Seintek S2800 - EGR Control Sol; ISC Step Motor

10-16
10.2.5. EGR Control Sol
Measures and compares Pulse Width Modulated signals that control exhaust gas re-circulation
solenoid valves.
Path:
Î Î
Î
EGR Control sol.
EGR CONTROL SOL
BLACK TO ENGINE
RED TO SOLENOID
To engine (chassis)
To EGR solenoid
Duty cycle changes with engine
conditions.
Normal EGR Control sol. waveform
10.2.6. ISC Step Motor
Measures and compares an idle speed control step motor signal.
Path:
Î Î
Î
ISC Step Motor
ISC STEP MOTOR
BLACK TO ENGINE
RED TO THE SIGNAL WIRE AT
ISC CONNECTOR
To negative battery terminal
To the signal wire at
ISC connector
Check for asynchronous
waveform.
Normal ISC Motor waveform