2010 Cadillac CTS Sedan AWD V6-3.6L Page 526
1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.
2. Ignition ON, verify a test lamp illuminates between terminal 4 and ground.
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
3. Verify with the scan tool that the appropriate switch parameter is Inactive.
瀚慖f not the specified value, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Install a 3A fused jumper wire between the appropriate circuit terminal 1, 2, 3, or 5 and terminal 4. Verify with the scan tool that the
appropriate switch parameter is Active.
瀚慖f 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 tilt/telescope switch.
Component Testing
Tilt/Telescope Switch
1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.
2. Test for infinite resistance between terminals 1, 2, 3, and 5 with the switch in the neutral position:
瀚慖f less than the specified range, replace the tilt/telescope switch.
3. Test for less than 1 ohm between terminal 4 and terminals 1, 2, 3, and 5 with the switch in each appropriate position.
瀚慖f greater than the specified value, replace the tilt/telescope switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Steering Column Replacement (See: Steering and Suspension/Steering/Steering Column/Service and Repair/Steering Column Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning)for MSM replacement, setup, and programming
B2855
DTC B2850, B2855, B2870, or B2875
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category
DTC Descriptor
DTC B2850 01
- Telescope Forward Switch Circuit Short to Battery
DTC B2855 01
- Telescope Rearward Switch Circuit Short to Battery
DTC B2870 01
- Tilt Up Switch Circuit Short to Battery
DTC B2875 01
- Tilt Down Switch Circuit Short to Battery
Diagnostic Fault Information
