2010 Cadillac CTS Sedan AWD V6-3.6L Page 687
Reference Information
Schematic Reference
Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool yaw rate and longitudinal/ lateral accelerometer sensor parameter. The reading should be the same on all sensors
when driving in a straight line at a constant speed greater than 20 km/h (13 mph), and will vary as the vehicle changes direction.
Circuit/System Testing
1. Verify that DTC U1826 or U1827 and not set.
瀚慖f DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble
Code (DTC) List - Vehicle).
2. Verify the yaw/lateral accelerometer sensor is mounted properly.
瀚慖f not mounted properly, refer to Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction
Control/Antilock Brakes / Traction Control Systems/Yaw Rate Sensor/Service and Repair).
3. Ignition OFF, disconnect the harness connector at the yaw/lateral accelerometer sensor.
4. Ignition OFF, wait 1 minute, test for less than 10 ohm between the low reference circuit terminal 6 and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuits test normal, replace the EBCM.
5. Ignition ON, test for B+ between the ignition voltage circuit terminal 1 and ground.
瀚慖f not within the specified range, test the ignition voltage circuit for a short to ground or open/high resistance. If the circuits test normal,
replace the EBCM.
6. If all circuits test normal, replace the yaw/lateral accelerometer sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction
Control Systems/Yaw Rate Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup and programming
C0196
DTC C0186, C0196, or C0287
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
