Pinpoint Test K: The Power Rear Window Is Inoperative
Glass, Frames and Mechanisms
Pinpoint Tests
Pinpoint Test K: The Power Rear Window is Inoperative
Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. Diagrams By Number
Normal Operation
Under normal operation, the power rear window motor receives voltage at all times through circuit SBB10 (YE/RD). When the accessory delay relay is active, voltage is sent to the power rear window motor microprocessor and rear window control switch (part of the overhead console switch assembly) through circuit CBP05 (YE). The power rear window motor is grounded through circuit GD148 (BK/YE). The power rear window motor receives a voltage input signal from the rear window control switch through circuit CPW58 (YE/OG) to operate the rear window downward; and through CPW59 (VT/BN) to operate the rear window upward. Ground is provided to the rear window control switch through circuit GD133 (BK).
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- Power rear window control switch
- Power rear window motor
- Rear window regulator
PINPOINT TEST K: THE POWER REAR WINDOW IS INOPERATIVE
NOTE: The initialization procedure must be carried out when repairs are carried out on any part of the power rear window system including when the power rear window motor is removed from the window regulator drum housing, a new power rear motor is installed, a new power rear window regulator is installed, a new power rear window glass module is installed and any operation in which grease or lubricants are applied to the power rear window system.
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K1 CHECK CIRCUIT SBB10 (YE/RD) FOR VOLTAGE
- Disconnect: Rear Window Motor C351.
- Measure the voltage between power rear window motor C351-3, circuit SBB10 (YE/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to K2.
No
VERIFY Battery Junction Box (BJB) fuse 10 (20A) is OK. If OK, REPAIR the circuit. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. 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. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. TEST the system for normal operation.
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K2 CHECK CIRCUIT CBP05 (YE) FOR VOLTAGE
- Ignition ON.
- Measure the voltage between power rear window regulator motor C351-2, circuit CBP05 (YE), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to K3.
No
VERIFY Smart Junction Box (SJB) fuse 5 (5A) is OK. If OK, REPAIR the circuit. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. 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. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. TEST the system for normal operation.
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K3 CHECK THE POWER REAR WINDOW MOTOR GROUND
- Ignition OFF.
- Measure the resistance between power rear window motor C351-8, circuit GD148 (BK/YE), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to K4.
No
REPAIR the circuit. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. TEST the system for normal operation.
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K4 CHECK CIRCUIT CPW58 (YE/OG) FOR VOLTAGE
- Ignition ON.
- While pressing the power rear window control switch, measure the voltage between power rear window motor C351-4, circuit CPW58 (YE/OG), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to K6.
No
GO to K5.
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K5 ISOLATE OPEN IN CIRCUIT CPW58 (YE/OG)
- Ignition OFF.
- Disconnect: Rear Window Control Switch C912.
- Measure the resistance between power rear window motor C351-4, circuit CPW58 (YE/OG), harness side and power rear window control switch C912-4, circuit CPW58 (YE/OG), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to K8.
No
REPAIR the circuit. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. TEST the system for normal operation.
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K6 CHECK CIRCUIT CPW59 (VT/BN) FOR VOLTAGE
- While pulling the power rear window control switch, measure the voltage between power rear window motor C351-7, circuit CPW59 (VT/BN), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to K9.
No
GO to K7.
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K7 ISOLATE OPEN IN CIRCUIT CPW59 (VT/BN)
- Ignition OFF.
- Disconnect: Rear Window Control Switch C912.
- Measure the resistance between power rear window motor C351-7, circuit CPW59 (VT/BN), harness side and power rear window control switch C912-9, circuit CPW59 (VT/BN), harness side.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new power rear window control switch. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. TEST the system for normal operation.
No
REPAIR the circuit. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. TEST the system for normal operation.
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K8 CHECK CIRCUIT CBP05 (YE) FOR VOLTAGE AT THE REAR WINDOW CONTROL SWITCH
- Ignition ON.
- Measure the voltage between power rear window control switch C912-1, circuit CBP05 (YE), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
INSTALL a new power rear window control switch. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. TEST the system for normal operation.
No
REPAIR the circuit. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. TEST the system for normal operation.
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K9 CHECK POWER REAR WINDOW CONTROL SWITCH GROUND
- Ignition OFF.
- Measure the resistance between power rear window motor C351-4, circuit CPW58 (YE/OG), harness side and ground; and between power rear window motor C351-7, circuit CPW59 (VT/BN), harness side and ground.
- Is the resistance less than 5 ohms for both measurements?
Yes
INSTALL a new power rear window motor. REFER to Window Regulator Motor - Rear Service and Repair. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. TEST the system for normal operation.
No
GO to K10.
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K10 CHECK THE POWER REAR WINDOW CONTROL SWITCH
- Disconnect: Rear Window Control Switch C912.
- Carry out the power rear window control switch component test.
- Did the power rear window control switch pass the component test?
Yes
REPAIR open in circuit GD133 (BK). INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. TEST the system for normal operation.
No
INSTALL a new power rear window control switch. INITIALIZE the power rear window motor. REFER to Window Motor Initialization - Rear Window Motor Initialization - Rear. TEST the system for normal operation.
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