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Home >> Chevrolet >> 1997 >> Corvette Automatic >> Repair and Diagnosis >> Suspension >> Electronic Suspension >> Suspension - Electronic Real Time Damping >> Testing & Diagnosis >> DTC C1768: Position Sensor Supply Malfunction (OVERCURRENT)

DTC C1768: Position Sensor Supply Malfunction (OVERCURRENT)

  1. Perform RTD diagnostic system check. See RTD DIAGNOSTIC SYSTEM CHECK . After performing RTD diagnostic system check, go to next step.
  2. Disconnect all 4 position sensor connectors. Using scan tool, clear all DTCs. If DTC C1768 is set as current, go to next step. If DTC C1768 is not set as current, go to step 6).
  3. Reconnect all 4 position sensor connectors. Using scan tool, monitor each position sensor voltage. If any position sensor voltage is less than one volt, go to next step. If all position sensor voltages are more than one volt, go to step 5).
  4. Check circuits No. 1208 (Red/Black wire), No. 1205 (Purple/White wire), No. 1211 (Purple/White wire) and No. 1214 (Purple/White wire) for short to ground and repair as necessary. See WIRING DIAGRAM . When repairs are complete, go to step 10). If circuits (wires) are okay, go to step 9).
  5. Check circuits No. 1208 (Red/Black wire), No. 1205 (Purple/White wire), No. 1211 (Purple/White wire) and No. 1214 (Purple/White wire) for short to voltage and repair as necessary. See WIRING DIAGRAM . When repairs are complete, go to step 10). If circuits (wires) are okay, go to step 9).
  6. Using scan tool, clear all DTCs. Reconnect all 4 position sensors one at a time checking for DTC after each connector is reconnected. If DTC C1768 sets after reconnecting any position sensor, go to step 8). If DTC C1768 does not set, go to next step.
  7. Check circuits No. 1208, No. 1214 (both Red/Black wires), and No. 1205 and No. 1211 (both Purple/White wires) for intermittent operation. See WIRING DIAGRAM . See NOTES ON INTERMITTENTS under SELF-DIAGNOSTICS. After repairs, go to step 10). If no problem was found, system is functioning properly.
  8. Replace position sensor that caused DTC to set when reconnected. See RTD POSITION SENSOR  under REMOVAL & INSTALLATION. After repairs, go to step 10).
  9. Replace RTD control module. See RTD CONTROL MODULE  under REMOVAL & INSTALLATION. After repairs, go to next step.
  10. Turn ignition off. Reinstall/reconnect all components/connectors. Using scan tool, clear all DTCs and perform RTD DIAGNOSTIC SYSTEM CHECK .
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