Pinpoint Test D: A Single Power Window is Inoperative - LH Front
Glass, Frames and Mechanisms
Pinpoint Test D: A Single Power Window is Inoperative - MKZ, LH Front
Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. [1][2]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 .
Normal Operation
Under normal operation, voltage is supplied to the master window control switch from the accessory delay relay. The LH front power window motor has dedicated high current power and ground circuits. When the master window control switch is activated, a low current voltage signal is supplied to the LH front power window motor which causes the window to move upward or downward.
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- Power window motor
- Window control switch
PINPOINT TEST D : A SINGLE POWER WINDOW IS INOPERATIVE - MKZ, LH FRONT
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.
D1 CHECK THE POWER TO THE MASTER WINDOW CONTROL SWITCH
- Disconnect: Master Window Control Switch C535A.
- Ignition ON.
- Measure the voltage between master window control switch C535A-3, circuit CBP41 (BU), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to D2.
No
VERIFY Smart Junction Box (SJB) fuse 41 (15A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. DE-INITIALIZE then INITIALIZE the front window motor. REFER to Window Motor Initialization . TEST the system for normal operation. [1][2]Diagrams By Number
D2 CHECK THE VOLTAGE TO THE POWER WINDOW MOTOR
- Ignition OFF.
- Disconnect: LH Front Power Window Motor C540.
- Measure the voltage between LH front power window motor C540-4, circuit SBP01 (RD), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to D3.
No
VERIFY SJB (Smart Junction Box) fuse 1 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. DE-INITIALIZE, then INITIALIZE the LH front window motor. REFER to Window Motor Initialization . TEST the system for normal operation. [1][2]Diagrams By Number
D3 CHECK THE LH FRONT POWER WINDOW MOTOR GROUND CIRCUIT FOR AN OPEN
- Measure the resistance between LH front power window motor C540-3, circuit GD126 (BK/WH), 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 . TEST the system for normal operation.
D4 CHECK THE MASTER WINDOW CONTROL SWITCH-TO-LH FRONT POWER WINDOW MOTOR CIRCUITS FOR AN OPEN
- Measure the resistance between LH front power window motor C540-1, circuit CPW10 (YE/VT), harness side and master window control switch C535A-8, circuit CPW10 (YE/VT), harness side.
- Measure the resistance between LH front power window motor C540-6, circuit CPW11 (BU/GY), harness side and master window control switch C535A-4, circuit CPW11 (BU/GY), harness side.
Are the resistances less than 5 ohms?
Yes
GO to D5.
No
REPAIR circuit CPW10 (YE/VT) or CPW11 (BU/GY) for an open. DE-INITIALIZE then INITIALIZE the LH front window motor. REFER to Window Motor Initialization . TEST the system for normal operation.
D5 CHECK THE MASTER WINDOW CONTROL SWITCH
- Carry out the master window control switch component test.
Did the master window control switch pass the component test?
Yes
INSTALL a new LH front power window motor. REFER to Window Regulator and Motor - Front Door . INITIALIZE the LH front power window motor. REFER to Window Motor Initialization . TEST the system for normal operation.
No
INSTALL a new master window control switch. REFER to Window Control Switch . DE-INITIALIZE, then INITIALIZE the LH front power window motor. REFER to Window Motor Initialization . TEST the system for normal operation.