B3567

DTC B3567

DTC DESCRIPTOR

DTC B3567 01: Driver Information Center Select Switch Circuit
DTC B3567 07: Driver Information Center Select Switch Circuit




DIAGNOSTIC FAULT INFORMATION

IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection

CIRCUIT/SYSTEM DESCRIPTION
The driver information center (DIC) switch is a mutiplexed switch that functions as a DIC/dimmer switch. Battery power is provided to the DIC switch via the instrument panel cluster (IPC) with the DIC switch signal circuit pulled up to battery voltage in the IPC. The IPC also provides the DIC switch with a ground reference. The switch input to the cluster is pulled low or grounded when a switch is activated. The DIC switch is a momentary contact switch that connects a series of resistors in a resistor ladder format. The IPC monitors the DIC switch signal circuit to determine the DIC switch inputs. Each switch state, RESET, MENU, MAINT, INFO UP, INFO DOWN, corresponds to a certain resistance value. The IPC determines the switch state by the voltage drop across the resistors. A stuck switch or a short to battery sets a DTC.

CONDITIONS FOR RUNNING THE DTC
The ignition is in ACCESSORY or RUN.

CONDITIONS FOR SETTING THE DTC
- The IPC detects that the DIC switch is stuck.
- The IPC detects that the DIC switch signal circuit is shorted to battery.

ACTION TAKEN WHEN THE DTC SETS
The IPC ignores the DIC switch inputs.

CONDITIONS FOR CLEARING THE DTC
- The DTC becomes history when the conditions for setting the DTC are no longer present.
- The history DTC clears after 40 malfunction-free warm-up cycles.
- The powertrain control module (PCM)/engine control module (ECM) receives a clear code command from the scan tool.

DIAGNOSTIC AIDS
- When the DIC switches are stuck, only the Trip A/B switch functions correctly. When the Trip A/B switch is stuck, all other DIC switches function correctly.
- Only the DIC signal circuit can be diagnosed as shorted to battery.

CIRCUIT/SYSTEM TESTING
1. With the ignition ON, install a scan tool.
2. Activate and release the DIC switches.
3. With the scan tool observe the DIC information switch parameter in the IPC scan tool Data List.
- If the scan tool displays Active and Inactive simultaneously, check for a poor connection at the harness connector of the DIC switch.
4. With the ignition OFF, disconnect the DIC/Dimmer switch.
5. Connect a test lamp between the DIC switch signal and a good ground.
- If the test lamp illuminates, check the DIC switch signal circuits for a short to battery.
- If the circuit tests normal, replace the IPC.
- If the DIC switch signal circuits tests normal, replace the DIC switch.
- If the test lamp does not illuminate, replace the IPC.

REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Control Module References
- Driver Information Center Switch Replacement