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)

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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 Electronic Module (AEM), Replacing
- Signal specification Signal Specification, Accessory Electronic Module (AEM)
- 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
- 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 - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information

FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking the power supply

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