Pinpoint Test H: The Left Or Right Power Window Is Inoperative - Rear Vent Window
Glass, Frames and Mechanisms
Pinpoint Tests
Pinpoint Test H: The Left or Right Power Window is Inoperative - Rear Vent Window
Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. Diagrams By Number
Normal Operation
Under normal operation, the quarter window control switch, quarter window close relay and quarter window open relay receive power from the accessory delay relay through circuit CBP41 (BU). Ground is provided to the quarter window close relay and quarter window open relay through circuit GD151 (BK/GN). Ground is provided to the quarter window control switch through GD138 (BK/WH). The quarter window control switch activates the quarter window open relay by supplying a ground input through circuit CPW26 (BU/BN) and activates the quarter window close relay by supplying a ground input through circuit CPW25 (YE/BU). When the quarter window open relay is activated, power is supplied to the LH and RH quarter window motors through circuit CPW27 (GN) and ground through circuit CPW28 (WH/BN) through the quarter window close relay circuit GD151 (BK/GN) to operate the quarter windows open. When the quarter window close relay is activated, power is supplied to the LH and RH quarter window motors through circuit CPW28 (WH/BN) and ground through circuit CPW27 (GN) through the quarter window open relay circuit GD151 (BK/GN) to operate the quarter windows closed.
This pinpoint test is intended to diagnose the following:
- Fuse
- Quarter window close relay
- Quarter window open relay
- Wiring, terminals or connectors
- Quarter window control switch
- Rear quarter window regulator motor
PINPOINT TEST H: THE LEFT OR RIGHT POWER WINDOW IS INOPERATIVE - REAR VENT 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.
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H1 CHECK THE VENT WINDOW OPERATION
- Attempt to operate the vent windows while observing both LR and RR vent window operation.
- Are both the LH and RH vent windows inoperative?
Yes
GO to H2.
No
GO to H8.
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H2 CHECK FOR GROUND INPUT TO THE VENT WINDOW OPEN AND CLOSE RELAYS
- Disconnect: Quarter Window Open Relay and Quarter Window Close Relay.
- While holding the quarter window control switch in the close position, measure the resistance between quarter window close relay pin 1, circuit CPW25 (YE/BU), harness side and ground.
- While holding the quarter window control switch in the open position, measure the resistance between quarter window open relay pin 2, circuit CPW26 (BU/BN), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to H5.
No
GO to H3.
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H3 CHECK FOR GROUND AT THE VENT WINDOW SWITCH
- Disconnect: Overhead Console Switch C930.
- Measure the resistance between quarter window control switch C930-12, circuit GD138 (BK/WH), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to H4.
No
REPAIR circuit GD138 (BK/WH) for an open. TEST the system for normal operation.
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H4 CHECK CIRCUITS CPW25 (YE/BU) AND CPW26 (BU/BN) FOR AN OPEN
- Measure the resistance between power vent window close relay pin 1, circuit CPW25 (YE/BU), harness side and power vent window switch C930-9, circuit CPW25 (YE/BU), harness side.
- Measure the resistance between power vent window open relay pin 2, circuit CPW26 (BU/BN), harness side and power vent window switch C930-4, circuit CPW26 (BU/BN), harness side.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new vent power window switch. REFER to Window Control Switch Service and Repair. TEST the system for normal operation.
No
REPAIR the open circuit CPW25 (YE/BU) or CPW26 (BU/BN) for an open. TEST the system for normal operation.
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H5 CHECK THE POWER VENT WINDOW OPEN AND CLOSE RELAY
- Carry out the relay component test on the power vent window open and close relays.
Refer to Wiring Diagrams for component testing. Diagrams By Number
- Did the power vent window open and close relay pass the component test?
Yes
GO to H6.
No
INSTALL a new relay. TEST the system for normal operation.
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H6 CHECK FOR POWER TO THE VENT WINDOW OPEN AND CLOSE RELAYS
- Ignition ON.
- Measure the voltage between quarter window open relay, harness side and ground.
- Pin 1, circuit CBP41 (BU)
- Pin 5, circuit CBP41 (BU)
- Measure the voltage between quarter window close relay, harness side and ground.
- Pin 2, circuit CBP41 (BU)
- Pin 5, circuit CBP41 (BU)
- Is the voltage greater than 10 volts?
Yes
GO to H7.
No
VERIFY Smart Junction Box (SJB) fuse 41 (15A) is OK. If OK, REPAIR circuit CBP41 (BU) for an open. 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. TEST the system for normal operation. Diagrams By Number
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H7 CHECK CIRCUIT GD151 (BK/GN) FOR AN OPEN
- Ignition OFF.
- Measure the resistance between quarter window open relay and close relay, harness side and ground.
- Pin 4, circuit GD151 (BK/GN)
- Is the resistance less than 5 ohms?
Yes
GO to H8.
No
REPAIR circuit GD151 (BK/GN) for an open. TEST the system for normal operation.
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H8 CHECK THE MOTOR CIRCUITS
- Ignition OFF.
- Disconnect: Power Vent Window Motor C4047 (LH) or C4090 (RH).
- Measure the resistance between power vent window open relay pin 3, circuit CPW27 (GN), harness side and inoperative power vent window motor:
- (RH) C4090-1, circuit CPW27 (GN).
- (LH) C4047-2, circuit CPW27 (GN).
- Measure the resistance between power vent window close relay pin 3, circuit CPW28 (WH/BN), harness side and power vent window motor:
- (RH) C4090-2, circuit CPW28 (WH/BN).
- (LH) C4047-1, circuit CPW28 (WH/BN).
- Is the resistance less than 5 ohms?
Yes
INSTALL a new power vent window regulator motor. REFER to Window Regulator Motor - Rear Quarter Service and Repair. TEST the system for normal operation.
No
REPAIR circuit(s). TEST the system for normal operation.
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