Self-Check Diagnostics
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
The CMTC is capable of performing a diagnostic self check on its internal functions. CMTC diagnostics may be performed using a DRBIII® or by using the following procedure:
- With the ignition switch in the OFF position, depress and hold the STEP and the US/M buttons.
- Turn the ignition switch to the On position and release the buttons.
- All of the VFD segments will illuminate for 2-4 seconds. Check for segments that do not illuminate or illuminate all the time.
- When the self-check is complete the CMTC will display one of the following five messages:
- F (FAIL)
- P (PASS)
- Bus (No PCI bus communication)
- Bus 1 (No PCM bus messages received)
- Bus 2 (No BCM bus messages received)
- To exit the self-check mode, depress the STEP button or cycle the ignition switch and the CTM will return to normal operation.
If a Bus fault is displayed, refer to the appropriate test. If an F is displayed, the CMTC must be replaced. The CMTC will not display an F for a VF segment that does not illuminate.