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




Headlamps


Pinpoint Tests

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

Refer to wiring Diagram Set 85, Headlamps/Autolamps for schematic and connector information. Diagrams By Number

Normal Operation

The multifunction switch is supplied voltage from the Smart Junction Box (SJB) through circuit SBP23 (WH/RD). When the multifunction switch is placed in the FLASH-TO-PASS position, the voltage is routed to the high beam circuitry.

This pinpoint test is intended to diagnose the following:

- Fuse
- 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 CHECK THE HIGH BEAM OPERATION


- Ignition OFF.
- Place the headlamp switch in the HEADLAMPS ON position.
- Place the multifunction switch in the HIGH BEAM position.
- Do the high beams illuminate?

Yes
GO to F2.

No
Go To Pinpoint Test C. Pinpoint Test C: Both High Beams Are Inoperative

-------------------------------------------------
F2 CHECK FOR VOLTAGE TO THE MULTIFUNCTION SWITCH


- Place the headlamp switch in the OFF position.
- Disconnect: Multifunction Switch C202b.
- Measure the voltage between the multifunction switch C202b-6, circuit SBP23 (WH/RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
INSTALL a new multifunction switch. TEST the system for normal operation.

No
GO to F3.

-------------------------------------------------
F3 CHECK CIRCUIT SBP23 (WH/RD) FOR AN OPEN


- Disconnect: SJB C2280b.
- Measure the resistance between the multifunction switch C202b-6, circuit SBP23 (WH/RD), harness side and the SJB C2280b-1, circuit SBP23 (WH/RD), harness side.




- Is the resistance less than 5 ohms?

Yes
GO to F4.

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

-------------------------------------------------
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. 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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