Resistance =
approx. 51 Ω
YES go to 11 NO go to 10
9 - Test successful.
No variations of revolutions.
Remove the throttle body.
Check the auxiliary air circuit cleaning. Switch from
"ON" to "OFF" and again to "ON" and check wheth-
er the piston valve moves. If the valve does not
move, replace the throttle body.
10 - Replace the throttle body
11 - Connect the special tool.
For these checks, do not connect the special tool to the control unit. Check the continuity of the 4 power
supply lines of the Stepper.
Specific tooling
020481Y Control unit interface wiring
Electric characteristic
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)
Beverly 500 i.e. Injection
INJEC - 257
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