Pinpoint Test B: A Single Power Window Is Inoperative - LH Front
Glass, Frames and Mechanisms
Pinpoint Tests
Pinpoint Test B: A Single Power Window is Inoperative - LH Front
Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. Diagrams By Number
NOTE: A new LH front power window motor will not operate in one-touch up mode until initialized. Refer to Window Motor Initialization - Front Window Motor Initialization - Front.
NOTE: The LH front power window motor must be de-initialized, then initialized whenever the LH 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
Under normal operation, the LH front power window motor microprocessor receives voltage from the accessory delay relay through circuit CBP05 (YE). The LH window motor receives battery voltage at all times through circuit SBB37 (GY/RD) and ground through circuit GD133 (BK). The LH front window control switch provides a voltage input to the power window motor microprocessor through circuit CPW11 (BU/GY) to operate the window upward, and voltage input through circuit CPW10 (YE/VT) to operate the driver window upward. When the LH front window control switch is operated to the second detent position (up/down) a ground signal is supplied to the LH front window motor through circuit CPW29 (VT/GY) 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 control switch
- LH front power window motor
PINPOINT TEST B: A SINGLE POWER WINDOW IS INOPERATIVE - LH FRONT
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B1 CHECK THE POWER TO THE WINDOW MOTOR
- Ignition OFF.
- Disconnect: LH Front Window Motor C540.
- Ignition ON.
- Measure the voltage between LH front window motor C540-2, circuit CBP05 (YE), harness side and ground; and between LH front window motor C540-3, circuit SBB37 (GY/RD), harness side and ground.
- Is the voltage greater than 10 volts for both measurements?
Yes
GO to B2.
No
VERIFY Smart Junction Box (SJB) fuse 5 (5A) and Battery Junction Box (BJB) fuse 37 (30A) are OK. If OK, REPAIR the circuit in question.
DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization - Front Window Motor Initialization - Front. 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 - Front Window Motor Initialization - Front. TEST the system for normal operation. Diagrams By Number
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B2 CHECK THE LH FRONT WINDOW MOTOR GROUND
- Ignition OFF.
- Measure the resistance between LH front window motor C540-8, circuit GD133 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to B3.
No
REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization - Front Window Motor Initialization - Front. TEST the system for normal operation.
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B3 CHECK CIRCUIT CPW10 (YE/VT) FOR AN OPEN
- Disconnect: LH Front Window Control Switch C504A.
- Measure the resistance between LH front window motor C540-4, circuit CPW10 (YE/VT), harness side and LH front window control switch C504A-1, circuit CPW10 (YE/VT), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to B4.
No
REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization - Front Window Motor Initialization - Front. TEST the system for normal operation.
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B4 CHECK CIRCUIT CPW11 (BU/GY) FOR AN OPEN
- Measure the resistance between LH front window motor C540-7, 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 B5.
No
REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization - Front Window Motor Initialization - Front. TEST the system for normal operation.
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B5 CHECK CIRCUIT CPW29 (VT/GY) FOR AN OPEN
- Measure the resistance between LH front window motor C540-6, circuit CPW29 (VT/GY), harness side and LH front window control switch C504A-7, circuit CPW29 (VT/GY), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to B6.
No
REPAIR the circuit. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization - Front Window Motor Initialization - Front. TEST the system for normal operation.
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B6 CHECK THE LH FRONT WINDOW CONTROL SWITCH
- Carry out the LH front window control switch component test.
- Did the window control switch pass the component test?
Yes
INSTALL a new LH front window motor. REFER to Window Regulator Motor - Front Door Window Regulator Motor - Front Door. INITIALIZE the LH front window motor. REFER to Window Motor Initialization - Front Window Motor Initialization - Front. TEST the system for normal operation.
No
INSTALL a new LH front window control switch. REFER to Window Control Switch Service and Repair. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization - Front Window Motor Initialization - Front. TEST the system for normal operation.
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