Signal Too Low

Signal too low

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 less than 0.15 volts, there is either a short-circuit to ground 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 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 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 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)
- Signal specification Signal Description, Central Electronic Module (CEM)
- Control module relay box passenger compartment Service and Repair
- 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 - Troubleshooting procedure complete

No - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking the component and wiring

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