Checking the ground terminals

Fig 1: Identifying Ignition Switch OFF Position

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• 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
  • For information on signals and additional values, see Driver Information Module (DIM) signal description .
  Fig 2: Identifying Breakout Box

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  Fig 3: Identifying Ohmmeter

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The ohmmeter should display approximately 0 Ω. 

• OK 

  OKAY:  Troubleshooting has been completed.

• NOT OK 

  Refer to Checking for open circuits, contact resistance and oxidation.