Steering Column Lock
The Steering Column Lock Module (SCLM) controls the steering wheel theft deterrent lock function, which allows the column to be electronically locked. When a valid key is used to start the vehicle, the BCM recognizes this and will send the encrypted password to the SCLM. The SCLM will compare its own stored password to the encrypted password sent by the BCM. If the data matches, the steering column will be unlocked.
In order for the steering column to be locked the SCLM has to see 3 inputs.
- The BCM power mode is OFF.
- The vehicle is stationary based on zero speed reported from all ABS wheel speed sensors.
- The driver or passenger door is opened reported by the PEPS module.
When the SCLM receives these inputs, the steering column will be locked.
The SCLM monitors the column lock system and will set DTC codes when the module detects malfunctions within the system. When a malfunction occurs the driver information center (DIC) will display the Service Column Lock Now message indicating DTC codes are set within the SCLM.
Driver Safety
The steering wheel and column has safety features to protect the driver. The following components may be mounted on or near the steering column
Energy-Absorbing Steering Column: The energy-absorbing steering column compresses in the event of a front-end collision, which reduces the risk of injury to the driver. The energy-absorbing feature, collapsible steering shaft, and break away mounting features help reduce the injury in the event of an accident.
Heated steering wheel
The system for heating the steering wheel comprises a heated steering wheel, a steering wheel switch and a control module for steering wheel heating. The heated steering wheel has heating elements which cannot be serviced, as well as a temperature sensor. The heating elements and sensor are positioned to the left and right of the outer diameter of the steering wheel. The switch is located in the left steering wheel control. The steering wheel heating control module is located beneath the center hub of the steering wheel.
When this switch is depressed, the contact's signal circuit is grounded and the control module enables the heating. The system is activated until the driver switches it off. Normal operating temperature is 32°C (89, 6°F). It takes about 3 - 4 minutes for the system to reach normal operating temperature. It takes longer to heat the steering wheel if the temperature in the vehicle is below -21°C (-5, 8°F). The built-in temperature sensor sends input data to the control unit in order to limit the temperature to normal operating temperature. The system for steering wheel heating cannot be activated if the temperature is 32°C (89, 6°F) or above.
Looseness in Steering Column
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you review the Steering Wheel and Column Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Steering Wheel and Column |
| 2 | Verify that the steering column is loose. Is the steering column loose? | Go to Step 3 | System OK |
| 3 | Inspect the steering column mounting features for the following conditions: The steering column mounting fasteners are loose. The steering column mounting features are sheared. Are the steering column mounting features loose? | Go to Step 5 | Go to Step 4 |
| 4 | Inspect the upper and/or lower bearings for looseness. Are any of the bearings worn or loose? | Go to Step 6 | Go to Step 7 |
| 5 | NOTE: If the steering column mounting feature is damaged or sheared, replace the steering column. Refer to Steering Column Replacement . Tighten the steering column mounting fastener to specifications. Refer to FASTENER TIGHTENING SPECIFICATIONS .Did you complete the repair? | Go to Step 7 | |
| 6 | NOTE: If the steering column upper and/or lower bearings are not serviceable, replace the steering column. Refer to Steering Column Replacement . Replace the upper and/or lower bearings, if serviceable.Did you complete the repair? | Go to Step 7 | |
| 7 | Operate the steering column in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
| NOTE |
|---|
| If the steering column mounting feature is damaged or sheared, replace the steering column. Refer to Steering Column Replacement . |
| NOTE |
|---|
| If the steering column upper and/or lower bearings are not serviceable, replace the steering column. Refer to Steering Column Replacement . |
Symptoms - Steering Wheel and Column
Review the system description and operation in order to familiarize yourself with the system functions. Refer to STEERING WHEEL AND COLUMN DESCRIPTION AND OPERATION .
Steering Column Tilt Function Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you review the Steering Wheel and Column Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Steering Wheel and Column |
| 2 | Verify that the steering column tilt function is inoperative. Does the steering column tilt function operate normally? | System OK | Go to Step 3 |
| 3 | If equipped, verify that the following components are not seized or corroded: Tilt pivot pins Tilt head lock shoes Are the components seized or corroded? | Go to Step 7 | Go to Step 4 |
| 4 | Inspect the tilt pivot pins for binding. Are the tilt pivot pins binding? | Go to Step 8 | Go to Step 5 |
| 5 | Inspect for a weak or broken steering column tilt spring. Is the steering column tilt spring weak or broken? | Go to Step 9 | Go to Step 6 |
| 6 | Inspect the steering column wiring harness routing for tightness. Was the steering column wiring harness routed correctly? | Go to Step 11 | Go to Step 10 |
| 7 | Replace the steering column. Refer to Steering Column Replacement . Did you complete the repair? | Go to Step 11 | |
| 8 | If serviceable, replace the pivot pins. If not serviceable replace the steering column. Refer to Steering Column Replacement . Did you complete the repair? | Go to Step 11 | |
| 9 | If serviceable, replace the tilt spring. Did you complete the repair? | Go to Step 11 | |
| 10 | Route the steering column wiring harness to the correct location. Did you correctly route the wiring harness? | Go to Step 11 | |
| 11 | Operate the steering column tilt function in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
High Telescoping Effort
| Checks | Action |
|---|---|
| The steering shaft assembly is bent or damaged. | If necessary, replace the steering column. Refer to Steering Column Replacement . |
Correction
- 01 - Replacement
- 02 - Removal - Refit
- 03 - Renovate
- 04 - Paint
- 05 - Adjust
- 06 - Change comp. unit
- 07 - Lubricate - Clean - Polish
- 08- Check/Fault search
- 09 - Expose
- 10 - Install new
- 11 - Transfer