Operation CHARM: Car repair manuals for everyone.

Signal Missing






Signal missing. Permanent fault

Checking control panel terminals
Check that the control panel is correctly connected to the seat.
Check the control circuit between #C4 and #C5. Check for an open-circuit. See Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary

Other information:
- To connect the breakout box, see Connecting the breakout box, power seat module (PSM) Connecting the Breakout Box, Power Seat Module (PSM)
- For information about signals, see Signal specification, Power seat module Signal Specification, Power Seat Module (PSM).













Was a fault detected?

Yes - Fault Found

No - Replacing the component

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Replacing the component
Replace the control panel. See Side panel, replacing Removal and Replacement.


Continue - Fault Found

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