Operation CHARM: Car repair manuals for everyone.

Test W: The Lamp Out Indicator Is Never/Always On

PINPOINT TEST W: THE LAMP OUT INDICATOR IS NEVER/ALWAYS ON


W1-W4:






Normal Operation
The smart junction box (SJB) monitors and controls the output to the exterior lamps. When a lamp is not functioning, the SJB sends a command to the instrument cluster over the communication network to illuminate the lamp out indicator.

Possible Causes
- SJB
- instrument cluster