For 1990-2009 cars

### 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 Descriptor

DTC B2875 01: Tilt Down Switch Circuit Short to Battery

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Steering Column Tilt Up Switch Signal | 1 | 1 | B2870 01 | --
Steering Column Tilt Down Switch Signal | 1 | 1 | B2875 01 | --
Steering Column Telescope Reverse Switch Signal | 2 | 2 | B2855 01 | --
Steering Column Telescope Forward Switch Signal | 2 | 2 | B2850 01 | --
1. Tilt Malfunction 2. Telescope Malfunction

### Circuit Description

The memory seat module (MSM) receives voltage inputs from the tilt/telescope switch based on the position of the switch. The MSM then supplies battery voltage and a ground to the tilt or telescope motor control circuits depending on which direction of movement is requested.

### Conditions for Running the DTC

The ignition ON.

### Conditions for Setting the DTC

The MSM detects a tilt down switch input for more than 30 consecutive seconds after down movement of the motor has stopped.

### Action Taken When the DTC Sets

• | The tilt motor will be deactivated.

• | Memory recall functions will be disabled.

### Conditions for Clearing the DTC

• | A current DTC will clear when the failed switch input is no longer active.

• | A history DTC will clear after 100 ignition cycles.

### Diagnostic Aids

• | An intermittently stuck tilt switch may cause this DTC to set.

• | The tilt telescopic steering column features such as the power tilt/telescope switch, tilt/telescope actuator, and tilt/actuator assembly are internal to the steering column. Replacement of these items is done by replacing the complete steering column.

### Reference Information

#### Schematic Reference

Tilt/Telescoping Steering Column Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Steering Wheel and Column Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for Scan Tool Information

### Circuit/System Verification

Ignition ON, view the scan tool Tilt Down Switch parameter while cycling the tilt/telescope switch between the neutral and TILT DOWN position. The parameter should change between Active and Inactive.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the inline connector X201 of the tilt/telescope switch.
2. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground.

⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

3. Verify the scan tool Tilt Down Switch parameter is Inactive.

⇒ | If not the specified value, test the signal circuit terminal 6 for a short to voltage. If the circuit tests normal, replace the MSM.

4. Install a 3A fused jumper wire between the signal circuit terminal 6 and the B+ circuit terminal 1. Verify the scan tool Tilt Down Switch parameter is Active.

⇒ | If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.

5. If all circuit test normal, test or replace the steering column.

### Component Testing

#### Tilt/Telescope Switch

1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.
2. Test for infinite resistance between the following terminals with the switch in the neutral position:

• | B+ terminal 1 and signal terminal 5

• | B+ terminal 1 and signal terminal 6

• | B+ terminal 1 and signal terminal 2

• | B+ terminal 1 and signal terminal 3

⇒ | If less than the specified range, replace the steering column.

3. Test for less than 1 ohm between the B+ terminal 1 and the signal terminal 2 with the switch in the TILT UP position.

⇒ | If greater than the specified range, replace the steering column.

4. Test for less than 1 ohm between the B+ terminal 1 and the signal terminal 6 with the switch in the TILT DOWN position.

⇒ | If greater than the specified range, replace the steering column.

5. Test for less than 1 ohm between the B+ terminal 1 and the signal terminal 5 with the switch in the TELESCOPE OUT position.

⇒ | If greater than the specified range, replace the steering column.

6. Test for less than 1 ohm between the B+ terminal 1 and the signal terminal 3 with the switch in the TELESCOPE IN position.

⇒ | If greater than the specified range, replace the steering column.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Steering Column Replacement

• | Control Module References for MSM replacement, setup, and programming