Micro Computer Unit (Mcu) - Jeep 1987 Wrangler Workshop Manual

ENGINES
FUEL FEEDBACK SYSTEMS
•111!
S E E
I.S.
N
O
T
E
S
Inputs
1. Coolant Temperature Switch
2. Thermal Electric Switch
3. Four- and Ten-Inch Hg Vacuum Switches
4. Oxygen Sensor
5. Wide Open Throttle (WOT) Switch
6. Knock Sensor
7. Distributor
Outputs
8. Stepper Motor
9. Idle Relay
10. Sole-Vac Throttle Positioner
11. Upstream and Downstream Solenoids
12. PCV Solenoid
MItro
Computer
Unit
(MCU)
The MCU is a microprocessor that monitors
various engine operating conditions.
B a s e d upon t h e s e conditions, the M C U
generates output control signals to provide the
correct air/fuel mixture, proper ignition timing
and engine idle speed.
The MCU is a permanently sealed module
located in the passenger compartment.
85050
85046