Faulty Signal

Faulty signal

Checking the status




- Ignition on.
Check the signal from the accelerator pedal (AP) position sensor.
Click on the VCT2000 symbol to read off the signal level.
Slowly depress and release the accelerator pedal (AP). Note the change in the signal level.
The voltage level in the accelerator pedal (AP) position sensor must be between 0.15 and 4.85 volts.

Hint: If the signal from the accelerator pedal (AP) position sensor indicates >4.85 volts, there is either short-circuit to supply voltage in the signal cable or the accelerator pedal (AP) position sensor is defective.





Does the value change?

Yes - Verification

No - Checking the component and wiring

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Checking the component and wiring
Check the signal cable between central electronic module (CEM) terminal #G22 (#22) and accelerator pedal (AP) position sensor connector terminal #1. Check for an open-circuit. Check for a short-circuit to ground.
Check the signal cable between central electronic module (CEM) terminal #G31 (#31) and accelerator pedal (AP) position sensor connector terminal #2. Check for an open-circuit. Check for a short-circuit to ground.
Check the signal cable between central electronic module (CEM) terminal #G7 (#7) and accelerator pedal (AP) position sensor connector terminal #3. Check for an open-circuit. Check for a short-circuit to ground.
Try replacing the accelerator pedal (AP) position sensor if no fault is found in the wiring.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Checking wiring and terminals Checking Wiring and Terminals













Continue - Verification

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Read off the accelerator pedal (AP) position sensor by clicking the VCT2000 symbol.
Check that the value is between 0.15 and 4.85 volts.





Is the value OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information

Attempt New Test - Checking the component and wiring

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