Test Point 6 - Idle Speed Control
TEST POINT 6 - Idle speed control (V) - Fault code 1_22Possible Causes, Elimination, Remarks
Call up actuator activation menu point.
If no pulse is audible, check: Power supply.
- Connect voltmeter to terminal 2 of disconnected idle speed actuator plug and ground with the test leads. Switch on the ignition.
Display: battery voltage.
No display: Check power supply according to wiring diagram.
Checking the control signal
- Insert 2-pin DME test lead (Bosch No. 1 684 463 093) between rotary actuator and plug connection.
- Connect engine tester as stated in manufacturer's instructions, and adjust.
- Make sure that there is no contact between the lead connections and ground on the vehicle (risk of short circuit).
- With the engine running, the following display must be seen:
Frequency approx. 100 Hz.
If there is no audible pulse in spite of the power supply and the signal being present, renew the idle speed control.