SERVICE MANUAL UPDATE-SEC. 6E TPS SPEC-DRIVEABILITY/EMISSION
VEHICLES AFFECTED: 1989-90 1.0L "M" (VIN 6)
This bulletin serves to revise the Throttle Position Sensor (TPS) Adjustment Procedure (A/T only) in Section 6E2-C2 "driveability And Emissions" in the 1989 and 1990 1.0L (VIN 6) "M" Carline Service Manual.
The attached page reflects the revised Throttle Position Sensor Adjustment and revised Figure C2-32.
THROTTLE POSITION SENSOR(TPS)(A/T Only)
Remove or Disconnect (Figure C2-30)
1. Air cleaner assembly. 2. TPS connector. 3. 2 retaining screws for TPS. 4. TPS from throttle body.
Install or Connect (Figure C2-30)
1. TPS to throttle body.
2. Adjust TPS.
Adjust
1. Connect DVM on "ohms" scale to TPS terminals "A" and "B". See Figure C2-31.
2. Insert 0.3mm (.012") feeler gage between throttle stop screw and throttle lever. See Figure C2-28.
3. With retaining screws loosely installed, turn TPS fully clockwise, then slowly counterclockwise just until DVM indicates zero ohms (continuity, switch closed). Tighten retaining screws to 2.0 N-m (18 lb. in.).
4. Remove feeler gage. DVM should still indicate zero ohms (continuity, switch closed).
5. Insert 0.9mm (.035") feeler gage between throttle stop screw and throttle lever. DVM should now indicate an open circuit (no continuity, switch open).
6. Connect TPS electrical connector.
7 Install air cleaner.
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.
