Pinpoint Test A: All Power Windows Are Inoperative

Glass, Frames and Mechanisms

Pinpoint Tests

Pinpoint Test A: All Power Windows are Inoperative - MKX

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

Normal Operation

Under normal operation, the LH front power window control switch receives power from the accessory delay relay through circuits CBP41 (BU) and CBP47 (GN/BU). The accessory delay relay is located within the Smart Junction Box (SJB). The LH and RH front window motors each have their own separate power feeds and grounds and do not share any circuits with the LH or RH rear window motors except through the LH front window control switch.

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



PINPOINT TEST A: ALL POWER WINDOWS ARE INOPERATIVE - MKX

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.

-------------------------------------------------
A1 CHECK CIRCUITS CBP41 (BU) AND CBP47 (GN/BU) FOR VOLTAGE


- Disconnect: LH Front Window Control Switch C535A.
- Disconnect: LH Front Window Control Switch C535B.
- Ignition ON.
- Measure the voltage between LH front window control switch C535A-3, circuit CBP41 (BU), harness side and ground; and between LH front window control switch C535B-3, circuit CBP47 (GN/BU), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
INSTALL a new LH front window control switch. REFER to Window Control Switch Service and Repair. TEST the system for normal operation.

No
VERIFY SJB fuse 41 (15A) and circuit breaker 47 (30A) are OK. If OK, GO to A2.

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.

-------------------------------------------------
A2 CHECK CIRCUITS CBP41 (BU) AND CBP47 (GN/BU) FOR AN OPEN


- Ignition OFF.
- Disconnect: SJB C2280D.
- Measure the resistance between LH front window control switch C535A-3, circuit CBP41 (BU), harness side and SJB C2280D-16, circuit CBP41 (BU), harness side; and between LH front window control switch C535B-3, circuit CBP47 (GN/BU), harness side and SJB C2280D-32, circuit CBP47 (GN/BU), harness side.




- Is the resistance less than 5 ohms?

Yes
Go To Pinpoint Test L to diagnose the accessory delay relay circuit. Pinpoint Test L: The Delayed Accessory Is Inoperative

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

-------------------------------------------------