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Pinpoint Test H: A Single Power Window is Inoperative - LH or RH Rear




Glass, Frames and Mechanisms

Pinpoint Test H: A Single Power Window is Inoperative - MKZ, LH or RH Rear

Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. [1][2]Diagrams By Number

Normal Operation

The LH and RH rear window control switches receive voltage from the master window control switch when the window lockout switch is set to the UNLOCK position. Ground is also provided to the LH and RH rear window control switches from the master window control switch. The LH and RH rear window control switches transfer power and ground to their respective rear window motors. Window direction is controlled by reversing polarity of the voltage and ground circuits being supplied to the window motor.

When operating the LH or RH rear window from the master window control switch, voltage and ground is sent from the LH front window control switch through the normally closed contacts within the LH or RH rear window control switch to operate the LH or RH rear window. 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:

- Wiring, terminals or connectors

- Window control switch

- Power window motor

PINPOINT TEST H : A SINGLE POWER WINDOW IS INOPERATIVE - MKZ, LH OR RH REAR

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.

H1 CHECK THE VOLTAGE TO THE LH OR RH REAR WINDOW CONTROL SWITCH

- Disconnect: Inoperative Rear Window Control Switch C701 (LH) or C819 (RH).

- Ignition ON.

- NOTE: Set the master window control lockout switch to the UNLOCK position.

Measure the voltage between the inoperative rear window connector and ground:
- for the RH rear window control switch, measure the voltage between RH rear window control switch C819-3, circuit CPW14 (VT/WH), harness side and ground.

- for the LH rear window control switch, measure the voltage between C701-3, circuit CPW14 (VT/WH), harness side and ground.






Is the voltage greater than 10 volts?

Yes
GO to H2.

No
REPAIR the circuit. TEST the system for normal operation.

H2 CHECK THE GROUNDS TO THE INOPERATIVE REAR WINDOW CONTROL SWITCH

- Ignition OFF.

- Measure the resistance between the inoperative window control switch and ground:
- for the RH rear window control switch, measure the resistance between RH rear window control switch C819-1, circuit CPW17 (BN/GN), harness side and ground; and between RH rear window control switch C819-6, circuit CPW18 (GY/VT), harness side and ground.

- for the LH rear window control switch, measure the resistance between LH rear window control switch C701-1, circuit CPW15 (YE), harness side and ground; and between LH rear window control switch C701-6, circuit CPW16 (BU/OG), harness side and ground.






Are the resistances less than 5 ohms?

Yes
GO to H4.

No
GO to H3.

H3 CHECK THE CIRCUITS TO THE INOPERATIVE REAR WINDOW CONTROL SWITCH FOR AN OPEN

- Ignition OFF.

- Disconnect: LH Front Window Control Switch C535B.

- For an inoperative LH rear power window, measure the resistance between master window control switch C535B-1, circuit CPW15 (YE) and LH rear window control switch C701-1, circuit CPW15 (YE), harness side; and between master window control switch C535B-2, circuit CPW16 (BU/OG) and LH rear window control switch C701-6, circuit CPW16 (BU/OG), harness side.





- For an inoperative RH rear power window, measure the resistance between master window control switch C535B-7, circuit CPW17 (BN/GN) and RH window control switch C819-1, circuit CPW17 (BN/GN), harness side; and between master window control switch C535B-8, circuit CPW18 (GY/VT) and RH rear window control switch C819-6, circuit CPW18 (GY/VT), harness side.





Are the resistances less than 5 ohms?

Yes
INSTALL a new master window control switch. REFER to Window Control Switch . TEST the system for normal operation.

No
REPAIR the circuit(s) for an open. TEST the system for normal operation.

H4 CHECK THE INOPERATIVE WINDOW CONTROL SWITCH

- Connect: Master Window Control Switch C535B.

- Ignition ON.

- For an inoperative LH rear window, connect a fused jumper wire between LH rear window control switch C701-2, circuit CPW21 (BN), harness side and LH rear window control switch C701-3, circuit CPW14 (VT/WH), harness side; and between LH rear window control switch C701-5, circuit CPW22 (GN/VT), harness side and LH rear window control switch C701-6, circuit CPW16 (BU/OG), harness side. The LH rear window should operate in the downward direction.

- For an inoperative RH rear window, connect a fused jumper wire between RH rear window control switch C819-2, circuit CPW23 (GY), harness side and RH rear window control switch C819-3, circuit CPW14 (VT/WH), harness side; and between RH rear window control switch C819-5, circuit CPW24 (WH/VT), harness side and RH rear window control switch C819-6, circuit CPW18 (GY/VT), harness side. The RH rear window should operate in the downward direction.





- For an inoperative LH rear window, connect a fused jumper wire between LH rear window control switch C701-2, circuit CPW21 (BN), harness side and LH rear window control switch C701-1, circuit CPW15 (YE), harness side; and between LH rear window control switch C701-5, circuit CPW22 (GN/VT), harness side and LH rear window control switch C701-3, circuit CPW14 (VT/WH), harness side. The LH rear window should operate in the upward direction.

- For an inoperative RH rear window, connect a fused jumper wire between RH rear window control switch C819-2, circuit CPW23 (GY), harness side and RH rear window control switch C819-1, circuit CPW17 (BN/GN), harness side; and between RH rear window control switch C819-5, circuit CPW24 (WH/VT), harness side and RH rear window control switch C819-3, circuit CPW14 (VT/WH), harness side. The RH rear window should operate in the upward direction.





Did the inoperative window operate correctly?

Yes
INSTALL a new master window control switch or RH rear window control switch. REFER to Window Control Switch . TEST the system for normal operation.

No
GO to H5.

H5 CHECK THE POWER WINDOW MOTOR CIRCUITS

- Ignition OFF.

- Disconnect: Inoperative Rear Window Motor C703 (LH) or C803 (RH).

- For an inoperative LH rear window, measure the resistance between LH rear window control switch C701-5, circuit CPW22 (GN/VT), harness side and LH rear window motor C703-1, circuit CPW22 (GN/VT), harness side.

- For an inoperative RH rear window, measure the resistance between RH rear window control switch C819-5, circuit CPW24 (WH/VT), harness side and RH rear window motor C803-1, circuit CPW24 (WH/VT), harness side.





- For an inoperative LH rear window, measure the resistance between LH rear window control switch C701-2, circuit CPW21 (BN), harness side and LH rear window motor C703-2, circuit CPW21 (BN), harness side.

- For an inoperative RH rear window, measure the resistance between RH rear window control switch C819-2, circuit CPW23 (GY), harness side and RH rear window motor C803-2, circuit CPW23 (GY), harness side.





Is the resistance less than 5 ohms?

Yes
INSTALL a new LH or RH rear window motor. REFER to Window Regulator Motor . TEST the system for normal operation.

No
REPAIR the circuit. TEST the system for normal operation.

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