17-4
1.2 Electronic control system
(1) System block diagram
Input signals
Engine electronic control unit
Output signals
Exhaust gas recircula-
tion control function
Engine speed sensor
Water temperature sensor
Accelerator pedal position
sensor
Fault diagnosis
function
Engine warning lamp
Electronic drive unit relay
EGR: Exhaust gas recirculation
EDU: Electronic drive unit
Memory clear switch
Multi-Use Tester connector
Diagnosis switch
Intake air temperature
sensor
: Electrical signal
: Controller area network signal
EGR EDU
EGR magnetic valve
STRUCTURE AND OPERATION
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