For 1990-2009 cars

# MIL Service Engine Soon Telltale Lamp on, ABS Telltale Lamp May Cone On Intermittently and/or Stay On with DTCs U1000, U1040 and C0550 Present

Subject: | (MIL) SERVICE ENGINE SOON Telltale Lamp ON, ABS Telltale Lamp may Come ON Intermittently and/or Stay ON with DTCs U1000, U1040 and C0550 present and/or Stored in History There May Also be Loss of Communication with the EBTCM (Repair Loose Grounds as Necessary)

Models: | 2000 - 2002 Saturn S-Series vehicles equipped with antilock braking system

### Condition

Some customers may comment the (MIL) SERVICE ENGINE SOON, Brake and ABS telltale lamps may come ON intermittently and/or stay ON.

### Cause

This condition may be caused by loose or poor grounds at one of the following locations:

• | ABS Control Assembly (EBTCM)

• | Chassis

• | Powertrain Control Module (PCM)

• | Chassis ground stud located near the Underhood Junction Block (UHJB)

• | Left front strut tower

### Correction

Refer to Service Procedure in this bulletin and repair as necessary.

### Service Procedure

1. Disconnect negative battery cable.
2. Remove battery hold down bracket.
3. Remove wire terminals from EBTCM/Chassis ground stud (1).
4. Install old fastener to EBTCM/Chassis ground stud (1) and run the fastener down stud to space frame and back several times to chase the threads and loosen undercoating.
5. Remove and discard fastener.
6. Clean all remaining debris from threads of ground stud using a small wire brush.
7. Install wire terminals to EBTCM/Chassis ground stud (1).
8. Install new fastener P/N 11516192 to EBTCM/Chassis ground stud.

Tighten
Tighten to EBTCM/chassis ground stud fastener 25 N·m (18 lb ft).

9. Install battery hold down bracket.

Tighten
Tighten to battery case bracket stud and nut to 9 N·m (80 lb in).

10. Remove fastener from PCM/Chassis ground stud (2) located on left front strut tower and repeat steps 3-7.
11. Install new fastener P/N 21006316 to PCM/Chassis ground stud.

Tighten
Tighten to PCM/Chassis ground stud fastener to 12 N·m (9 lb ft).

12. Connect negative battery cable.

Tighten
Tighten the battery terminal bolt to 17 N·m (13 lb ft).

13. Using the TECH II, clear all DTC information stored in history.
14. Verify repair.
15. If condition is still present, refer to diagnostics in the applicable S-Series Service Manual for the specific diagnostic information.

### Parts Requirements

Part Number | Description | Quantity Required per Vehicle
--- | --- | ---
11516192 | Nut, PCM/Chassis Braided Ground Strap | 1
21006316 | Nut, ABS Ground | 1

### Claim Information

To receive credit for this repair during the warranty coverage period, submit a claim through the Saturn Dealer System for N8500 (Connector, Wiring - Clean).