2010 Cadillac CTS Sedan AWD V6-3.6L Page 766

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 766



1. Engine running, measure and record the voltage at the battery terminals.



2. Verify that the battery voltage is 12.6-15.5 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)



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the electronic park brake module(EPB).



2. Ignition OFF, test for less than 3 Ohms between the ground circuit terminal H and ground.



瀚慖f greater than the specified value, test the ground circuit for an open/high resistance.



3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A and ground.



瀚慖f the test lamp does not illuminate , test the circuit for an open/high resistance.



4. If all circuits test normal, test or replace the EPB.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



Control Module References (See: Testing and Inspection/Programming and Relearning) for EPB replacement, setup, and programming



C0890



DTC C0277 or C0890



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 Descriptors



DTC C0277 06



- Brake Pedal Position Sensor Circuit Short to Ground or Open



DTC C0277 07



- Brake Pedal Position Sensor Circuit Voltage Above Threshold



DTC C0277 09



- Brake Pedal Position Sensor Circuit Rate of Change Above Threshold



DTC C0277 4B



- Brake Pedal Position Sensor Calibration Not Learned



DTC C0890 03



- Device Voltage Reference Output 3 Circuit Voltage Below Threshold



DTC C0890 07



- Device Voltage Reference Output 3 Circuit Voltage Above Threshold



Diagnostic Fault Information

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