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Circuit/System Verification 1. Ignition ON, observe the scan tool Lateral Accelerometer Signal parameter. The reading should be 2.3-2.7 volts. 2. Ignition ON, observe the scan tool Yaw Rate Sensor parameter. The reading should be 2.3- 2.7 volts. Circuit/System Testing 1. Ignition OFF, disconnect the harness connector at the yaw rate/lateral accelerometer. 2. Test for less than 2 ohms of resistance between the ground circuit terminal 1 and ground. If greater than the specified range, test the ground circuit for an open/high resistance. 3. Ignition ON, test for 11.8 - 12.2 volts between the 12-volt reference circuit terminal 4 and ground. If less than the specified range, test the 12-volt reference circuit for a short to ground 4. Test for 5.5-7.0 volts between the CAN circuit terminal 3 and ground. If greater than the specified range, test the CAN circuit for a short to voltage. If the If less than the specified range, test the CAN circuit for a short to ground or an 5. Test for 5.5-7.0 volts between the CAN circuit terminal 2 and ground. If greater than the specified range, test the CAN circuit for a short to voltage. If the If less than the specified range, test the CAN circuit for a short to ground or an 6. Test for infinite ohm of resistance between the CAN circuit High, and Low terminals 2 and 3. If less than the specified range, test the CAN circuits for a shorted to each other. If the 7. If all circuits test normal, test or replace the yaw rate/lateral accelerometer sensor. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Control Module References for EBCM replacement, setup and programming
2008 Chevrolet Silverado 1500 2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
DTC C0201 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 C0201 00 Antilock Brake System (ABS) Enable Relay Contact Circuit DTC C0201 04 Antilock Brake System (ABS) Enable Relay Contact Circuit Open DTC C0201 0E Antilock Brake System (ABS) Enable Relay Contact Circuit Resistance Below Threshold Circuit/System Description The solenoid relay, located within the electronic brake control module (EBCM), supplies battery Conditions for Running the DTC Ignition voltage is greater than 9.5 volts. The solenoid relay is commanded ON. Conditions for Setting the DTC One or more of the following conditions exists: The EBCM detects an open in the battery positive voltage circuit to the solenoid valve The EBCM detects a stuck open solenoid valve relay or an open circuit between the Action Taken When the DTC Sets
2008 Chevrolet Silverado 1500 2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
The EBCM disables the antilock brake system (ABS)/traction control system The ABS indicator turns ON. The Traction Control indicator turns ON. The red brake warning indicator turns ON. The driver information center (DIC) displays the SERVICE BRAKE Conditions for Clearing the DTC The condition for setting 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 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
2008 Chevrolet Silverado 1500 2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Circuit/System Verification Ignition ON, observe the scan tool EBCM Battery Voltage Signal parameter. The reading should Circuit/System Testing 1. Ignition OFF, disconnect the harness connector at the EBCM. 2. Test for less than 2 ohm of resistance between the ground terminals 38 and 12 to ground. If greater than the specified range, test the ground circuits for an open/high resistance. 3. Verify that a test lamp illuminates between the B+ terminals 25 and 13 and ground. If the test lamp does not illuminate, test the B+ circuits for a short to ground or an 4. If all circuits test normal, replace the EBCM. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Control Module References for EBCM replacement, setup, and programming DTC C0242 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 C0242 00 Engine Control Module (ECM) Indicated TCS Malfunction DTC P0856 Engine Control Module (ECM) Indicated TCS Malfunction Circuit/System Description The electronic brake control module (EBCM) and the engine control module (ECM)
2008 Chevrolet Silverado 1500 2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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