MIL IS ON AND/OR VEH. HARD TO START HES., ROUGH OR IDLE. Saturn Saturn 1992

For 1990-2009 cars

# MIL IS ON AND/OR VEH. HARD TO START HES., ROUGH OR IDLE

#### SUBJECT: Malfunction Indicator Lamp (SERVICE ENGINE SOON Telltale Lamp) is On and/or Vehicle Hard to Start, No Start, Hesitation, or Rough or Surging Idle (Repair and Route Wires)

#### MODELS AFFECTED: 1991-1992 Saturns and 1993 Saturns built before and including VIN PZ144581 equipped with DOHC (LLO) engines.

CONDITION: Some owners may experience the malfunction indicator lamp (SERVICE ENGINE SOON telltale lamp) is On, or the vehicle is hard to start, no start, hesitates, has a rough idle or surges during idle. Also, when performing PCM diagnostics, the following PCM diagnostic trouble codes or PCM information flags may be present:

o PCM diagnostic trouble codes 35, 22 or 49

o PCM information flags 52, 54, 67 or 76

CAUSE: There are two potential areas that could cause these conditions:

o The number 4 injector wire may be rubbing through at the throttle bracket and shorting to ground, or

o Idle air control (IAC) or throttle position (TP) sensor wires are rubbing through at brass coolant fitting on intake manifold.

CORRECTIVE ACTION: Inspect wires at both locations. (Refer to Figures on the following page for locations to inspect.) If any of the wires are damaged, repair according to procedure given in this bulletin on page 3.

If wires are not damaged and PCM diagnostic trouble codes or information flags are present, refer to PCM diagnostic trouble code and/or information flag charts in the "Electronic Engine Controls Service Manual." If no diagnostic trouble codes or information flags are present, refer to complaint/cause charts in the "Electronic Engine Controls Service Manual."

#### PROCEDURE:

--------- If individual wire strands are broken, replace the damaged portion of the wire and re-route the harness to prevent damage. (Refer to "Wire Repair" in the "Electrical Trouble Shooting" section of the "Electrical Service Manual" for procedures on repairing broken wires.)

If just the insulation is worn away, and no damage has been done to the individual wire strands, tape the damaged area and re-route the wiring harness to prevent damage.

Clear diagnostic trouble codes and verify that condition is repaired.

CLAIM INFORMATION: To receive credit for this repair, submit a claim through the Saturn Dealer System as follows:

Labor Case Operation Type Description Code Time

VW Inspect, Tape and Re - Route T9651 0.3 hrs Wires (All)

VW Inspect, Repair, Tape and T9652 0.2 hrs Re - Route Wires as necessary

#### Add:

A. To repair number 4 injector wire, if necessary 0.2 hrs

B. To repair IAC wire(s), if necessary 0.3 hrs

C. To repair TP sensor wire(s), if necessary 0.3 hrs

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those 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 a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.