B2394

B2394-FLASH TO PASS/OPTICAL HORN SWITCH CIRCUIT STUCK



Theory of Operation

The Flash To Pass/Optical Horn Switch is integral to the Left Multifunction Switch. Switch status is broadcast from the Left Multifunction Switch to the Cluster via the LIN Bus.

- When Monitored:
With the Ignition on.

- Set Condition:
When the Cluster detects a faulty Flash To Pass/Optical Horn Switch message on the LIN Bus.





CHECK FOR AN ACTIVE DTC

NOTE: Before proceeding with this diagnostic procedure, verify the Left Multifunction Switch harness connector is properly seated and verify proper pin terminal tension. A loose connection at this connector may cause this DTC to set.

1. Turn the ignition on.
2. Turn the Headlamps on.
3. Actuate the Flash To Pass/Optical Horn Switch on and off three times.
4. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Replace the Left Multifunction Switch in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Verification Tests

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.