CTS Sedan AWD V6-3.0L (2010)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the X3 harness connector at the MSM.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.
‹› If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
3. Ignition OFF, connect the X3 harness connector at the MSM.
4. Ignition ON, observe the scan tool Radio Driver Heated Seat Sw. parameter while pressing the driver HEATED seat switch. The readings should
change between Inactive and Active.
‹› If not the specified value, replace the radio/HVAC control panel.
5. Observe the scan tool Radio Pass. Heated Seat Sw. parameter while pressing the passenger HEATED seat switch. The readings should change
between Inactive and Active.
‹› If not the specified value, replace the radio/HVAC control panel.
6. If the scan tool readings are normal, there are no DTCs set, and the driver and/or passenger heated seat is inoperative, replace the MSM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble
Code Tests and Associated Procedures/Verification Tests and Procedures) after completing the diagnostic procedure.
*
Radio Control Assembly Replacement (with Navigation Display) (See: Accessories and Optional Equipment/Radio, Stereo, and Compact
Disc/Radio/Stereo/Service and Repair/Radio Control Assembly Replacement (with Navigation Display))Radio Control Assembly Replacement
(without Navigation Display) (See: Accessories and Optional Equipment/Radio, Stereo, and Compact Disc/Radio/Stereo/Service and
Repair/Radio Control Assembly Replacement (without Navigation Display))
*
Control Module References (See: Testing and Inspection/Programming and Relearning) for MSM replacement, setup, and programming
