Pinpoint Test U : The LH-RH Turn Signal, High Beam Or Fog Lamp Indicator Is Never Or Always On: Notes

WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation and Fault Conditions

See LH-RH Turn Signal Indicator, High Beam Indicator and Fog Lamp Indicator. REFER to: INSTRUMENT PANEL CLUSTER (IPC) - SYSTEM OPERATION AND COMPONENT DESCRIPTION

If the turn indicator command, headlamp high beam indicator request or fog lamp indicator request message is missing for less than 2 seconds, the IPC defaults the turn signals, high beam or fog lamp indicator to its last state (on or off) based upon the last known good message received.

If the turn indicator command, headlamp high beam indicator request or fog lamp indicator request message is missing for 2 seconds or longer, the IPC sets DTC U0140:00 in continuous memory and defaults the turn signals, high beam or fog lamp indicator off.

Possible Sources

Turn signal concern
High beam concern
Fog lamp concern
BCM
IPC