Brakes

All Component Locator

• ABS Components
• Antilock Brake System Component Views

All Description and Operation

• Abbreviations and Definitions
• ABS Description
• ABS Operation
• Basic Knowledge Required
• General System Description
• Service Precautions

All Special Tools and Equipment

• Special Tools

All Visual Identification

• Antilock Brake System Connector End Views

Cleaning, Inspection, and Adjustment

• Antilock Brake System Automated Bleed Procedure

Diagnostic Procedures

• ABS Indicator Always On
• ABS Indicator Inoperative
• Diagnostic Starting Point
• No Communication with Electronic Brake Control Module
• Scan Tool Displays Undefined DTC
• Symptoms
• Traction Off Indicator Always On
• Traction Off Indicator Inoperative

Diagnostic Trouble Codes

• DTC C1214 System Relay Contact or Coil Circuit Open
• DTC C1217 Pump Motor Shorted to Ground
• DTC C1218 Pump Motor Circuit Shorted to Voltage or Motor Ground Open
• DTC C1221 LF Wheel Speed Sensor Input Signal is 0
• DTC C1222 RF Wheel Speed Sensor Input Signal is 0
• DTC C1223 LR Wheel Speed Sensor Input Signal is 0
• DTC C1224 RR Wheel Speed Sensor Input Signal is 0
• DTC C1225 LF Excessive Wheel Speed Variation
• DTC C1226 RF Excessive Wheel Speed Variation
• DTC C1227 LR Excessive Wheel Speed Variation
• DTC C1228 RR Excessive Wheel Speed Variation
• DTC C1232 LF Wheel Speed Circuit Open or Shorted
• DTC C1233 RF Wheel Speed Circuit Open or Shorted
• DTC C1234 LR Wheel Speed Circuit Open or Shorted
• DTC C1235 RR Wheel Speed Circuit Open or Shorted
• DTC C1236 Low System Supply Voltage
• DTC C1237 High System Supply Voltage
• DTC C1242 Pump Motor Circuit Open
• DTC C1243 BPMV Pump Motor Stalled
• DTC C1254 Abnormal Shutdown Detected
• DTC C1255 EBCM Internal Malfunction
• DTC C1256 EBCM Internal Malfunction
• DTC C1261 LF Inlet Valve Solenoid Malfunction
• DTC C1262 LF Outlet Valve Solenoid Malfunction
• DTC C1263 RF Inlet Valve Solenoid Malfunction
• DTC C1264 RF Outlet Valve Solenoid Malfunction
• DTC C1265 LR Inlet Valve Solenoid Malfunction
• DTC C1266 LR Outlet Valve Solenoid Malfunction
• DTC C1267 RR Inlet Valve Solenoid Malfunction
• DTC C1268 RR Outlet Valve Solenoid Malfunction
• DTC C1275 PCM Requested ETS to Be Disabled
• DTC C1278 ETS Temporarily Inhibited By PCM
• DTC C1295 Brake Lamp Switch Circuit Open
• DTC C1298 PCM Class 2 Serial Data Link Malfunction

Electrical/Electronic Schematic Diagrams

• Antilock Brake System Schematic Icons
• Antilock Brake System Schematics

General Diagnostic Information

• Diagnostic System Check - ABS
• Diagnostic Trouble Code (DTC) List
• Electromagnetic Interference
• Enhanced Diagnostics
• Scan Tool Data Definitions
• Scan Tool Data List
• Scan Tool Diagnostics
• Self-Diagnostics

Mechanical Specifications

• Fastener Tightening Specifications

Other Specifications

• GM SPO Group Numbers

Removal, Installation, and Replacement

• Brake Pressure Modulator Valve Bracket Replacement
• Brake Pressure Modulator Valve Replacement
• Electronic Brake Control Module Replacement
• Front Wheel Speed Sensor Replacement
• Front Wheel Speed Sensor Wiring Harness Replacement
• Rear Wheel Speed Sensor Replacement
• Rear Wheel Speed Sensor Wiring Harness Replacement