B3564

Refer to 310 Cell 81 DIC Switch (Uplevel)

Diagnostic Chart:

CIRCUIT DESCRIPTION
The instrument panel cluster (IPC) contains switch circuits that allow certain functions to be performed when depressed. The IPC monitors these circuit voltage levels and detects when a certain button has been depressed by the voltage drop. If the voltage is not within a range for a pre determined amount of time, the IPC detects the malfunction and sets the DTC.

CONDITIONS FOR RUNNING THE DTC
^ The IPC must be powered up
^ The IPC detects a single failure

CONDITIONS FOR SETTING THE DTC
The IPC detects the mode switch input low (stuck or shorted to ground) for more than 15 seconds.

ACTION TAKEN WHEN THE DTC SETS
The mode switch will be disabled (ignored), therefore the IPC will not be capable of providing the correct status of the input when requested through the ALDL.

CONDITIONS FOR CLEARING THE MIL/DTC
The IPC does not detect a failure during the diagnostic self test.

DIAGNOSTIC AIDS
The IPC will store the code as current only as long as the failure exists. An intermittent failure will be stored as a history DTC.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
4. As the typical scan tool value is OFF, this step tests the instrument panel cluster for a short or a sticking remote switch.