On Board Diagnostic

P1502

Throttle Jacking Unit, Spring Test - Above Limit

Function
The position of the throttle is controlled by a digital position controller which emits a pulse-width-modulated (PWM) duty cycle and a direction bit.
After the output stage has been deactivated, the throttle is brought into emergency air position by means of two springs. This return of the throttle must take place within a certain time. If this time is exceeded, a fault is stored in the memory.

Diagnosis conditions
- Ignition on (approx. 30 sec.)
- Stationary vehicle
- Engine not running
- Engine temperature > 5 °C
- Intake air temperature > 5 °C

P1502:

Wiring Diagram







Diagnosis Procedure







1 Perform adaptation.
1. Switch on the ignition.
2. Wait one minute.
Do not press the accelerator.

3. Switch off the ignition for at least 10 seconds.
4. Read out the fault memory.