Notes On Intermittents

Check for loose or poor connection of the power circuit, ground circuit and the data circuits to the LSP. Return to "LIGHTING SYSTEM CHECK", see LIGHTING SYSTEM CHECK .

NOTE: The following numbered steps refer to circled numbers on diagnostic chart. See Fig 1 . For circuit identification, see Fig 2 .

If you were not directed here from LIGHTING CHART A-1: L - CODE DIAGNOSIS , then misdiagnosis could result.
If code B411 is also set, then a loss of voltage on circuit 840 is the cause.
This checks for voltage on circuit 840, the supply for the LSP.
This checks the data line for proper connection to the LSP.

Fig 1: Identifying DTC L110: Left Switch Pod (LSP) Communication Failure Flow Chart

Courtesy of GENERAL MOTORS CORP.

Fig 2: Identifying DTC L110: Left Switch Pod (LSP) Communication Failure Flow Chart Circuit

Courtesy of GENERAL MOTORS CORP.