Buick Skylark 1994 V6 3.1L Workshop Manual

> Powertrain Management > Fuel Delivery and Air Induction > Sensors and Switches - Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagnostic Aids > Wire Repair

Procedures > Typical Electrical Repair Procedures > Repairing Connectors > Page 5768

Throttle Position Sensor: Diagnostic AidsSplicing Copper Wire Using Splice Clips

Splice clips are included in the J 38125-A Terminal Repair Kit. The splice clip is a general purpose wire repair device. It may not be acceptable forapplications having special requirements such as moisture sealing.

Step 1: Open the Harness

If the harness is taped, remove the tape. To avoid wire insulation damage, use a sewing "seam ripper" to cut open the harness (available fromsewing supply stores). If the harness has a black plastic conduit, simply pull out the desired wire.

Step 2: Cut the Wire

40 mm (1.5 in.)

Begin by cutting as little wire off the harness as possible. You may need the extra length of the wire later if you decide to cut more wire off tochange the location of a splice. You may have to adjust splice locations to make certain that each splice is at least away from othersplices, harness branches or connectors.

Wire Size Conversion Table

Step 3: Strip the Insulation

AWG

When replacing a wire, use a wire of the same size as the original wire or larger. The schematics list wire size in metric units. The table shows thecommercial wire sizes that can be used to replace each metric wire size. Each AWG size is either equal to or larger than the equivalentmetric size.
To find the correct wire size either find the wire on the schematic page and convert the metric size to the AWG size, or use an AWG wire gage.

If you aren't sure of the wire size, start with the largest opening in the wire stripper and work down until a clean strip of the insulation is removed.Be careful to avoid nicking or cutting any of the wires.

> Powertrain Management > Fuel Delivery and Air Induction > Sensors and Switches - Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information

> Diagrams > Diagnostic Aids > Wire Repair Procedures > Typical Electrical Repair Procedures > Repairing Connectors > Page 5769

Skylark V6-191 3.1L VIN M SFI (1994)

Entering The Splice Clip

Step 4: Crimp the Wires

Select the proper clip to secure the splice. To determine the proper clip size for the wire being spliced, follow the directions included in the J38125-A Terminal Repair Kit. Select the correct anvil on the crimper. (On most crimpers your choice is limited to either a small or large anvil.)Overlap the stripped wire ends and hold them between your thumb and forefinger as shown. Then, center the splice clip under the stripped wiresand hold it in place.^

Open the crimping tool to its full width and rest one handle on a firm flat surface.

^ Center the back of the splice clip on the proper anvil and close the crimping tool to the point where the former touches the wings of the clip.

> Powertrain Management > Fuel Delivery and Air Induction > Sensors and Switches - Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information

> Diagrams > Diagnostic Aids > Wire Repair Procedures > Typical Electrical Repair Procedures > Repairing Connectors > Page 5770

Skylark V6-191 3.1L VIN M SFI (1994)

Crimping The Splice Clip

^ Make sure that the clip and wires are still in the correct position. Then, apply steady pressure until the crimping tool closes.
^

Before crimping the ends of the clip, be sure that:-

The wires extend beyond the clip in each direction.

- No strands of wire are cut loose.

- No insulation is caught under the clip.

Completing The Crimp

Crimp the splice again, once on each end. Do not let the crimping tool extend beyond the edge of the clip or you may damage or nick the wires.

Applying The Solder

Apply 60/40 rosin core solder to the opening in the back of the clip. Follow the manufacturer's instruction for the solder equipment you are using.Step 5: Solder

> Powertrain Management > Fuel Delivery and Air Induction > Sensors and Switches - Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information

> Diagrams > Diagnostic Aids > Wire Repair Procedures > Typical Electrical Repair Procedures > Repairing Connectors > Page 5771

Skylark V6-191 3.1L VIN M SFI (1994)

Proper First Taping

Proper Second Taping

If the wire does not belong in a conduit or other harness covering, tape the wire again. Use a winding motion to cover the first piece of tape.

Step 6: Tape the Splice

Center and roll the splicing tape. The tape should cover the entire splice. Roll on enough tape to duplicate the thickness of the insulation on theexisting wires. Do not flag the tape. Flagged tape may not provide enough insulation, and the flagged ends will tangle with the other wires in theharness.

> Powertrain Management > Fuel Delivery and Air Induction > Sensors and Switches - Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagnostic Aids > Wire Repair

Procedures > Typical Electrical Repair Procedures > Repairing Connectors > Page 5772

Throttle Position Sensor: Diagnostic AidsSplicing Twisted/Shielded Cable

Twisted/shielded Cable

Twisted/shielded cable is sometimes used to protect wiring from electrical noise (stray signals). For example, two-conductor cable of this construction isused between the Engine Control Module and the distributor.(ECM)

Remove the outer jacket and discard it. Be careful to avoid cutting into the drain wire or the mylar tape.Step 1: Remove Outer Jacket

Unwrap the aluminium/mylar tape, but do not remove it. The tape will be used to rewrap the twisted conductors after the splices have been made.Step 2: Unwrap the Tape

The Untwisted Conductors

Step 3: Prepare the Splice

Untwist the conductors. Then, prepare the splice by following the splicing instructions for copper wire presented earlier. Remember to staggersplices to avoid shorts.

After you have spliced and taped each wire, rewrap the conductors with the mylar tape. Be careful to avoid wrapping the drain wire in the tape.Step 4: Re-assemble the Cable

> Powertrain Management > Fuel Delivery and Air Induction > Sensors and Switches - Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information

> Diagrams > Diagnostic Aids > Wire Repair Procedures > Typical Electrical Repair Procedures > Repairing Connectors > Page 5773

Skylark V6-191 3.1L VIN M SFI (1994)

The Re-assembled Cable

Next, splice the drain wire following the splicing instructions for copper wire. Then, wrap the drain wire around the conductors and mylar tape.

Proper Taping

Tape over the entire cable using a winding motion. This tape will replace the section of the jacket you removed to make the repair.Step 5: Tape the Cable

> Powertrain Management > Fuel Delivery and Air Induction > Sensors and Switches - Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagnostic Aids > Wire Repair

Procedures > Typical Electrical Repair Procedures > Repairing Connectors > Page 5774

Throttle Position Sensor: Diagnostic AidsTerminal Repairs

Terminal Repair

The following repair procedures can be used to repair Push-to-Seat, Pull-to-Seat or Weather Pack(R) terminals. Some terminals do not require all stepsshown. Skip those that don't apply. The Terminal Repair Kit (J 38125-A) contains further information.

Cut off terminal between core and insulation crimp (minimize wire loss) and remove seal for Weather Pack(R) terminals.Step 1:

Apply correct seal per gauge size of wire and slide back along wire to enable insulation removal (Weather Pack(R) terminals only).Step 2:

Align seal with end of cable insulation (Weather Pack(R) terminals only).Step 4:

Position strip (and seal for Weather Pack(R)) in terminal.Step 5:

Hand crimp core wings.Step 6:

Hand crimp insulation wings (non-Weather Pack(R)). Hand crimp insulation wings around seal and cable (Weather Pack(R)).Step 7:

Remove insulation.Step 3:

Solder all hand crimped terminals.Step 8:

> Powertrain Management > Fuel Delivery and Air Induction > Sensors and Switches - Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagnostic Aids > Page 5775

Throttle Position Sensor Wiring Schematic

> Powertrain Management > Fuel Delivery and Air Induction > Sensors and Switches - Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Page 5776

Throttle Position Sensor: Description and Operation

Throttle Position Sensor (TPS)

Throttle Position Sensor Wiring Schematic

PURPOSE:

(TPS)

The Throttle Position Sensor is a potentiometer that senses throttle angle and sends a signal to the PCM. This input to the PCM is used tocontrol the fuel system on acceleration and deceleration.

OPERATION:

The PCM can determine fuel delivery based on throttle valve angle (driver demand). A broken or loose TP sensor can cause intermittent bursts offuel from the injector and an unstable idle because the PCM thinks the throttle is moving. A problem in any of the TP sensor circuits should seteither a DTC 21 or 22. Once a diagnostic trouble code is set, the PCM will use an artificial default value for TP sensor and some vehicleperformance will return. A high idle will result when either DTC 21 or DTC 22 is set.

The TPS has three internal circuits. One to ground, a second from the PCM as a 5.0 volt reference source and a third circuit is used by the PCM tomeasure the output voltage. As the throttle angle changes (pressing down on accelerator pedal) the TPS voltage output varies from about .5 volt atidle to about 4.9 volts at wide open throttle (WOT).

> Powertrain Management > Fuel Delivery and Air Induction > Sensors and Switches - Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Page 5777

Throttle Position Sensor: Adjustments

The throttle position sensor on this engine is not adjustable, as can be noted by the round screw holes (adjustable sensors have slotted screw holes foradjustment.)

> Powertrain Management > Fuel Delivery and Air Induction > Sensors and Switches - Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Page 5778

Throttle Position Sensor: Service and Repair

Intake Air System Components

Throttle Body, TPS, And IAC Valve Assembly

REMOVAL:

1. Remove the rear intake air duct and disconnect the TPS electrical connector.

2. Remove the TPS attaching screws.

3. Remove the TPS valve assembly.

Reverse procedure for installation.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Body > Component Information > Locations

Throttle Body Installation

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Body > Component Information > Locations > Page 5782

Throttle Body, TPS, And IAC Valve Assembly

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Body > Component Information > Locations > Page 5783

Throttle Body: Service and Repair

Intake Air System Components

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Body > Component Information > Locations > Page 5784

Skylark V6-191 3.1L VIN M SFI (1994)

Throttle Body Installation

REMOVAL

1. Remove rear intake air duct.

2. Disconnect IAC valve and TPS sensor electrical connectors.

3. Remove throttle body and gasket.

4. Remove IAC valve and TPS sensor from throttle body, if necessary.

Reverse procedure for installation.

CLEANING AND INSPECTION

1. If IAC valve is removed from throttle body, clean the IAC valve O-ring sealing surface and IAC valve pintle before re-installation.

Use a cleaning solvent and a parts cleaning brush to remove carbon deposits from throttle body and related parts. DO NOT use carburetorNOTE:

cleaner or other cleaners containing methyl ethyl ketones. These are extremely strong solvents and are not necessary for removing thiskind of deposit.

2. Inspect the IAC valve O-ring for cuts, cracks or distortion. Replace if damaged.

3.
If installing a new IAC valve, be sure to replace with an identical part. The IAC valve pintle shape and diameter are designed for the specificapplication and observe the following:

^

Measure the distance between the tip of the IAC valve pintle and the mounting flange. If greater than 28 mm, use finger pressure to slowlyretract the pintle. It may require a lot of pressure to retract the pintle of a NEW valve, however, this will not cause damage to the valve.

Reverse procedure for installation.

INSTALLATION NOTES

1. Be sure to thoroughly clean old gasket material from all surfaces before installation.

Be careful when doing this so as not to damage machined aluminum surfaces. Because aluminum is such a soft metal, it is recommendedCAUTION:

that power tools NOT be used for cleaning machined aluminum surfaces.

Throttle Body ID

2. If it is necessary to replace the throttle body, the correct part can be identified by the number stamped on the original part (see illustration.)

3. Tighten throttle body to plenum bolts to 18 lb.ft (25 Nm)

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > Customer Interest: > 67-63-05A

Throttle Cable/Linkage: Customer InterestAccelerator Pedal - Hard to Depress/Cable Separation

File In Section: 6E - Engine Fuel & Emission
Bulletin No.: 67-63-O5A
Date: August, 1997

Subject: Difficult to Depress Accelerator Pedal and/or an Accelerator Cable Separation (Install Accelerator Cable and Clip)

Models: 1994-97 Buick Regal, Skylark1994-96 Chevrolet Beretta, Corsica1995-97 Chevrolet Lumina, Monte Carlo1997 Chevrolet Malibu1994-97 Pontiac Grand Prix, Grand Am1993-97 Oldsmobile Cutlass Supreme1994-97 Oldsmobile Achieva 1997 Oldsmobile Cutlass with 3100 V6 Engine (VIN M - RPO L82)

This bulletin is being revised to remove Oldsmobile Cutlass Ciera from the models section. Please discard Corporate Bulletin Number 67-63-05 (Section6E - Engine Fuel & Emission).
Condition

Some owners may experience a premature separation of the accelerator cable. Additionally, some owners may comment about a difficult to depress accelerator pedal.
Cause

The accelerator cable comes out of the throttle cam groove on the throttle body. This happens when slack is allowed to accumulate in the cable and aloop is formed while the throttle is opened. When the throttle is relaxed, the loop of cable may not return to the groove in the throttle cam but comes torest along the side of the cam. A typical scenario can be either lifting up on the accelerator pedal while the cruise control is engaged and thendisengaging the cruise control or if the floor mat is allowed to bunch up under the accelerator pedal. The cable will return to the cam groove if thethrottle is depressed to near wide open throttle. The cable may become worn or broken if. it is allowed to wear against the throttle cam. If the cablebreaks, the throttle will return to idle.
Correction

If the accelerator cable is broken or shows any signs of wear on the stranded wire end at the throttle cam, replace the cable and install a cable retentionclip. If the cable is not broken and the cable shows no wear on the stranded wire end, install an accelerator cable retention clip. The accelerator cableretention clip can be installed by following the procedure below:

1. Hold the throttle wide open. This may easily be done from inside the vehicle by depressing the accelerator pedal.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > Customer Interest: > 67-63-

05A > Page 5790

Skylark V6-191 3.1L VIN M SFI (1994)

2.

Install the throttle clip over the cam groove (Figure 1) in line with the existing hole in the throttle cam thus capturing the accelerator cable in thegroove. Rotate the clip upward to insert the clip tang into the throttle cam hole. Rotate the clip downward and push to seat the clip tang in thethrottle cam.

3. Close the throttle slowly. Do not allow the throttle to snap shut.

4. Check the throttle system for proper operation.
Parts Information

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > Customer Interest: > 67-63-

05A > Page 5791

Skylark V6-191 3.1L VIN M SFI (1994)

Parts are currently available from GMSPO.
Warranty Information

For vehicles repaired under warranty, use as shown.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > All Technical Service Bulletins: > 67-63-05A

Throttle Cable/Linkage: All Technical Service BulletinsAccelerator Pedal - Hard to Depress/Cable Separation

File In Section: 6E - Engine Fuel & Emission
Bulletin No.: 67-63-O5A
Date: August, 1997

Subject: Difficult to Depress Accelerator Pedal and/or an Accelerator Cable Separation (Install Accelerator Cable and Clip)

Models: 1994-97 Buick Regal, Skylark1994-96 Chevrolet Beretta, Corsica1995-97 Chevrolet Lumina, Monte Carlo1997 Chevrolet Malibu1994-97 Pontiac Grand Prix, Grand Am1993-97 Oldsmobile Cutlass Supreme1994-97 Oldsmobile Achieva 1997 Oldsmobile Cutlass with 3100 V6 Engine (VIN M - RPO L82)

This bulletin is being revised to remove Oldsmobile Cutlass Ciera from the models section. Please discard Corporate Bulletin Number 67-63-05 (Section6E - Engine Fuel & Emission).
Condition

Some owners may experience a premature separation of the accelerator cable. Additionally, some owners may comment about a difficult to depress accelerator pedal.
Cause

The accelerator cable comes out of the throttle cam groove on the throttle body. This happens when slack is allowed to accumulate in the cable and aloop is formed while the throttle is opened. When the throttle is relaxed, the loop of cable may not return to the groove in the throttle cam but comes torest along the side of the cam. A typical scenario can be either lifting up on the accelerator pedal while the cruise control is engaged and thendisengaging the cruise control or if the floor mat is allowed to bunch up under the accelerator pedal. The cable will return to the cam groove if thethrottle is depressed to near wide open throttle. The cable may become worn or broken if. it is allowed to wear against the throttle cam. If the cablebreaks, the throttle will return to idle.
Correction

If the accelerator cable is broken or shows any signs of wear on the stranded wire end at the throttle cam, replace the cable and install a cable retentionclip. If the cable is not broken and the cable shows no wear on the stranded wire end, install an accelerator cable retention clip. The accelerator cableretention clip can be installed by following the procedure below:

1. Hold the throttle wide open. This may easily be done from inside the vehicle by depressing the accelerator pedal.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > All Technical Service

Bulletins: > 67-63-05A > Page 5794

Skylark V6-191 3.1L VIN M SFI (1994)

2.

Install the throttle clip over the cam groove (Figure 1) in line with the existing hole in the throttle cam thus capturing the accelerator cable in thegroove. Rotate the clip upward to insert the clip tang into the throttle cam hole. Rotate the clip downward and push to seat the clip tang in thethrottle cam.

3. Close the throttle slowly. Do not allow the throttle to snap shut.

4. Check the throttle system for proper operation.
Parts Information

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > All Technical Service

Bulletins: > 67-63-05A > Page 5795

Skylark V6-191 3.1L VIN M SFI (1994)

Parts are currently available from GMSPO.
Warranty Information

For vehicles repaired under warranty, use as shown.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > All Other Service Bulletins for Throttle Cable/Linkage: > 631508

Fuel Door: All Technical Service BulletinsFuel Filler Door - Will Not Open

File In Section: 10 - Body
Bulletin No.: 63-15-08
Date: April, 1996

Subject: Fuel Filler Door will not Open(Spray Lock De-Icer Into Cable/Apply Semi-Synthetic Lubricant)

Models: 1992-96 Buick Skylark1992-96 Oldsmobile Achieva1992-96 Pontiac Grand Am
Condition

Some owners may comment that the fuel filler door will not open.
Cause
The fuel filler cable may be frozen due to water entering into housing of cable.
Correction
This condition can be corrected by using the following procedure:

1. Bring vehicle into heated area to allow the fuel filler cable to thaw and the fuel filler door to open.

2. With fuel filler door open, spray lock de-icer into cable at the plunger/latch end of cable. Move plunger around and in to allow spray to enter cable.

3. Apply a semi-synthetic lubricant (non-water soluble) to the plunger on the fuel filler cable and depress plunger several times to allow lubricant to
enter housing of fuel filler cable (this will act as a barrier to entry of water into the fuel filler cable).

Warranty Information
For vehicles repaired under warranty, use:
Labor Operation Labor Time
R4085 0.2 hr

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > Page 5800

Throttle Cable/Linkage: Specifications

Accelerator Cable Bracket Nut ................................................................................................................................................................. 26 Nm (19 lbs. ft.)

Accelerator Cable Bracket Bolts ............................................................................................................................................................ 13 Nm (115 lbs. ft.)

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > Page 5801

Accelerator Pedal And Linkage, Passenger Compartment

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > Page 5802

Throttle Cable/Linkage: Adjustments

The accelerator control system is cable type. There are no linkage adjustments. The specific cable for each application must be used. Only the specificreplacement part will work.

Check for correct opening and closing positions by operating the accelerator pedal. Make sure that the throttle valve reaches the wide open and fullyclosed throttle positions. If it does not, inspect for damaged or bent brackets, levers, or other components, or for poor carpet fit under the acceleratorpedal.
If any binding is present in the linkage, check for:

1. Proper routing of the throttle cable.

2. Kinked or damaged cable.

3.
Free movement of:a.

Throttle lever at the throttle body.
b. Cable at throttle body or control lever/pulley.
c. Accelerator lever at bearing support.
d. Pedal at lever.

Whenever disconnecting or replacing parts, lubricate the pivot points with Accelerator Linkage Lubricant 1052541 or equivalent.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > Page 5803

Throttle Cable/Linkage: Service and Repair

Accelerator Control - Passenger Compartment

When performing service on the accelerator pedal, observe the following:NOTE:

a.

The mounting surface between the support and dash panel must be free of insulation. The carpet in the pedal and tunnel area must be positioned tolay flat and be free of wrinkles.

b.

Slip the accelerator control cable through the slot in the rod and then install the retainer rod, being sure it is seated. Care must be utilized inpressing the retainer into the hole in the rod to assure the cable is not kinked or damaged in any way.

c. After securing, all components of the accelerator linkage must operate freely without bind between full-closed throttle and wide-open throttle.
d. Wires, hoses, cables or other obstructions must not be placed within 13mm (1/2 inch) of cable or rod at any point in their travel.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Cable/Linkage > Component Information > Technical Service Bulletins > Page 5804

Skylark V6-191 3.1L VIN M SFI (1994)

Throttle And Cruise Control Cable Installation

REMOVAL:

1. Remove the lower instrument panel trim screws, retaining clip and lower instrument panel trim.

2. Remove the accelerator cable from the accelerator pedal.

3. Squeeze the accelerator cable cover tangs and push the cable through the dash panel (bulkhead).

4. Remove cable from restraints and throttle body bracket.

5. Remove cable.

INSTALLATION:

NOTE:

To prevent possible interference, flexible components (hoses, wires, conduits, etc.) must not be routed within 50 mm (2") of moving parts,unless routing is positively controlled by restraint clips or ties.

1. Reverse the removal procedure.
^

Check for complete throttle opening and closing positions by operating the accelerator pedal. Also check for poor carpet fit under theaccelerator pedal. The throttle should operate freely without binding between full closed and wide open throttle.

2. Apply a heavy bodied sealer around the accelerator cable at the engine compartment side of the dash panel (bulkhead).

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Technical Service Bulletins > Customer Interest: > 436504

Throttle Position Sensor: Customer InterestEngine Controls - Rough Running or Hesitation Condition

Group Ref.: Engine Fuel & Emission
Bulletin No.: 436504
Date: April, 1994

SUBJECT:ROUGH RUNNING OR HESITATION CONDITION (RE-ROUTE THROTTLE POSITION SENSOR WIRE LEAD AND REMOVE ADJUSTABLETIE STRAP)

MODELS:1994 BUICK SKYLARK VINs (SOP - RC270920) 1994 OLDSMOBILE ACHIEVA - VINs (SOP - RM020070 1994 PONTIAC GRAND AM - VINs (SOP - RC746875; OP - RM543936) WITH 3100 ENGINE (VIN M - RPO L82)
Condition:

Some owners may comment on a rough running or hesitation condition. Upon inspection, a Code 21 or 22 may be retrieved.
Cause:

The wire harness containing the throttle position sensor (TPS) connector, EGR solenoid lead, and idle air control (IAC) connector has been retained tothe ABS motor pack. The adjustable tie strap may restrict the movement of the TPS lead on some vehicles during engine torque roll. This restriction maycause some TPS wires to fray, break, or become detached from the connector.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Technical Service Bulletins > Customer Interest: >

436504 > Page 5810

Skylark V6-191 3.1L VIN M SFI (1994)

Correction: (See illustration)

1. Remove the adjustable tie strap at the ABS motor pack to the wire harness.

2. Re-route the wire lead for the IAC connector so the lead passes over crankcase vent tube instead of under it.

3. Re-route wire harness along left side of ABS motor pack.

4. Repair any damaged connectors with repair kit, J-38125-A.

Warranty Information:
For vehicles repaired under warranty, use:
Labor Operation: T3453
Labor Time: 0.3 Hr.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Technical Service Bulletins > All Technical Service Bulletins: > 436504

Throttle Position Sensor: All Technical Service BulletinsEngine Controls - Rough Running or Hesitation Condition

Group Ref.: Engine Fuel & Emission
Bulletin No.: 436504
Date: April, 1994

SUBJECT:ROUGH RUNNING OR HESITATION CONDITION (RE-ROUTE THROTTLE POSITION SENSOR WIRE LEAD AND REMOVE ADJUSTABLETIE STRAP)

MODELS:1994 BUICK SKYLARK VINs (SOP - RC270920) 1994 OLDSMOBILE ACHIEVA - VINs (SOP - RM020070 1994 PONTIAC GRAND AM - VINs (SOP - RC746875; OP - RM543936) WITH 3100 ENGINE (VIN M - RPO L82)
Condition:

Some owners may comment on a rough running or hesitation condition. Upon inspection, a Code 21 or 22 may be retrieved.
Cause:

The wire harness containing the throttle position sensor (TPS) connector, EGR solenoid lead, and idle air control (IAC) connector has been retained tothe ABS motor pack. The adjustable tie strap may restrict the movement of the TPS lead on some vehicles during engine torque roll. This restriction maycause some TPS wires to fray, break, or become detached from the connector.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Technical Service Bulletins > All Technical Service

Bulletins: > 436504 > Page 5813

Skylark V6-191 3.1L VIN M SFI (1994)

Correction: (See illustration)

1. Remove the adjustable tie strap at the ABS motor pack to the wire harness.

2. Re-route the wire lead for the IAC connector so the lead passes over crankcase vent tube instead of under it.

3. Re-route wire harness along left side of ABS motor pack.

4. Repair any damaged connectors with repair kit, J-38125-A.

Warranty Information:
For vehicles repaired under warranty, use:
Labor Operation: T3453
Labor Time: 0.3 Hr.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Technical Service Bulletins > All Other Service Bulletins for Throttle Position Sensor: > 531504

Trunk / Liftgate Hinge: All Technical Service BulletinsRear Compartment Lid Hinge Covers - Loose/Rattle

FILE IN SECTION: 10 - Body
BULLETIN NO.: 53-15-04
DATE: June, 1995

SUBJECT:Rear Compartment Lid Hinge Covers are Loose/Rattle (Replace Plastic Lid Hinge Cover Retainer/Add Foam Pad)

MODELS:1994-95 Buick Skylark1994-95 Oldsmobile Achieva1994-95 Pontiac Grand Am
CONDITION

Some owners may comment that the rear compartment lid hinge covers are loose/rattle or have fallen off.
CAUSE
Plastic retainer is worn out.
CORRECTION

To correct this condition, replace the plastic retainer with a metal retainer and add foam pad to rear compartment lid hinge cover using the followingprocedure.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Technical Service Bulletins > All Other Service Bulletins

for Throttle Position Sensor: > 531504 > Page 5816

Skylark V6-191 3.1L VIN M SFI (1994)

1. Remove RH/LH rear compartment lid hinge cover. Refer to Figure 1, Item 1.

2. Remove rear compartment lid hinge cover retainer. Refer to Figure 1, Item 2.

3. Install new rear compartment lid hinge cover retainer, P/N 22591829. Refer to Figure 1, Item 2.

4. Install a sticky back foam pad, 3 x 18 x 30 mm, to underside of RH/LH rear compartment lid hinge cover between the retainer hole and the cross.
Refer to Figure 1, Item 3.

5. Install RH/LH rear compartment lid hinge cover. Refer to Figure 1, Item 1.

PARTS INFORMATION
Parts are currently available from GMSPO.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Technical Service Bulletins > All Other Service Bulletins

for Throttle Position Sensor: > 531504 > Page 5819

Skylark V6-191 3.1L VIN M SFI (1994)

WARRANTY INFORMATION:
For vehicles repaired under warranty, use:
Labor Operation Labor Time

C4605 (Right) Use published labor
C4606 (Left) operation time.

1. Remove RH/LH rear compartment lid hinge cover. Refer to Figure 1, Item 1.

2. Remove rear compartment lid hinge cover retainer. Refer to Figure 1, Item 2.

3. Install new rear compartment lid hinge cover retainer, P/N 22591829. Refer to Figure 1, Item 2.

4. Install a sticky back foam pad, 3 x 18 x 30 mm, to underside of RH/LH rear compartment lid hinge cover between the retainer hole and the cross.
Refer to Figure 1, Item 3.

5. Install RH/LH rear compartment lid hinge cover. Refer to Figure 1, Item 1.

PARTS INFORMATION
Parts are currently available from GMSPO.

WARRANTY INFORMATION:
For vehicles repaired under warranty, use:
Labor Operation Labor Time

C4605 (Right) Use published labor
C4606 (Left) operation time.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Specifications > Electrical Specifications

Throttle Position Sensor: Electrical Specifications

Voltage At Idle 0.5 V

At Closed Throttle 0.29 - 0.98 V

At Wide Open Throttle 4.8 V

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Specifications > Electrical Specifications > Page 5822

Throttle Position Sensor: Mechanical Specifications

Throttle Position Sensor 18 in.lb

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Specifications > Page 5823

Throttle Position Sensor: Locations

Throttle Body, TPS, And IAC Valve Assembly

Pictorial View.

Installed on the throttle body.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagram Information and Instructions > Abbreviation

Throttle Position Sensor: Diagram Information and InstructionsAbbreviation
A/C Air Conditioning

CCM

Central Control Module

CKT

Circuit

CONN

Connector

EBCM Electronic Brake Control Module
EBTCM Electronic Brake and Traction Control Module

ECM

Engine Control Module

HARN

Harness

I/P

Instrument Panel

LH Left Hand
PCM

Powertrain Control Module

RH

Right Hand

TERM

Terminal

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagram Information and Instructions > Abbreviation > Page 5827

Body Part Names

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagram Information and Instructions > Abbreviation > Page 5828

Throttle Position Sensor: Diagram Information and InstructionsCell References
CELL REFERENCES

"CELL"

General Motors vehicles often use references in their electrical wiring diagrams. These references are used in the Original EquipmentManual to refer to a section in the manual and not a specific diagram(s).

GM Sample Diagram W/ Cell Reference

For instance, in the diagram illustrated "Cell 20" is not a reference to another diagram but a reference to "Section 20" in the OE manual. In theexample, "Section 20" is the engine control section of the manual.

Note:

If unsure of the system - try utilizing the search feature. Type a component in the search feature that belongs to the system and when theresults are displayed note the path displayed. This will show the system the component belongs in.

Diagrams / Electrical Diagrams

To navigate through these "Cell" references start at the vehicle level and go to: - for a complete list of the diagramsavailable for the vehicle. Choose the you are working on and view those diagrams. system

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagram Information and Instructions > Abbreviation > Page 5829

Throttle Position Sensor: Diagram Information and InstructionsElectrostatic Discharge (ESD Sensitive Devices)

All Electrostatic Discharge sensitive components are Solid State and the following information applies to them.(ESD)

ESD Symbol

Typical Schematic

The ESD symbol is used on schematics to indicate which components are ESD sensitive. When handling any electronic part, the service technicianshould follow the guidelines below to reduce any possible electrostatic charge build-up on the service technician's body and inadvertent discharge to theelectronic part. If it is not known whether or not a component is ESD sensitive, assume it is susceptible.

1. Always touch a known good ground before handling the part. This should be repeated while handling the pan and more frequently after slidingHandling Procedures

across a seat, sitting down from a standing position or walking a distance.

Measuring Procedures

The circuits shown within the boxes are greatly simplified. Do not troubleshoot by measuring resistance at any terminal of these devices unless soinstructed by a written diagnostic procedure. Due to the simplification of the schematics, resistance measurements could be misleading, or couldlead to electrostatic discharge.

2. Avoid touching electrical terminals of the part, unless so instructed by a written diagnostic procedure.3. When using a voltmeter, be sure to connect the ground lead first.4. Do not remove a part from its protective package until it is time to install the part.5. Before removing the part from its package, ground the package to a known good ground on the vehicle.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagram Information and Instructions > Abbreviation > Page 5830

Throttle Position Sensor: Diagram Information and InstructionsSchematic Symbols

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagram Information and Instructions >

Abbreviation > Page 5831

Skylark V6-191 3.1L VIN M SFI (1994)

Fig.1-Symbols (Part 1 Of 3)

Fig.2-Symbols (Part 2 Of 3)

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagram Information and Instructions >

Abbreviation > Page 5832

Skylark V6-191 3.1L VIN M SFI (1994)

Fig.3-Symbols (Part 3 Of 3)

Vacuum Motors operate like electrical solenoids, mechanically pushing or pulling a shaft between two fixed positions. When vacuum is applied, theshaft is pulled in. When no vacuum is applied, the shaft is pushed all the way out by a spring.
Double Diaphragm Motors can be operated by vacuum in two directions. When there is no vacuum, the motor is in the center "at rest" position.

Some Vacuum Motors such as the Servo Motor in the Cruise Control can position the actuating arm at any position between fully extended and fullyretracted. The servo is operated by a control valve that applies varying amounts of vacuum to the motor. The higher the vacuum level, the greater theretraction of the motor arm. Servo Motors work like the two position motors; the only difference is in the way the vacuum is applied. Servo Motors aregenerally larger and provide a calibrated control.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagram Information and Instructions > Abbreviation > Page 5833

Throttle Position Sensor: Diagram Information and InstructionsSupplemental Inflatable Restraint (SIR) System

SIR Symbol

The Supplemental Inflatable Restraint symbol is used on schematics to alert the technician to the following important caution.(SIR)

CAUTION: CAUTIONS

This vehicle is equipped with SIR. Refer to in SIR under Air Bags and Seat Belts before performing service on or around SIRcomponents or wiring. Failure to follow CAUTIONS could result in possible air bag deployment, personal injury, or otherwise unneeded SIR systemrepairs.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagram Information and Instructions > Abbreviation > Page 5834

Throttle Position Sensor: Diagram Information and InstructionsWire Color Code Identification

Black: BLK
Blue:

BLU

Brown: BRN
Grey:

GR Or GRY

Green:

GRN

Natural:

NAT

Orange:

ORN

Pink:

PNK

Purple:

PPL

Red: RED
Tan:

TAN

White: WHT
Yellow:

YEL

Dark: (example: DK GRN same as Dark Green)DK
Light:

(example: LT BLU same as Light Blue)LT

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagram Information and Instructions > Abbreviation > Page 5835

Wire Size Conversion Table

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagnostic Aids > General Troubleshooting Procedures > Additional Information

Throttle Position Sensor: Diagnostic AidsAdditional Information

NOTE:

Turn OFF power to the test circuit before attempting in-circuit resistance measurements to prevent false readings or damage to the meter. Donot use the meter to measure resistance through a solid state module.

"ohms"

Continuity tests that work well for detecting intermittent shorts to ground can be performed by setting the meter to then pressing the button. An audible tone will be heard whenever the meter detects continuity for at least ."PEAKMIN MAX" 1 millisecond

The J 39200 Instruction Manual is a good source of information and should be read thoroughly upon receipt of the meter as well as kept on hand forreference during new procedures.

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagnostic Aids > General Troubleshooting Procedures > Additional Information > Page 5839

Throttle Position Sensor: Diagnostic AidsBasic Knowledge Required

(amps) (ohms)

Without a basic knowledge of electricity, it will be difficult to use the diagnostic procedures contained in this section. You should understand the basictheory of electricity and know the meaning of voltage, current and resistance . You should understand what happens in a circuit with anopen or a shorted wire. You should be able to read and understand a wiring diagram.The following four-step troubleshooting procedure is recommended:

Step 1: Check the Problem

Perform a System Check to determine a symptom. Don't waste time fixing part of the problem! Do not begin disassembly or testing until you havenarrowed down the possible causes.

Step 2: Read the Electrical Schematic

Study the schematic. Read the Circuit Operation text if you do not understand how the circuit should work. Check circuits that share wiring withthe problem circuit. (Shared circuits are shown on Power Distribution, Ground Distribution, Fuse Block Details and Light Switch Details.) Try tooperate the shared circuits. If the shared circuits work, then the shared wiring is OK. The cause must be within the wiring used only by the problemcircuit. If several circuits fail at the same time, chances are the power (fuse) or ground circuit is faulty.

^Step 3: Find the fault and repair

Narrow down the possible causes.
^ Use the Troubleshooting Hints.
^ Make the necessary measurements or checks as given in the System Diagnosis.
^

Before replacing a component, check power, signal and ground wires at the component harness connector. If the checks and connections areOK, the most probable cause is component failure.

Repeat the System Check to verify that the fault has been corrected and that no other faults were induced during the repair.Step 4: Test the Repair

A customer brings in a vehicle and says that the HI beams do not work.EXAMPLE:

You may discover that both LO beams operate. In HI, you may notice that the HI Beam Indicator comes ON, but neither HI beam operates.Step 1: Perform a System Check on the Headlight Circuit

> Powertrain Management > Fuel Delivery and Air Induction > Throttle Position Sensor > Component Information > Diagrams > Diagnostic Aids > General Troubleshooting

Procedures > Additional Information > Page 5840

Skylark V6-191 3.1L VIN M SFI (1994)

Typical Headlights Schematic

Step 2: Read the Headlights Electrical Schematic

This is the step that will save time and labor. Remember, it is essential to understand how a circuit should work, before trying to figure out why itdoesn't.

After you understand how the circuit should operate, read the schematic again, this time keeping in mind what you have learned by operating thecircuit.

Since both LO beams work, you know that the Headlight Switch, the YEL wire, the LO contacts of the Headlight Dimmer Switch, terminal "IE" ofC100, the TAN wires and grounds G1O5 and G109 are all good.

Furthermore, since you saw that the HI Beam Indicator came ON when the Headlight Dimmer Switch was moved to HI you know that the HIcontacts of the Headlight Dimmer Switch and the LT GRN wire between the Headlight Dimmer Switch and C100 are good.

At this point, you could test for voltage at the RH Headlamp with the Headlight Dimmer Switch in HI. However, it is extremely unlikely that theHI beam filaments have burned out in both headlamps, or that both headlamps connections are bad. The cause must be a bad connection at C100,or a break in the LT GRN wire between C100 and the RH Headlamp.
You have quickly narrowed the possible causes down to one specific area, and have done absolutely no work on the vehicle itself.

Step 3: Find the fault and repair it

Using the Component Location List and the corresponding figure, you can quickly find C100 and the LT GRN wire, locate the exact trouble pointand make the repair.

This, of course, means making sure that both HI beams, both LO beams and the HI Beam Indicator are all working.Step 4: Check the repair by performing a System Check on the Headlights Circuit

Now suppose that the symptoms were different. You may have operated the Headlamps and found that the LO beams were working, but neitherthe HI beams nor the HI Beam Indicator were working. Looking at the schematic, you might conclude that it is unlikely that both HI beamfilaments and the HI Beam Indicator have all burned out at once. The cause is probably the Headlight Dimmer Switch or its connector.