Checking the Ground Terminals

Checking the ground terminals

Checking the ground terminals

- Ignition off.
- Control unit disconnected.
- Switch off all battery loadings such as entrance lighting and radio.
Connect an ohmmeter between the battery negative lead and test box 14.

Additional information
- To connect the test box, see Connecting the Driver Information Module (DIM) test box Connecting the Breakout Box
- For information on signals and additional values, see Driver Information Module (DIM) signal description Signal Specification, Driver Information Module (DIM).

ohms
The ohmmeter should display approximately 0.

OK - DONE

Not OK - contact resistance and oxidation.

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Checking for open circuits, contact resistance and oxidation.
Check ground points 53/400 and 31/83 for an open circuit as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and for contact resistance and oxidation as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Additional information
- For information on ground points, see wiring diagram.

Continue - Verification

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Verification

Verification

Hint: After the repair it is necessary to check that the fault has been rectified.

The ohmmeter should display approximately 0 ohms.

OK - Verification complete

Not OK - Trouble-shooting information

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Trouble-shooting 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 ground terminals

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