DTC B2838, B3564, B3569, or B3752. Buick Rendezvous

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2007 🢒 Rendezvous - FWD 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 DTC B2838, B3564, B3569, or B3752

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B2838: Driver Information Center (DIC) Reset Switch Circuit Low

DTC B3564: Driver Information Center (DIC) Mode Switch Circuit Low

The instrument panel cluster (IPC) monitors the driver information center (DIC) mode switch and the DIC reset switch in order to perform certain functions. The IPC detects a switch activation when the signal circuit is low.

Conditions for Running the DTC

The IPC must have normal operating battery voltage.

Conditions for Setting the DTC

B2838

The IPC detects that the reset switch signal circuit is low for greater than 60 seconds.

B3564

The IPC detects that the mode switch signal circuit is low for greater than 60 seconds.

Action Taken When the DTC Sets

The IPC ignores the DIC mode switch or the DIC reset switch.

Conditions for Clearing the DTC

•	A current DTC B3564 or B2838 will clear after a complete ignition cycle if the fault is no longer present.

•	The IPC receives the clear code command from the scan tool.

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 B3564 or B2838.

•	If DTC B3564 or B2838 is set only in history, press and release the DIC mode B3564 or reset B2838 switch several times in order to verify the customer concern.

Reference Information

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

Displays and Gages Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Scan Tool Data List

Circuit/System Testing

Ignition OFF, disconnect the harness connector at the driver information center (DIC) switch.
Ignition ON, verify the scan tool DIC Reset Button parameter is Off.

⇒	If not Off, test the DIC switch signal circuit for a short to ground. If the circuit tests normal, replace the IPC.

Verify the scan tool DIC Mode Button parameter is Off.

⇒	If not Off, test the DIC select menu switch signal circuit for a short to ground. If the circuit tests normal, replace the IPC.

If all circuits test normal, test or replace the DIC switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Driver Information Display Switch Replacement

•	Control Module References for IPC replacement, setup, and programming