B2823

Schematics:

Diagnostic Chart:

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

CONDITIONS FOR RUNNING THE DTC
The IPC and the trip reset switch must be active.

CONDITIONS FOR SETTING THE DTC
The IPC detects the trip reset switch input low (grounded) for more than 15 continuous seconds.

ACTION TAKEN WHEN THE DTC SETS
The IPC will disable (ignore) the trip reset switch, therefore the correct status of the switch will not be known when requested through the DLC.

CONDITIONS FOR CLEARING THE DTC
The IPC does not detect a failure for two passes through the self test.

DIAGNOSTIC AIDS
The PC 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. Tests for a short to ground in the signal circuit.