Pinpoint Test D: A Single Power Window is Inoperative - LH Front
Glass, Frames and Mechanisms
Pinpoint Tests
Pinpoint Test D: A Single Power Window is Inoperative - LH Front, Edge
Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. Diagrams By Number
NOTE: A new LH front window motor will not operate in one-touch up or one-touch down mode until initialized. Refer to Window Motor Initialization Testing and Inspection.
NOTE: The LH front window motor must be initialized whenever a new motor is installed.
NOTE: The front window motor must be de-initialized, then initialized whenever the LH or RH (MKX) or LH (Edge) front window motor is removed from the window regulator drum housing, a new window regulator is installed, a new window glass is installed, a new top run is installed or for any operation in which grease or lubricants are applied to the window regulator or glass run.
Normal Operation
The LH front window control switch receives power from the accessory delay relay through circuit CBP41 (BU). The LH window motor receives battery power through circuit SBP04 (GN/RD) and ground through circuit GD133 (BK). When the LH front window control switch is pulled, the LH front window motor receives a voltage signal through circuit CPW11 (BU/GY) which causes the window to move upward. When the LH front window control switch is pressed, the LH front window motor receives a voltage signal through circuit CPW10 (YE/VT) which causes the window to move downward. When the LH front window control switch is pressed or pulled to the second detent position (AUTO), the LH front window motor receives a ground signal on circuit CPW29 (VT/GY) which causes the LH front window motor to enter one-touch up/down mode.
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- LH front window motor
- LH front window control switch
- LH front window motor not initialized
PINPOINT TEST D: A SINGLE POWER WINDOW IS INOPERATIVE - LH FRONT, EDGE
NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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D1 CHECK THE POWER TO THE WINDOW MOTOR
- Disconnect: LH Front Window Motor C540.
- Measure the voltage between LH front window motor C540-1, circuit SBP04 (GN/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to D2.
No
VERIFY Smart Junction Box (SJB) fuse 4 (30A) is OK. If OK, REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization Testing and Inspection. TEST the system for normal operation.
If not OK, Refer to the Wiring Diagrams to identify the possible causes of the circuit short. REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization Testing and Inspection. TEST the system for normal operation. Diagrams By Number
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D2 CHECK CIRCUIT CBP41 (BU) FOR AN OPEN
- Ignition ON.
- Measure the voltage between LH front window motor C540-3, circuit CBP41 (BU), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to D3.
No
REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization Testing and Inspection. TEST the system for normal operation.
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D3 CHECK CIRCUIT GD133 (BK) FOR AN OPEN
- Ignition OFF.
- Measure the resistance between LH front window motor C540-4, circuit GD133 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to D4.
No
REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization Testing and Inspection. TEST the system for normal operation.
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D4 CHECK THE LH FRONT WINDOW CONTROL SWITCH-TO-LH FRONT WINDOW MOTOR FEEDS
- Disconnect: LH Front Window Control Switch C504A.
- Measure the resistance between LH front window motor C540-6, circuit CPW10 (YE/VT), harness side and LH front window control switch C504A-1, circuit CPW10 (YE/VT), harness side.
- Measure the resistance between LH front window motor C540-2, circuit CPW29 (VT/GY), harness side and LH front window control switch C504A-7, circuit CPW29 (VT/GY), harness side.
- Measure the resistance between LH front window motor C540-5, circuit CPW11 (BU/GY), harness side and LH front window control switch C504A-5, circuit CPW11 (BU/GY), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to D5.
No
REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization Testing and Inspection. TEST the system for normal operation.
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D5 CHECK THE LH FRONT WINDOW CONTROL SWITCH
- Carry out the LH front window control switch component test.
- Did the LH front window control switch pass the component test?
Yes
INSTALL a new LH front window motor. REFER to Window Regulator Motor Window Regulator Motor. INITIALIZE the LH front window motor. REFER to Window Motor Initialization Testing and Inspection. TEST the system for normal operation.
No
INSTALL a new LH front window control switch. REFER to Window Control Switch Service and Repair. INITIALIZE the LH front window motor. REFER to Window Motor Initialization Testing and Inspection. TEST the system for normal operation.
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