Ignition Coil Available as a Service Part (P/N16167763, Ignition Coil) #99-T-14 - (Nov 25, 2003)

1991-1999 Saturn vehicles

Purpose

The purpose of this bulletin is to notify retailers that the ignition coil is now available as a separate service part. Previously, the ignition coil was only available as part of the electronic ignition (EI) module assembly.

This bulletin provides ignition coil replacement guidelines and ignition coil installation and removal procedures.

Ignition Coil Diagnosis

Do not replace the ignition coil unless it can be verified that it is only cause for the condition and/or a related diagnostic trouble code (DTC).

If diagnosis leads to the ignition module assembly, and it can not be verified that the ignition coil is faulty, the entire ignition module assembly must be replaced. Refer to "Ignition Coil Inspection" to inspect the ignition coil.

Ignition Coil Inspection

The ignition coil can be checked using the following procedure.

1. Inspect ignition coil for corrosion.
• If excessive corrosion is present on the ignition coil terminals, replace the ignition coil only, and verify that the vehicle conditions and/or DTCs are no longer present.
• If corrosion is not present on the ignition coil terminals, refer to step 2.
2. Check resistance between ignition coil towers.
If resistance between the ignition coil towers is not within the specified range of 8--15 K ohms, replace the ignition coil.

Refer to "Procedure" in this bulletin to replace the ignition coil.

Procedure

1. Turn ignition Off.
2. Disconnect ignition module harness connector.
3. Remove upper and lower ignition coil bolts.





Important

For spark plug wires with a connector position assurance (CPA) installed (1999 model year or later), use a small, flat-bladed screwdriver to remove spark plug wires from the coil tower by gently prying between the ignition module and black CPA housing.

Important

Note which spark plug wire is removed from which ignition coil tower. The spark plug wires must be connected to the correct ignition coil towers.

4. Disconnect spark plug wires from ignition coil tower.
5. Remove ignition coil from ignition module by rotating the coil in an upward direction.

Important

Step 6 is required for 1991-1995 model year vehicles only.





6. Remove white alignment pins from the ignition module using pliers.




7. Install new ignition coil.
1. Place ignition coil tab into ignition module slot.

Notice

Make certain electrical connectors are lined up before seating to avoid damage to electrical connectors.

2. Rotate ignition coil until lower portion of ignition coil is seated on make electrical connectors.

Important

Perform step 8 if ignition module uses a CPA to retain spark plug wires. Refer to step 9 if ignition module does not use a CPA to retain spark plug wires.

8. Install spark plug wires housed with CPA.

Important

Ensure threads of bolts and threaded holes are clean and free of any residue.

9. Install upper and lower ignition module bolts.
Tighten

8 N·m (71 in - lb)

Parts Requirements

16167763 - Ignition Coil

Claim Information

To receive credit for this repair during the warranty coverage period, submit a claim through the Saturn Dealer System as follows:

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer".  They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle.  Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely.  If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition.  See your GM dealer for information on whether your vehicle may benefit from the information.

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