System Check Chart C-2

You have been directed here because the Climate Cntrol Pnel (CCP) does not respond to at least one button.

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

For the CCDIC to respond to key board buttons, it must know that the ignition switch is in the "RUN" position.
This test compares signal voltages between the ALDL and the CCDIC. If voltage is the same at both locations, the circuit appears good.

Fig 1: Identifying Chart C-2 Flow Chart

Courtesy of GENERAL MOTORS CORP.

Fig 2: Identifying Chart C-2 Flow Chart Circuit

Courtesy of GENERAL MOTORS CORP.