LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Geo
>>
1990
>>
Tracker Base, Automatic
>>
Repair and Diagnosis
>>
Engine Performance
>>
System
>>
Engine Controls - System/Component Tests
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
Engine Controls - System/Component Tests
Expand All (for easy ctrl-f)
Collapse All
Introduction
Computerized Engine Controls
Electronic Control Module (ECM)
Ground Circuit Checks
Power Circuit Checks
ECM Circuit Resistance
Engine Sensors & Switches
Engine Controls - System/Component Tests
Coolant Temperature Sensor
EGR Temperature Sensor (Calif. Only)
Gear Position Switch (5th Gear M/T)
Manifold Absolute Pressure (MAP) Sensor
Manifold Air Temperature (MAT) Sensor
Oxygen Sensor
Power Steering Pressure Switch
Throttle Position Sensor
Park/Neutral Switch
Relays
Control Relay
Solenoids
Idle Speed Control Solenoid
Fuel System
Fuel Delivery
Notes
Vehicle Speed Sensor ECM Code 24
Fuel Control
Fuel Injector
Oxygen Sensor
Idle Control System
Engine Controls - System/Component Tests
Air Valve
Idle Speed Control Solenoid Function Test
Idle Speed Control Solenoid
Throttle Opener Vacuum Switching Valve (VSV)
Ignition System
Timing Control Systems
Engine Controls - System/Component Tests
Mechanical Advance
Vacuum Advance
Emission Systems & Sub-Systems
Exhaust Gas RECIRCULATION
EGR System Check
EGR Vacuum Supply
EGR Modulator
EGR Vacuum Switching Valve (VSV)
Fuel Evaporation
Charcoal Canister Check Valve (Metro)
Fuel Evaporation Canister
2-Way Valve Check
PCV
PCV Valve
Positive Temperature Coefficient (PTC) Heater
System Check (A/T)
Miscellaneous Controls
Notes
Transmission Controls
Lock-Up Solenoid Relay (A/T)