Fuel injection
Disconnect the stepper connection.
Check the resistance of the stepper circuits
connecting the tester as shown in the diagram.
The two measurements must have the same value.
Resistance = ~ 51 Ω
YES
Connect the special tool 020481Y. See page 9-8
For these controls do not connect the special
tool to the control unit.
Check continuity of the 4 feed wires
of the stepper.
A Light blue-red-14 = 0 Ω (continuity)
B Orange-blue-6 = 0 Ω (continuity)
C Light blue-yellow-21 = 0 Ω (continuity)
D Light blue-black-24 = 0 Ω (continuity)
Check the earthing isolation of the 4
wires of the stepper.
14-23 = >1MΩ (infinity)
6-23 = >1MΩ (infinity)
21-23 = >1MΩ (infinity)
24-23 = >1MΩ (infinity)
9 - 92
Proceed with control of the stepper circuit.
Proceed with replacement of the throttle body.
See Chapter. 7-THERMAL UNIT AND TIMING SYSTEM.
YES
NO
YES
NO
YES
NO