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1. With the scan tool perform the Steering Angle Sensor Calibration. 2. Operate the vehicle within the conditions for setting the DTC. Verify DTC C0186, C0196, C0253, or C0710 are not set. If DTC C0186, C0196, or C0710 are set, refer to Diagnostic Trouble Code (DTC) If only DTC C0253 set, replace the yaw and lateral acceleration sensor. If DTC C0253 sets Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement Control Module References for EBCM replacement, setup, and programming DTC C0299 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptor DTC C0299 00 Brake Booster Sensor Performance DTC C0299 5A Brake Booster Sensor Plausibility Failure DTC C0299 31 Brake Booster General Checksum Failure Diagnostic Fault Information Short to Open/High Short to Signal
2008 Chevrolet Silverado 1500 2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Circuit/System Description The electronic brake control module (EBCM) provides a bi-directional power, and ground Conditions for Running the DTC The ignition is ON. Ignition voltage is greater than 9 volts. The engine is running for the vacuum related fault to set. Conditions for Setting the DTC A condition in which no vacuum is detected in the power brake booster for approximately A condition in which low vacuum is detected in the power brake booster for approximately Conditions for Clearing the DTC The condition for the DTC is no longer present. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 Reference Information Schematic Reference Antilock Brake System Schematics Connector End View Reference Circuit Ground Resistance Voltage Performance Power Brake Booster High C0299 00 C0299 00 C0299 00 C0299 5A, 31 Power Brake Booster Low - C0299 00 C0299 00 C0299 5A, 31
2008 Chevrolet Silverado 1500 2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Component Connector End Views Description and Operation ABS Description and Operation (With JL4) or ABS Description and Operation (Without Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for Scan Tool Information Circuit/System Verification 1. DTC C0299 will set as result of power brake booster actuator or circuit failure, test for power, and ground circuits to the EBCM. These electrical failures will typically be set Test and repair the EBCM power or ground circuits if necessary. 2. DTC C0299 will set as result of the power brake booster vacuum is too low. These will be set approximately 10 seconds or more after start-up, and may be intermittent. Locate and repair the source of the vacuum leak. Refer to Brake System Vacuum Circuit/System Testing 1. Ignition OFF, disconnect the harness connector from the power brake booster actuator. 2. Test for less than 25.0 ohm of resistance between the harness connector terminal 5 and ground. If greater than 25.0 ohm, test the ground circuit for an open/high resistance. IMPORTANT: It is recommend that Component Testing is performed before Circuit Testing when diagnosing the power brake booster
2008 Chevrolet Silverado 1500 2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
3. Connect a test lamp between the actuator harness connector terminal 1 and terminal 5. 4. Ignition ON, command the Active Brake Booster to ON and OFF with a scan tool. If the test lamp remains OFF during the commands, test for a short to ground or an If the test lamp is always ON, test the control circuits for a short to battery positive. If 5. If all circuits test normal, test or replace the vacuum brake booster assembly. 6. If all circuits test normal, and no vacuum leaks were found, replace the electronic brake control module (EBCM). Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Control Module References for EBCM replacement, setup, and programming DTC C0455 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptor DTC C0455 00 Front Steering Position Sensor Circuit Diagnostic Fault Information Circuit Short to Ground Open/High Resistance Short to Signal Performance Steering Angle Sensor 5-Volt C0455 C0455 C0455 - Steering Angle Sensor Signal C0455 C0455 C0455 - Low Reference Circuit - C0455 - -
2008 Chevrolet Silverado 1500 2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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