P1140

P1140
Load Calculation - Signal implausible.

Function:
A load signal is generated to determine the engine load. This signal is calculated from the intake air mass (signal from the mass air flow sensor) and the engine speed. This load signal is corrected by the intake air temperature and a taught altitude factor for the purpose of adaption to the air density.

Diagnostic Conditions:
- Engine at idle.
- Throttle valve angle between 10° and 60°.
- No fault in mass air flow sensor.
- No fault in throttle position sensor.
- No fault in idle air control valve.
- Speed > 4 km/h
- Time after engine start-up > 240 seconds.
- Time for fault detection > 25 seconds.

Diagnostic Procedure:



1. Readjust operating cable for cruise control.



1. Loosen snap ring 1 at adjusting piece 2 (displace it) and push threaded part 3 through along with cruise-control cable.
2. Engage cruise-control cable on cruise-control actuator and clip on adjusting piece 4 (bayonet lock).
3. Unscrew threaded part 5 until the accelerator plate is noticeably pulled.
4. Draw accelerator plate firmly back against its idle stop.



5. Push snap ring 6 back (fixing it).
6. Make fine adjustment by turning the threaded part 7.

Permissible play: 0 + 1 mm.

2. Read specified values for Throttle Position Sensor.
1. Connect and switch on Porsche System Tester 2.
2. Switch to menu point "Specified values".
3. Select Throttle Position Sensor.
4. Read specified value for closed Throttle Power Sensor.

Specified value: approximately 0 %.

5. Fully depress accelerator pedal.
6. Read specified value for wide open Throttle Position Sensor.

Specified value: approximately 70 - 80 %.

NOTE: It is important that the value change and not stay fixed at one value.