GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 XLR 🢒 Steering 🢒 Steering Wheel and Column 🢒 DTC B2853, B2858, B2873, or B2878

Circuit Description

The driver position module (DPM) receives ground inputs from contacts inside the tilt/telescoping switch. The DPM then supplies battery voltage to the tilt motor up or down circuit, or, the telescope motor in or out circuit depending on which direction of movement is requested. Both motors are reversible and the circuits are simply reversed to accomplish movement in opposite directions.

Conditions for Running the DTC

The DPM is ON.

Conditions for Setting the DTC

The DPM detects a switch input for more than 30 consecutive seconds after movement of the motor in the requested direction has stopped.

Action Taken When the DTC Sets
    • The motor that is being driven by the failed switch will be deactivated.
    • Memory recall functions will be disabled.

Conditions for Clearing the DTC
    • The DTC will clear from current status when the failed switch input is no longer active.
    • Use a scan tool.

Diagnostic Aids

An intermittently stuck switch can cause this DTC to set. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Step

Action

Yes

No

Schematic Reference: Tilt/Telescoping Steering Column Schematics

Connector End View Reference: Steering Wheel and Column Connector End Views

1

Did you perform the Vehicle Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Using the scan tool, observe the current diagnostic trouble code list in the DTC information list.

Is DTC B2853, B2858, B2873 or B2878 displayed as current?

Go to Step 3

Go to Diagnostic Aids

3
  1. Turn OFF the ignition.
  2. Disconnect the tilt/telescoping switch harness connector.
  3. Turn ON the ignition, with the engine OFF.
  4. Using the scan tool, observe the current DTC list in the DTC information list.

Is DTC B2853, B2858, B2873 or B2878 displayed as current?

Go to Step 4

Go to Step 6

4

Test the tilt/telescope switch circuits for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Do you find and correct the condition?

Go to Step 8

Go to Step 5

5

Inspect for poor connections at the harness connector of the tilt/telescoping switch.

Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 7

6

Replace the tilt/telescoping switch. Refer to Telescope Actuator Switch Replacement .

Did you complete the replacement?

Go to Step 8

--

7

Important:: Perform the setup procedure for the DPM.

Replace the DPM. Refer to Memory Seat Control Module Replacement .

Did you complete the replacement?

Go to Step 8

--

8

Perform the Steering Column Control Module Programming. Refer to Control Module Setup

Did you complete the action?

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