Pinpoint Test E: A Single Power Window is Inoperative - LH Front Window
Glass, Frames and Mechanisms
Pinpoint Test E: A Single Power Window is Inoperative - LH Front Window
Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information Electrical Diagrams.
Normal Operation
There are two voltage supplies to the master window control switch for LH front window operation. One circuit powers the integral electronics, the other provides high current voltage for the LH front window motor. The master window control switch and LH front window motor are grounded through the same circuit. The master window control switch provides voltage and ground to the LH front window motor. Window direction is controlled by reversing polarity of the voltage and ground circuits being supplied to the window motor.
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- Window control switch
- Window regulator motor
PINPOINT TEST E : A SINGLE POWER WINDOW IS INOPERATIVE - LH FRONT WINDOW
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.
E1 CHECK FOR VOLTAGE TO THE MASTER WINDOW CONTROL SWITCH
- Ignition OFF.
- Disconnect: Master Window Control Switch C504A.
- Ignition ON.
- Measure the voltage between master window control switch C504A-7, circuit CBP34 (VT/BN), harness side and ground; and between master window control switch C504A-8, circuit SBP16 (VT/RD), harness side and ground.
Is the voltage greater than 10 volts for both measurements?
Yes
GO to E2.
No
VERIFY Central Junction Box (CJB) fuses 16 (7.5A) and 34 (30A) are OK. If OK, REPAIR the circuit(s). CARRY OUT the window motor initialization procedure. REFER to Window Motor Initialization Programming and Relearning. TEST the system for normal operation.
If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short Electrical Diagrams. REPAIR the circuit(s). CARRY OUT the window motor initialization procedure. REFER to Window Motor Initialization Programming and Relearning. TEST the system for normal operation.
E2 CHECK THE MASTER WINDOW CONTROL SWITCH GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Measure the resistance between master window control switch C504A-2, circuit GD143 (BK/VT), harness side and ground.
Is the resistance less than 5 ohms?
Yes
GO to E3.
No
REPAIR the circuit. CARRY OUT the window motor initialization procedure. REFER to Window Motor Initialization Programming and Relearning. TEST the system for normal operation.
E3 CHECK FOR VOLTAGE AND GROUND TO THE WINDOW MOTOR
- Ignition OFF.
- Connect: Master Window Control Switch C504A.
- Disconnect: LH Front Power Window Motor C524.
- Ignition ON.
- NOTE: During the following step, the voltage being measured changes polarity dependent upon which direction the window control switch is activated.
Measure the voltage between LH front power window motor C524-1, circuit CPW11 (BU/GY), harness side and LH front power window motor C524-2, circuit CPW10 (YE/VT), harness side while operating the master window control switch in the down then up positions.
Is the voltage greater than 10 volts when the window control switch is operated and 0 volt in the rest position?
Yes
INSTALL a new LH front window regulator motor. REFER to Window Regulator Motor - Front Door Window Regulator Motor - Front Door. TEST the system for normal operation.
No
GO to E4.
E4 CHECK FOR AN OPEN CIRCUIT BETWEEN THE MASTER WINDOW CONTROL SWITCH AND THE WINDOW MOTOR
- Ignition OFF.
- Disconnect: Master Window Control Switch C504A.
- Measure the resistance between master window control switch C504A, harness side and LH front power window motor C524, harness side using the following chart:
Master Window Control Switch Circuit LH Front Power Window Motor C504A-3 CPW11 (BU/GY) C524-1 C504A-5 CPW10 (YE/VT) C524-2
Are the resistances less than 5 ohms?
Yes
INSTALL a new master window control switch. REFER to Window Control Switch Service and Repair. TEST the system for normal operation.
No
REPAIR the circuit(s). CARRY OUT the window motor initialization procedure. REFER to Window Motor Initialization Programming and Relearning. TEST the system for normal operation.