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Pinpoint Test E: Control Module Tests

E1: CONTROL MODULE TEST 1 

NOTE: When connecting the MOST tester, use the 2+0 or 2+4 socket as appropriate and set the connector selector switch to match the socket in use
  1. Connect the MOST tester to the relevant control module using the adapter harness

    2. Did the MOST tester emit a tone or illuminate the LED? 

    YES:  MOST signal received. Tests inconclusive. Reconnect the MOST harness connector to the control module and confirm that the MOST network fault is still present. Repeat the tests from the beginning. GO to Pinpoint Test B .

    NO:  GO to E2  .

E2: CONTROL MODULE TEST 2 

  1. Refer to the electrical circuit diagrams and test the relevant control module power and ground circuits for open circuit, high resistance

    2. Are the power and ground circuits within specification? 

    YES:  GO to E3  .

    NO:  Repair the power and/or ground circuit

E3: CONTROL MODULE TEST 3 

  1. Reconnect the MOST harness connector to the control module
  2. Check the touch screen display for indication of a MOST network fault

    3. Has the MOST network been restored? 

    YES:  Tests inconclusive. Repeat the tests from the beginning. GO to Pinpoint Test B .

    NO:  Install a new control module

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