LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Mercury
>>
1981
>>
Lynx LS, Automatic Trans
>>
Repair and Diagnosis
>>
Engine Performance
>>
Engine Control Systems
>>
MCU Engine Control System
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
MCU Engine Control System
Expand All (for easy ctrl-f)
Collapse All
Description
Operation
Microprocessor Control Unit (MCU)
Engine Sensors
Coolant Temperature
Engine Load Sensor
Oxygen Sensor
Engine Speed
Knock Sensor
Self-Test Connector
Engine Controls
Notes
Thermactor Controls
Air/Fuel Controls
Canister Purge Solenoid
Throttle Kicker
Ignition Control
Diagnosis & Testing
Notes
Equipment Required
Preparation For Testing
Functional Test
Notes
Key On, Engine Off Test
Engine Running Test (4 and 6 Cylinder)
Engine Running Test (V8)
Non-Code Tests
Notes
Canister Purge Check (6 Cyl.)
Spark Retard Solenoid Check (6 Cyl.)
Cold Drive Complaint (4 and 6 Cyl.)
Closed or Light Throttle Drive Complaint (All)
Spark Knock Test (V8)
Instructions For Using Sub-Routine Tests
4 & 6 Cylinder Sub-Routines
V8 Sub-Routines