Electronic Idle Speed Control Test

Test Values
- Coolant temperature:
^ Above 42°C (108°F) - approx. 500 idle rpm
^ Below 42°C (108°F) - approx. 750 idle rpm

Conventional Tools
^ Tachometer - e.g. Sun Electric
^ Digital multimeter (volt-ohmmeter) - e.g. Sun Electric DMM-5

Wiring Diagram





20. Temperature switch 42°C (108°F) coolant
21. Electronic idle speed control unit
23. Idle speed adjuster
30. Lambda control relay with excess voltage protection
a) to electronic lambda control unit, term 8
b) to relay for air injection
c) to throttle valve switch via terminal 6 of electronic lambda control unit
e) to fuse box, circuit 15

Wire Color Code
bl = blue
br = brown
ge = yellow
gn = green
rt = red
sw = black

V��Test Procedure:

Fig. 1:

Fig. 2:

Fig. 3:

Fig. 4:

Fig. 5: