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. 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 flash-to-pass, the SJB (Smart Junction Box) provides voltage to the high beam headlamps.

The flash-to-pass feature is unique for High Intensity Discharge (HID) equipped vehicles. If the low beams are off when flash-to-pass is requested, the HID (High Intensity Discharge) ballasts and the shutters within the headlamps are activated for approximately 0.5 seconds. If the low beams are on when 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 (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.

- Place the headlamp switch in the HEADLAMPS ON position.

- 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

- Place the headlamp switch in the HEADLAMPS OFF position.

- 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.