Power Window Control Unit Input Test
WARNING: This page is about a different car, the 2008 Honda Pilot, 2007 Honda Pilot, and 2006 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the driver's door panel (see FRONT DOOR PANEL REMOVAL/INSTALLATION ), but leave the driver's door subharness connector connected to the driver's door wire harness.
- Disconnect the 18P connector (A) from the power window control unit (B).
- 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.
- Reconnect the connector to the control unit, and make these input tests 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, go to step 5.CONTROL UNIT
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 1 BLK Under all conditions Measure the voltage to ground:
There should be less than 1 V.- Poor ground (G601)
- An open in the wire
8 GRN Under all conditions(1) Measure the voltage to ground:
There should be battery voltage.- Blown No. 1 (20 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
7 WHT/YEL Ignition switch ON (II) and passenger's multiplex terminal A12 connected to battery voltage Measure the voltage to ground:
There should be battery voltage.- Blown No. 7 (20 A) fuse in the passenger's under-dash fuse/relay box
- Faulty power window relay
- An open in the wire
13 BLK/WHT Ignition switch ON (II) and driver's window switch UP Measure the voltage to ground:
There should be battery voltage.- Faulty power window master switch
- An open in the wire
11 YEL/GRN Ignition switch ON (II) and driver's window switch AUTO UP Ignition switch ON (II) and driver's window switch AUTO DOWN 15 RED/GRN Ignition switch ON (II) and driver's window switch DOWN 17 WHT Ignition switch ON (II) Measure the voltage between the No. 17 (+) and No. 9 (-) terminals:
There should be battery voltage.- Faulty power window motor
- Faulty pulser
- An open in the wire
- Faulty power window control unit
9 BLK 5 YEL While operating the driver's window switch Measure the voltage between the No. 5 (+) and No. 9 (-) terminals:
There should be pulse voltage 0-5 V (an analog voltmeter needle should move back and forth alternately; a digital voltmeter should show the average voltage of about 2.5 V).16 BLU While operating the driver's window switch Measure the voltage between the No. 16 (+) and No. 9 (-) terminals:
There should be pulse voltage 0-5 V (an analog voltmeter needle should move back and forth alternately; a digital voltmeter should show the average voltage of about 2.5 V).17 WHT Ignition switch ON (II) Measure the voltage the voltage between terminal No. 17 and body ground: There should be battery voltage. - Faulty power window control unit
- Short to ground
- Faulty power window motor
(1) Make sure the driver's door subharness is connected (2) Passenger's multiplex control unit connector
- Disconnect the 18P connector from the power window control unit, then 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 control unit must be faulty; replace it.POWER WINDOW CONTROL UNIT
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 4 BLU/GRN Driver's window switch DOWN Check for continuity to ground:
There should be continuity.- Poor ground (G401, G601)
- Faulty power window master switch
- An open in the wire
4 BLU/GRN Driver's window switch OFF Check for continuity between the No. 4 and No. 14 terminals:
There should be continuity.- Faulty power window master switch
- An open in the wire
14 BLU/ORN 3 RED/BLU Connect the battery power to the No. 12 (+) and ground the No. 3 (-) terminals Check for driver's window motor operation:
It should run (the window moves down).- Faulty power window motor
- An open in the wire
12 RED/YEL Connect the battery power to the No. 3 (+) and ground the No. 12 (-) terminals Check for driver's window motor operation:
It should run (the window moves up).- Faulty power window motor
- An open in the wire