Self-Check Diagnostics

The CT/CMTC/EVIC is capable of performing a diagnostic self check on its internal functions. Diagnostics may be performed using a DRBIII® or by using the following procedure:

1. For CMTC/EVIC: With the ignition switch in the OFF position, depress and hold the RESET and the STEP buttons.

   For CT: With the ignition switch in the OFF position, depress and hold the C/T and the US/M buttons.

2. Turn the ignition switch to the ON position.
3. Continue to hold both buttons until the software versions are displayed, then release the buttons.
4. All of the VFD segments will illuminate for 2-4 seconds. Check for segments that do not illuminate or illuminate all the time.
5. When the self-check is complete the EVIC will display one of the following messages:
   • PASS SELF TEST
   • FAILED SELF TEST
   • NOT RECEIVING J1850 MESSAGE

     When the self-check is complete the CT/CMTC will display one of the following messages:

   • PASS
   • FAIL
   • BUS

1. To exit the self-check mode:

For the CMTC/EVIC: Depress the STEP or RESET button, or cycle the ignition switch and the CMTC/EVIC will return to normal operation.

For the C/T: Depress the C/T or US/M button, or cycle the ignition switch and the CT will return to normal operation.

If a Communication fault is displayed, refer to the symptom list. If a FAIL or FAILED is displayed, the CT/CMTC/EVIC must be replaced.