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Diagnostic System Check

  1. Install scan tool. If scan tool powers up, go to next step. If scan tool does not power up, see SCAN TOOL DOES NOT POWER UP in appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
  2. Turn ignition on, engine off. Try to establish scan tool communication with Electronic Brake/Traction Control Module (EBTCM). If communication with EBTCM is established, go to next step. If communication with EBTCM is not established, see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE in appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
  3. Using scan tool, run AUTOMATED TEST in ABS/TCS/ACTIVE HANDLING. Select display DTC function for EBTCM. Record all displayed DTCs and status of displayed DTCs. If DTCs are displayed, go to next step. If no DTCs are displayed, see SYMPTOM DIAGNOSIS  .
  4. Retrieve codes and perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  table.
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Description
B2597  Traction Control System Switch Circuit
C1214  Solenoid Valve Relay Contact Or Coil Circuit Open
C1217  BPMV Pump Motor Relay Contact Circuit Open
C1221  LF Wheel Speed Sensor Input Signal Is Zero
C1222  RF Wheel Speed Sensor Input Signal Is Zero
C1223  LR Wheel Speed Sensor Input Signal Is Zero
C1224  RR Wheel Speed Sensor Input Signal Is Zero
C1225  LF Wheel Excessive Speed Variation
C1226  RF Wheel Excessive Speed Variation
C1227  LR Wheel Excessive Speed Variation
C1228  RR Wheel Excessive Speed Variation
C1232  LF Wheel Speed Sensor Circuit Open Or Shorted
C1233  RF Wheel Speed Sensor Circuit Open Or Shorted
C1234  LR Wheel Speed Sensor Circuit Open Or Shorted
C1235  RR Wheel Speed Sensor Circuit Open Or Shorted
C1236  Low System Supply Voltage
C1237  High System Supply Voltage
C1241  Magnasteer Malfunction
C1242  BPMV Pump Motor Ground Circuit Open
C1243  BPMV Pump Motor Stalled
C1245  Brake Sensor Pressure Always High
C1247  Brake Pressure Differential Switch Activated
C1255  EBTCM Internal Malfunction (ABS/TCS Disabled)
C1256  EBTCM Internal Malfunction
C1261  LF Inlet Solenoid Valve Malfunction
C1262  LF Outlet Solenoid Valve Malfunction
C1263  RF Inlet Solenoid Valve Malfunction
C1264  RF Outlet Solenoid Valve Malfunction
C1265  LR Inlet Solenoid Valve Malfunction
C1266  LR Outlet Solenoid Valve Malfunction
C1267  RR Inlet Solenoid Valve Malfunction
C1268  RR Outlet Solenoid Valve Malfunction
C1271  LF TCS Master Cylinder Isolation Valve Malfunction
C1272  LF TCS Prime Valve Malfunction
C1273  RF TCS Master Cylinder Isolation Valve Malfunction
C1274  RF TCS Prime Valve Malfunction
C1276  Delivered Torque Signal Circuit Malfunction
C1277  Requested Torque Signal Circuit Malfunction
C1278  TCS Temporarily Inhibited By PCM
C1281  Steering Sensor Uncorrelated Malfunction Without AH
C1281  Steering Sensor Uncorrelated Malfunction With AH
C1282  Yaw Rate Sensor Bias Circuit Malfunction
C1283  Excessive Time to Center Steering
C1284  Lateral Accelerometer Sensor Self Test Malfunction
C1285  Lateral Accelerometer Sensor Circuit Malfunction
C1286  Steering Sensor Bias Malfunction Without AH
C1286  Steering/Lateral Accelerometer Sensor Bias Malfunction With AH
C1287  Steering Sensor Rate Malfunction
C1288  Steering Sensor Circuit Malfunction
C1291  Open Brakelight Switch Contacts During Deceleration
C1293  DTC C1291 Set In Previous Ignition Cycle
C1294  Brakelight Switch Circuit Always Active
C1295  Brakelight Switch Circuit Open
C1296  Brake Pressure Sensor Circuit Open/Shorted
UXXXX (1)
(1) For any DTC beginning with the letter "U", see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE in appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
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