Pinpoint Test F: The Flash-To-Pass Feature Is Inoperative

Headlamps

Pinpoint Test F: The Flash-To-Pass Feature Is Inoperative

Refer to Wiring Diagram Set 85 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid), Headlamps/Autolamps for schematic and connector information. Diagrams By Number

Normal Operation

The Smart Junction Box (SJB) sends a voltage signal to the multifunction switch for the flash-to-pass request. When the multifunction switch is placed in the FLASH-TO-PASS position, the voltage signal is routed to ground. When the SJB detects a request for the flash-to-pass, the SJB provides voltage to the high beam headlamps.

The flash-to-pass feature is unique for Milan. If the low beams are off when the flash-to-pass is requested, the low beams and the shutters (within the headlamps) are activated for approximately 0.5 second. If the low beams are on when the flash-to-pass is requested, the shutters (within the headlamps) are activated as long as the multifunction switch is held in the FLASH-TO-PASS position.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Multifunction switch
- SJB


PINPOINT TEST F: THE FLASH-TO-PASS FEATURE IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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F1 VERIFY THE HIGH BEAM HEADLAMP OPERATION

- Ignition ON.
- Place the headlamp switch in the HEADLAMPS ON position.
- Place the multifunction switch in the HIGH BEAM position while observing the headlamps.
- Do the high beam headlamps illuminate?

Yes
GO to F2.

No
GO to Pinpoint Test A. Pinpoint Test A: Both High Beams Are Inoperative

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F2 CHECK THE MULTIFUNCTION SWITCH

- Ignition OFF.
- Disconnect: Multifunction Switch C202.
- Connect a fused jumper wire between the multifunction switch C202-4, circuit CLF27 (GN/BN), harness side and the multifunction switch C202-8, circuit GD116 (BK/VT), harness side.




- Do the high beams illuminate?

Yes
REMOVE the jumper wire. INSTALL a new multifunction switch. REFER to Steering Column Switches Steering Column Multifunction Switch. TEST the system for normal operation.

No
REMOVE the jumper wire. GO to F3.

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F3 CHECK THE FLASH-TO-PASS REQUEST INPUT CIRCUIT FOR AN OPEN

- Disconnect: SJB C2280b.
- Measure the resistance between the multifunction switch C202-4, circuit CLF27 (GN/BN), harness side and the SJB C2280b-43, circuit CLF27 (GN/BN), harness side.




- Is the resistance less than 5 ohms?

Yes
GO to F4.

No
REPAIR circuit CLF27 (GN/BN) for an open. TEST the system for normal operation.

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F4 CHECK FOR CORRECT SJB OPERATION

- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new SJB. REFER to Multifunction Electronic Modules Service and Repair. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

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