Faulty Signal. Intermittent Fault

Faulty signal. Intermittent fault

Checking the micro-switch








- Check the function of the micro-switch
- Check that the micro-switch appears undamaged
- Ignition on
- Operate the micro-switch manually
- Read off the status of the micro-switch.
The status should change from activation (micro-switch on) to non activation (micro-switch off).

Other information:
- For the location of the components, see Convertible system Component Locations
- For other values, see Opening and closing the convertible top Opening and Closing the Convertible Top
- To gain access to or replace the micro-switch for the front lock, see Replacing and adjusting micro-switches Replacing and Adjusting Micro-Switches
- There is a short-circuit to ground if the status is low when the switch inactive
- If the status is high with the micro switch activated there is an open-circuit or a short-circuit to supply voltage.

Hint: The micro-switch can be activated by hand or using a pointed tool. Be careful.





Does the status change?

Yes - Fault-tracing information

No - Checking the component

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Checking the component




- Ignition off.
Check the micro-switch connector. Check for an intermittent short-circuit to ground. See Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults. Check for contact resistance and oxidation. See Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Connect an ohmmeter between micro-switch connector terminal #1 and ground. The micro-switch must be in the unaffected position.
Check for a short-circuit to ground. See Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Try a new micro-switch if a short-circuit is found.
Connect an ohmmeter between micro-switch connector terminals #1 and #2. Check for an intermittent open-circuit. See Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Activate the micro-switch manually so that it is active throughout the time the reading is being taken.
Try a new micro-switch if an open-circuit is found.
If no faults are found there is probably a fault in the cable between the control module and the micro-switch connectors.
Remedy as necessary.

Other information:
- To access or replace the micro-switch for the front lock, see Replacing and adjusting micro-switches Replacing and Adjusting Micro-Switches.

Hint: The micro-switch can be activated by hand or using a pointed tool. Be careful.









Does the micro-switch function?

Yes - Fault-tracing information

No - Checking the connectors

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Checking the connectors
Check control module connector A. Check for an intermittent short-circuit to ground. See Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults. Check for contact resistance and oxidation. See Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the convertible control unit breakout box Connecting the Breakout Box
- To access and replace the control module see Replacing the control module Service and Repair.









Select Continue when the fault has been remedied.

Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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FAULT-TRACING FAILED - DONE

Attempt New Test - Checking the micro-switch

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