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 detects a request for the flash-to-pass feature, the BCM activates the high beams.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Multifunction switch
- BCM
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.
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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
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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. REFER to Steering Column Switches Steering Column Multifunction Switch. TEST the system for normal operation.
No
REMOVE the jumper wire. GO to E3.
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E3 CHECK THE FLASH-TO-PASS INPUT CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: BCM C2280E.
- Measure the resistance between the multifunction switch C202A-5, circuit CLF27 (GN/BN), harness side and the BCM 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.
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E4 CHECK FOR CORRECT BCM OPERATION
- Disconnect all the BCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the BCM 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. REFER to Multifunction Electronic Modules Body Control Module (BCM). 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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