LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Oldsmobile >> 1998 >> Regency >> Repair and Diagnosis >> Brakes >> Anti-Lock Brake System With Traction Control System >> Diagnosis & Testing >> Using Tech 2 Scan Tool
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Using Tech 2 Scan Tool

NOTE: When using Tech 2 scan tool for diagnostics, ABS/TCS system is disabled by EBCM/EBTCM. ANTI-LOCK indicator will illuminate indicating only normal power assist braking is available. After diagnostics have been completed using Tech 2 scan tool, disconnect scan tool from Data Link Connector (DLC) and turn ignition off for a least 10 seconds before road testing. This procedure is done to reset EBCM/EBTCM.

Connect Tech 2 scan tool to Data Link Connector (DLC) located under left side of instrument panel. Follow scan tool manufacturer's instructions to retrieve stored fault codes.

If multiple codes are displayed, begin diagnosis with code that is displayed first. See DIAGNOSTIC TROUBLE CODE  table. Diagnose all codes in the order displayed by Tech 2 scan tool.

DIAGNOSTIC TROUBLE CODES

DTC (1)Definition
C1211  ABS Indicator Light Circuit Malfunction ("C" Body)
C1211  ABS Indicator Light Circuit Malfunction ("E" & "K" Bodies)
C1211  ABS Indicator Light Circuit Malfunction ("H" Body)
C1214  Solenoid Valve Relay Contact Or Coil Circuit Open
C1216  Solenoid Valve Relay Coil Circuit Open ("H" Body)
C1217  BPMV Pump Motor Relay Contact Circuit Open
C1221  Left Front Wheel Speed Sensor Input Signal Equals Zero
C1222  Right Front Wheel Speed Sensor Input Signal Equals Zero
C1223  Left Rear Wheel Speed Sensor Input Signal Equals Zero
C1224  Right Rear Wheel Speed Sensor Input Signal Equals Zero
C1225  Left Front Excessive Wheel Speed Variation
C1226  Right Front Excessive Wheel Speed Variation
C1227  Left Rear Excessive Wheel Speed Variation
C1228  Right Rear Excessive Wheel Speed Variation
C1232  Left Front Wheel Speed Sensor Circuit Open Or Shorted
C1233  Right Front Wheel Speed Sensor Circuit Open Or Shorted
C1234  Left Rear Wheel Speed Sensor Circuit Open Or Shorted
C1235  Right Rear Wheel Speed Sensor Circuit Open Or Shorted
C1236  Low System Voltage
C1237  High System Voltage
C1238  Brake Thermal Model Limit Exceeded
C1241  Magnasteer Circuit Malfunction
C1242  BPMV Pump Motor Ground Circuit Open
C1243  BPMV Pump Motor Stalled
C1252  ICCS2 Data Link Left Malfunction ("E" & "K" Bodies)
C1253  ICCS2 Data Link Right Malfunction ("E" & "K" Bodies)
C1255  EBCM/EBTCM Internal Malfunction
C1256  EBCM/EBTCM Internal Malfunction
C1261  Left Front Hold Valve Solenoid Malfunction
C1262  Left Front Release Valve Solenoid Malfunction
C1263  Right Front Hold Valve Solenoid Malfunction
C1264  Right Front Release Valve Solenoid Malfunction
C1265  Left Rear Hold Valve Solenoid Malfunction
C1266  Left Rear Release Valve Solenoid Malfunction
C1267  Right Rear Hold Valve Solenoid Malfunction
C1268  Right Rear Release Valve Solenoid Malfunction
C1271  Left Front TCS Master Cylinder Isolation Valve Malfunction
C1272  Left Front TCS Prime Valve Malfunction
C1273  Right Front TCS Master Cylinder Isolation Valve Malfunction
C1274  Right Front TCS Prime Valve Malfunction
C1275  PCM Serial Data Malfunction ("H" Body)
C1276  Delivered Torque Signal Circuit Malfunction
C1277  Requested Torque Signal Circuit Malfunction
C1278  TCS Temporarily Inhibited By PCM
C1281  ABS Sensors Uncorrelated ("E" & "K" Bodies)
C1282  Yaw Rate Sensor Bias Circuit Malfunction ("E" & "K" Bodies)
C1283  Excessive Time To Center Steering ("E" & "K" Bodies)
C1284  Lateral Accelerometer Sensor Self Test Malfunction ("E" & "K" Bodies)
C1285  Lateral Accelerometer Sensor Circuit Malfunction ("E" & "K" Bodies)
C1286  Steering/Lateral Accelerometer Sensor Bias Malfunction ("E" & "K" Bodies)
C1287  Steering Sensor Rate Malfunction ("E" & "K" Bodies)
C1288  Steering Sensor Circuit Malfunction ("E" & "K" Bodies)
C1291  Open Brakelight Switch During Deceleration
C1293  DTC C1291 Set In Current Or Previous Ignition Cycle
C1294  Brakelight Switch Circuit Always Active
C1295  Brakelight Switch Circuit Open
C1297  PCM Indicated Extended Travel Brake Switch Failure ("E" & "K" Bodies)
C1298  PCM Indicated Class 2 Serial Data Link Malfunction ("C", "E" & "K" Bodies)
U1016  Loss Of PCM Communications ("C", "E" & "K" Bodies)
U1056  Loss Of CVRSS Communications ("E" & "K" Bodies)
U1255  Generic Loss Of Communications ("C", "E" & "K" Bodies)
U1300  Class 2 Circuit Shorted To Ground ("C", "E" & "K" Bodies)
U1301  Class 2 Circuit Shorted To Voltage ("C", "E" & "K" Bodies)
(1) Always perform diagnostic system check before diagnosing DTCs. See DIAGNOSTIC SYSTEM CHECK.