenger's power window motor 6P connector Check for continuity between terminal No. 25 and front passenger's power window motor 6P connector terminal No. 4: There should be continuity. An open or high resistance in the wire

*: With moonroof

Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
34 WHT Disconnect these connectors:
  • Power window master switch 37P connector
  • Moonroof motor-control unit 14P connector *
Check for continuity between terminal No. 34 and power window master switch 37P connector terminal No. 36: There should be continuity. An open in the LIN(P/W) wire
Check for continuity between terminal No. 34 and moonroof motor-control unit 14P connector terminal No. 12: There should be continuity. An open in the LIN(P/W) wire
Check for continuity to ground: There should be no continuity. A short to ground in the LIN(P/W) wire

*: With moonroof

Reconnect the connector, and do the following input tests:

NOTE:Β  After replacing the front passenger's power window switch, do the resetting the power window control unitΒ .

Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
1 GRN Under all conditions Measure the voltage to ground: There should be battery voltage.
  • Blown No. B15 (20 A) fuse in the under-dash fuse/relay box
  • An open or high resistance in the wire
3 BLK In all power modes Measure the voltage to ground: There should be less than 0.2 V.
  • Poor ground (G505)
  • An open or high resistance in the ground wire
31 PUR Vehicle ON mode Measure the voltage to ground: There should be battery voltage.
  • Faulty front passenger's power window motor
  • A short to ground in the wire
35 RED Vehicle ON mode, and front passenger's power window moving up or down Measure the voltage between terminals No. 35 and No. 3: An analog meter should alternate between 0 V and 5 V (a digital voltmeter should read about 2.5 V while the window moves).
  • Faulty front passenger's power window motor
  • An open or high resistance in the wire
  • A short to ground in the wire
37 PNK Vehicle ON mode, and front passenger's power window moving up or down Measure the voltage between terminals No. 37 and No. 3: An analog meter should alternate between 0 V and 5 V (a digital voltmeter should read about 2.5 V while the window moves).
  • Faulty front passenger's power window motor
  • An open or high resistance in the wire
  • A short to ground in the wire
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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