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For 1990-2009 cars only
Makes 🢒 Buick 🢒 2004 🢒 Century 🢒 Bulletins 🢒 Intermittent SES, ABS or TCS Lamp Illuminated, Engine No Crank/No Start, Varous I/P Cluster Intermittents, DTCs U1000, U1016, B1422, B2957, B2958 Set, Shifter Locked In Park (BTSI Solenoid Inoperative

Intermittent SES, ABS or TCS Lamp Illuminated, Engine No Crank/No Start, Varous I/P Cluster Intermittents, DTCs U1000, U1016, B1422, B2957, B2958 Set, Shifter Locked In Park (BTSI Solenoid Inoperative

Subject:Intermittent SES, ABS or TCS Lamp Illuminated, Engine No Crank/No Start, Various I/P Cluster Intermittents, Diagnostic Trouble Codes (DTCs) U1000, U1016, B1422, B2957, B2958 Set, Shifter Locked In Park (BTSI Solenoid Inoperative) (Replace Engine Wiring Junction Block (Underhood Bussed Electrical Center (UBEC)) Connector Terminals)

Models:2001-2004 Buick Century
2001-2004 Buick Regal


Condition

Some customers may comment on one or more of the following conditions:

    • Service Engine Soon (SES), Anti-Lock Brake (ABS), or Traction Control System (TCS) lamp may be illuminated.
    • A No Crank/No Start condition.
    • Various intermittent I/P concerns.
    • Shifter will not move out of Park (Brake/Transmission Interlock Solenoid Inoperative)
    • Diagnostic Trouble Codes (DTCs) U1000, U1016, B1422, B2957, or B2958 may be set. Additional codes may be found due to this concern.

Cause

These conditions may be due to deformed or collapsed terminals in the Engine Wiring Junction Block (Underhood Bussed Electrical Center (UBEC)) connectors causing a poor connection.

Correction
  1. Remove the Underhood Electrical Center/Engine Wiring Junction Block base assembly. Refer to the Underhood Electrical Center or Junction Block Replacement procedure in the Wiring Systems sub-section of the Service Manual.

    2. Object Number: 1383152 Size: MF
  2. Inspect ALL of the terminals in UBEC connectors C1, C2 and C3. Use Terminal Test Kit, J 35616A, in order to determine proper terminal tension.
    3. • If any of the terminals are visibly damaged/deformed/collapsed (1), go to the repair procedure in this bulletin.
    • If ALL of the terminals are NOT damaged and proper connections can be made, perform the standard diagnostic procedures in the appropriate Service Manual.

Repair Procedure

Tools Required
J 38125-C Terminal Repair Kit

Important: Refer to the Reference Guide in the Terminal Repair Kit for the proper removal and crimping tool and part replacement information for the 68-way (female) Metri-Pack 280 Series connector.

  1. Remove the Terminal Position Assurance (TPA) device from the connector.
  2. Insert the proper removal tool into the front of the connector body in order to disengage the flexible lock under the damaged terminal(s).

    3. Object Number: 1383153 Size: SH
  3. Gently pull on the wire to remove the terminal through the back of the connector.
  4. Cut the wire as close to the old terminal as possible.
  5. Strip 5 mm (3/16 in) of insulation from the wire.
  6. Use the proper crimping tool and crimp a new terminal to the wire.
  7. Solder the crimp with rosin core solder.
  8. Insert the new terminal and wire into the back of the connector. Ensure the terminal is seated and the flexible lock is engaged.
  9. Install the Terminal Position Assurance (TPA) device into the connector.
  10. Install the Underhood Electrical Center/Engine Wiring Junction Block base assembly. Refer to the Underhood Electrical Center or Junction Block Replacement procedure in the Wiring Systems sub-section of the Service Manual
  11. Verify that the condition(s) has been corrected and DTCs are cleared.

Warranty Information

For vehicle repaired under warranty, use:

Labor Operation

Description

Labor Time

N1730

Engine Wiring Junction Block (Underhood Bussed Electrical Center (UBEC)) -- Remove & Reinstall

0.5 hr

Add:

To Replace Terminal(s)

0.1 - 0.3 hr