Pinpoint Test A: All Passenger Power Windows Are Inoperative - LH and RH Rear

Glass, Frames and Mechanisms

Pinpoint Tests

Pinpoint Test A: All Passenger Power Windows are Inoperative - MKZ, LH and RH Rear

Refer to Wiring Diagram Set 100 (Fusion/Milan/MKZ, Fusion Hybrid/Milan Hybrid), Power Windows for schematic and connector information. Diagrams By Number

Normal Operation

Under normal operation, the LH front power window control switch receives power through circuit CBP47 (GN/BU), which is the accessory delay relay output from the Smart Junction Box (SJB). When the LH front window lockout control switch is in the UNLOCK position, voltage is supplied to the LH and RH rear power window control switches through circuit CPW14 (VT/WH). Ground is supplied to the LH front window control switch through circuit GD126 (BK/WH).

This pinpoint test is intended to diagnose the following:
- Circuit breaker
- Wiring, terminals or connectors
- LH front window control switch



PINPOINT TEST A: ALL PASSENGER POWER WINDOWS ARE INOPERATIVE - MKZ, LH AND 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.

NOTE: Before performing this pinpoint test, make sure the LH front window lockout control switch is in the UNLOCK position.

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A1 CHECK REAR PASSENGER WINDOW VOLTAGE FEED TO LH FRONT WINDOW CONTROL SWITCH


- Disconnect: LH Front Window Control Switch C535B.
- Ignition ON.
- Measure the voltage between LH front window control switch C535B-3, circuit CBP47 (GN/BU), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A2.

No
VERIFY SJB circuit breaker 47 (30A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.

If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short Diagrams By Number. TEST the system for normal operation.

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A2 CHECK THE LH FRONT WINDOW CONTROL SWITCH GROUND


- Ignition OFF.
- Measure the resistance between LH front window control switch C535B-6, circuit GD126 (BK/WH), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
GO to A3.

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

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A3 CHECK THE LH FRONT WINDOW CONTROL SWITCH


- Carry out the LH front window control switch component test.

- Did the LH front window control switch pass the component test?

Yes
REPAIR circuit CPW14 (VT/WH) for an open. TEST the system for normal operation.

No
INSTALL a new LH front window control switch. REFER to Window Control Switch Service and Repair. TEST the system for normal operation.

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