Checking The 15-Supply

Checking the 15-supply

Checking the cable




- Check control module connector A. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Ignition off.
Connect an ohmmeter between control module connector A7 and ground.
Test for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.

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









Was a short-circuit found?

Yes - Verification

No - Checking the cable, continued

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Checking the cable, continued




- Check control module connector A for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Ignition on.
Connect a voltmeter between control module connector A7 and ground.
Ignition on.

If the voltage is low (approximately 0 V) there is an open-circuit in the cable or fuse 29 has blown.
Remedy as necessary.

Other information:
- To access and replace the control module see Replacing the control module Service and Repair
- The voltage for the 15-supply should be 12-15 V with the ignition on.









Select Continue when the fault has been remedied.

Continue - Verification

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Verification




Verification

Note! After carrying out the repair, check that the fault has been remedied.








- Reinstall components, reconnect connectors etc.
- Speed < 4 km/h
- Trunk lid closed
- Ignition off.
Activate the control switch for convertible top operation.
It should not be possible to operate the convertible top when the ignition is off.

Can the convertible top be operated?

Yes - VERIFICATION FAILED

No - Verification, continued

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Verification, continued




- Ignition on.
Activate the control switch for convertible top operation.
It should be possible to operate the convertible top when the ignition is on.

Does the convertible top function correctly?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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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 cable

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