2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 874
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Engine running, measure and record the voltage at the battery terminals.
2. Verify that the battery voltage is 12.6-15.0 V.
瀚慖f the battery voltage is not within the specified range, refer to Charging System Test (See: Starting and Charging/Testing and
Inspection/Component Tests and General Diagnostics/Charging System Test).
3. Observe the scan tool of the appropriate module Battery Positive parameter. The reading should be between 12.6-15.0 V.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connectors at the appropriate module/sensor.
2. Test for less than 3 Ohms between the ground circuit terminals listed below and ground:
* Terminal H, K83 Parking brake control module
* Terminal 16, K17 Electronic brake control module
* Terminal 1, K19 Suspension control module
* Terminal L X1, K47 Rear differential clutch control module
* Terminal 6, B99 Steering wheel angle sensor
* Terminal 6, B119 Multi-axis acceleration sensor
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify a test lamp illuminates between the B+/ignition circuits listed below and ground:
* Terminal A, K83 Parking brake control module
* Terminal 1, K17 Electronic brake control module
* Terminal 32, K17 Electronic brake control module
* Terminal 32, K19 Suspension control module
* Terminal M X1, K47 Rear differential clutch control module
* Terminal 5, B99 Steering wheel angle sensor
* Terminal 5, B119 Multi-axis acceleration sensor
瀚慖f the test lamp does not illuminate, test the circuit for an open/high resistance.
4. If all circuits test normal, replace the appropriate module/sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Steering Angle Sensor Replacement (See: Sensors and Switches/Sensors and Switches - Steering and Suspension/Sensors and Switches -
Steering/Steering Angle Sensor/Service and Repair/Removal and Replacement)
* Vehicle Yaw Sensor with Vehicle Lateral and Longitudinal 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 electronic brake control module replacement,
setup, and programming
C0870
DTC C0870
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.
