EXPERTEC TSB (90-202-6E)

Publication date: 1990-03-21
Reference number: 90-202-6E

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): 90-202-6E, Date of Issue: 03/21/90

SERVICE MANUAL UPDATE-SEC. 6E - TPS SPEC-DRIVEABILITY/EMISSION

Model(s): 1989-90 M CAR WITH 1.0L (VIN CODE 6) ENGINE

Bulletin No.: Chevrolet 90-202-6E

Date: 03/21/1990

BULLETIN ILLUSTRATION LIST

Fig 1: Graphic

Fig 2: Graphic

Fig 3: Graphic

Fig 4: Graphic

Fig 5: Graphic

SERVICE INFORMATION

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 Geo Metro 1.0L (VIN 6) "M" Carline Service Manual. The attached page reflects the revised Throttle Position Sensor Adjustment and revised Fig 5 .

THROTTLE POSITION SENSOR (TPS) (A/T ONLY)

REMOVE OR DISCONNECT TPS

See Fig 3 .

Air cleaner assembly.
TPS connector.
2 retaining screws for TPS.
TPS from throttle body.

INSTALL OR CONNECT

See Fig 3

TPS to throttle body. 2. Adjust TPS.

ADJUST

Connect DVM on "ohms" scale to TPS terminals "A" and "B". See Fig 4 .
Insert 0.3mm (.012") feeler gage between throttle stop screw and throttle lever. See Fig 1 .
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.).
Remove feeler gage. DVM should still indicate zero ohms (continuity, switch closed).
Insert 0.9mm (.035") feeler gage between throttle stop screw and throttle lever. DVM should now indicate an open circuit (no continuity, switch open).
Connect TPS electrical connector.