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Home >> Oldsmobile >> 1999 >> Intrigue GL, 3.5 H >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Anti-Lock Brake System With Traction Control System - Abs-VI) >> Diagnostic Tests >> DTC C1356: Left TCS Motor Circuit Open (Century & Regal)

DTC C1356: Left TCS Motor Circuit Open (Century & Regal)

WARNING: This page is about a different variant/trim than selected.
  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK. After performing diagnostic system check, go to next step.
  2. If DTC C1356 occurs intermittently, go to step 13)  . If DTC C1356 does not occur intermittently, go to next step.
  3. Turn ignition off. Disconnect 4-pin TCS motor pack connector. Using DVOM, measure resistance between terminals "A" (Light Blue wire) and "B" (Dark Blue wire) of motor pack connector (component side). If resistance is 0.2-1.5 ohms, go to next step. If resistance is not 0.2-1.5 ohms, go to step 8)  .
  4. Disconnect 8-pin EBTCM connector C3. Using DVOM, measure resistance between terminal "A" (Light Blue wire) of motor pack connector (harness side) and terminal "H" (Light Blue wire) of EBTCM connector C3. If resistance is 0-1.5 ohms, go to next step. If resistance is not 0-1.5 ohms, go to step 9)  .
  5. Using DVOM, measure resistance between terminal "B" (Dark Blue wire) of motor pack connector (harness side) and terminal "G" (Dark Blue wire) of EBTCM connector C3. If resistance is 0-1.5 ohms, go to next step. If resistance is not 0-1.5 ohms, go to step 10)  .
  6. Check 4-pin TCS motor pack connector and 8-pin EBTCM connector C3 for poor terminal contact, corrosion or damage. If connectors are faulty, go to step 11)  . If connectors are okay, go to next step.
  7. Reconnect 4-pin TCS motor pack connector. Reconnect EBTCM connector C3. Test drive vehicle obtaining speed of at least 10 MPH. Stop vehicle and turn ignition off. Repeat drive sequence 2 more times. Using scan tool, display DTCs. If DTC C1356 sets in last 3 drive cycles, go to step 12)  . If DTC C1356 does not set in last 3 drive cycles, go to step 13)  .
  8. Replace motor pack.
  9. Repair open or high resistance in Light Blue wire between motor pack and EBTCM.
  10. Repair open or high resistance in Dark Blue wire between motor pack and EBTCM.
  11. Replace all faulty terminals or connectors.
  12. Replace EBTCM.
  13. Malfunction is not currently present. An intermittent may be caused by a poor connection, rubbed through wire insulation, or a broken wire inside insulation. If malfunction is not current, wiggle wires of affected channel and check if DTC resets. This will assist in locating an intermittent in motor circuitry or connections.

Frequency of malfunction can be determined by using enhanced diagnostic function of scan tool. Check for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wiring connections, or damaged wiring harness.

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