1989 Geo Tracker Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Throttle Position Sensor (TPS)

THROTTLE POSITION SENSOR (TPS) RESISTANCE

Application Condition Resistance (Ohms)
Metro (1)
Between Terminals A-B (2) Continuity
Between Terminals A-B (3) No Continuity
Between Terminals A-D 4400-8100
Between Terminals A-C (4) 240-1140
Between Terminals A-C (5) 3170-6600
Metro (6)
Between Terminals A-B (7) Continuity
Between Terminals B-C (7) No Continuity
Between Terminals A-C (7) No Continuity
Between Terminals A-B (8) No Continuity
Between Terminals B-C (8) No Continuity
Between Terminals A-C (8) No Continuity
Between Terminals A-B (9) No Continuity
Between Terminals B-C (9) Continuity
Between Terminals A-C (9) No Continuity
Prizm (10)
Between Terminals E2-IDL (11) Continuity
Between Terminals E2-IDL (12) No Continuity
Spectrum (Green & Black/White wire)
Throttle 1/3 Open No Continuity
Throttle Open:
Auto. Trans .015" (.38 mm) Continuity
Man. Trans .011" (.28 mm) Continuity
Tracker
Between Terminals C-D
At Idle 0-500
Wide Open Throttle Infinite
Between Terminals A-D 3500-6500
Between Terminals B-D
At Idle 0-2000
Wide Open Throttle 2000-6500
(1) Models with Auto. Trans.
(2) With .012" (0.3 mm) gap between stop screw and lever.
(3) With .035" (0.9 mm) gap between stop screw and lever.
(4) Throttle valve at idle.
(5) Throttle valve fully opened.
(6) Models with Man. Trans.
(7) With .012" (0.3 mm) gap between stop screw and lever.
(8) With .035" (0.9 mm) gap between stop screw and lever.
(9) With throttle valve fully opened.
(10) Rotate throttle switch to obtain correct specification
(11) With .028" (0.7 mm) gap between stop screw and lever.
(12) With .032" (0.8 mm) gap between stop screw and lever.
Fig 1: Metro Throttle Position Switch Terminal Identification (A/T)
G121566Courtesy of GENERAL MOTORS CORP.
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