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, Headlamps/Autolamps for schematic and connector information. [1][2]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 (Smart Junction Box) detects a request for the flash-to-pass, the SJB (Smart Junction Box) provides voltage to the high beam headlamps.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Multifunction switch

- SJB (Smart Junction Box)

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.

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

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. TEST the system for normal operation.

No
REMOVE the jumper wire. GO to F3.

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

- Disconnect: SJB (Smart Junction Box) C2280B.

- Measure the resistance between the multifunction switch C202-4, circuit CLF27 (GN/BN), harness side and the SJB (Smart Junction Box) 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.

F4 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION

- Disconnect all the SJB (Smart Junction Box) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the SJB (Smart Junction Box) 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 (Smart Junction Box). 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.