GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2004 🢒 LeSabre 🢒 DTC 🢒 DTC B2823-B3574

Circuit Description

The IPC monitors the driver information center (DIC) switch signal circuits in order to perform various functions. The DIC switch contains 2-5 active low momentary switches, depending on option content. The IPC detects a switch activation when the signal circuit is low.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

B2823-Base IPC Only

The IPC detects that the trip odometer reset switch signal circuit is low for greater than 15 seconds.

B2828-Uplevel IPC Only

The IPC detects that the DIC fuel info switch signal circuit is low for greater than 15 seconds.

B2833-Uplevel IPC Only

The IPC detects that the DIC gage info switch signal circuit is low for greater than 15 seconds.

B2838-Uplevel IPC Only

The IPC detects that the DIC reset switch signal circuit is low for greater than 15 seconds.

B2843

The IPC detects that the metric conversion switch signal circuit is low for greater than 15 seconds.

B2848-Uplevel IPC Only

The IPC detects that the trip odometer reset switch signal circuit is low for greater than 15 seconds.

Action Taken When the DTC Sets

The IPC ignores the malfunctioning switch circuit.

Conditions for Clearing the DTC
    • The current DTC becomes history when the fault is no longer present.
    • The history DTC clears after 50 malfunction free ignition cycles.
    • The IPC receives a clear code command from the scan tool.

Step

Action

Yes

No

Schematic Reference: Instrument Cluster Schematics

1

Did you perform the Instrument Cluster Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the following parameters in the IPC inputs list:
    4. • Display Fuel Switch (Uplevel)
    • Display Gauge Switch (Uplevel)
    • English/Metric Sw. (Uplevel and Base)
    • Odo/Trip Switch (Uplevel)
    • Reset Switch (Uplevel)
    • Trip Reset Switch (Base)

Does the scan tool display Off or Inactive for all parameters?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3
  1. Turn OFF the ignition.
  2. Disconnect the driver information center (DIC) switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the suspect switch parameter that displayed On or Active.

Does the scan tool display Off or Inactive?

Go to Step 6

Go to Step 4

4

Test the signal circuit of the suspect switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 5

5

Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 7

6

Inspect for poor connections at the harness connector of the DIC switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 8

7

Replace the IPC. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

Go to Step 9

--

8

Replace the DIC switch. Refer to Driver Information Display Switch Replacement .

Did you complete the replacement?

Go to Step 9

--

9
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK