Signal Too Low

Signal too low

Checking the power supply




- Ignition off.

Check the voltage to ground at the following points:
- rear main fuse
- rear fuse.
The voltage must be at least battery voltage minus 3 V.
Check that the fuses are intact.
Remedy as necessary.









Was the fault found?

Yes - Verification

No - Checking the power supply and ground at the accessory electronic module (AEM)

-------------------------------------------------

Checking the power supply and ground at the accessory electronic module (AEM)
Check the power supply to the accessory electronic module (AEM). Check between the breakout box terminals for power supply (terminal #52) and ground (terminal #51). The voltage must be at least battery voltage minus 3 V.
Check the control module connector. Check for contact resistance and oxidation. Check for loose connections. Check for damage carefully.
Check the wiring between the accessory electronic module (AEM) (breakout box for ground terminal #51) and ground. Check for an open-circuit.
Remedy as necessary.

Other information:
- Connecting the breakout box Connecting the Breakout Box, Accessory Electronic Module (AEM)
- Accessory control module (AEM) Accessory Control Module (AEM)
- Signal specification Signal Description, Accessory Electronic Module (AEM)
- Checking wiring and terminals Checking Wiring and Terminals.





Continue - Verification

-------------------------------------------------

Verification




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








- Ignition off
- Reconnect the components, connectors etc.
- Ignition on.
Read off the power supply for the Accessory Electronic Module (AEM) by clicking on the VCT2000 symbol.
The voltage must be at least battery voltage minus three volts.





Is the voltage OK?

Yes - Troubleshooting procedure complete

No - Fault-tracing information

-------------------------------------------------

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

------------------------

Attempt New Test - Checking the power supply

-------------------------------------------------