LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Pontiac
>>
1990
>>
LeMans Base
>>
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
ECM Ground Circuit
Power Circuit
Engine Sensors & Switches
Coolant Temperature Sensor
Exhaust Gas Oxygen (O2) Sensor
Hall Effect Sensor (Pick-Up)
Manifold Absolute Pressure (Map) Sensor
Manifold Air Temperature (Mat) Sensor (2.0L)
Park/Neutral (P/N) Switch
Throttle Position Sensor (TPS)
Shift Light (Manual Transmissions)
Vehicle Speed Sensor (VSS)
Relays, Solenoids & Modules
Relays
A/C Clutch Control & Relays
Cooling Fan Relays
Solenoids
Torque Converter Clutch (TCC) Solenoid
Modules
Ignition Module
Fuel System
Notes
Fuel Delivery
Fuel Injector Control
Fuel Injector Solenoid
Idle Control System
Engine Controls - System/Component Tests
Idle Air Control Valve (IACV)
Ignition System
Notes
Ignition Coil Testing
Timing Control Systems
Electronic Spark Timing (Est) Function
Emission Systems & Sub-Systems
Evaporative Emission Control System (EECS)
Testing Diaphragm-Operated Purge Valve
Exhaust Gas RECIRCULATION (EGR)
EGR Valve
PCV System
1.6L
2.0L
Thermostatic Air Cleaner (THERMAC)
Fault Diagnosis (1.6L)
Testing
Miscellaneous Controls
Notes
A/C Clutch
A/C Clutch Control & Relays
Cooling Fan
Cooling Fan Relays
Transmission
Park/Neutral (P/N) Switch
Torque Converter Clutch (TCC) Solenoid
Shift Light (Manual Transmissions)