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

Headlamps

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

Normal Operation

The Body Control Module (BCM) sends a voltage signal to the multifunction switch to monitor for a flash-to-pass feature request. The multifunction switch routes the voltage signal to ground when placed in the FLASH-TO-PASS position. When the headlamps are on and the BCM (Body Control Module) detects a request for the flash-to-pass feature, the BCM (Body Control Module) activates the high beams.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Multifunction switch

- BCM (Body Control Module)

PINPOINT TEST E : 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.

E1 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 beams illuminate?

Yes
GO to E2.

No
GO to Pinpoint Test B Pinpoint Test B: One Or Both High Beams Are Inoperative.

E2 BYPASS THE MULTIFUNCTION SWITCH

- Place the headlamp switch in the OFF position.

- Ignition OFF.

- Disconnect: Multifunction Switch C202A.

- Ignition ON.

- Connect a fused jumper wire between the multifunction switch C202A-5, circuit CLF27 (GN/BN), harness side and the multifunction switch C202A-9, circuit GD115 (BK/GY), 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 E3.

E3 CHECK THE FLASH-TO-PASS INPUT CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: BCM (Body Control Module) C2280E.

- Measure the resistance between the multifunction switch C202A-5, circuit CLF27 (GN/BN), harness side and the BCM (Body Control Module) C2280E-22, circuit CLF27 (GN/BN), harness side.





Is the resistance less than 5 ohms?

Yes
GO to E4.

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

E4 CHECK FOR CORRECT BCM (Body Control Module) OPERATION

- Disconnect all the BCM (Body Control Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the BCM (Body Control Module) 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 BCM (Body Control Module). 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.