50.1 SPN 609/FMI 12
This diagnostic condition is typically MCM failed or programmed incorrectly.
50.1.1
MCM Parameter Check
Check as follows:
1. Using your diagnostic tool, reset the parameters on the MCM.
[a] If fault code 233/12 is not active after resetting parameters, troubleshooting is
finished.
[b] If fault code 233/12 is still active after resetting parameters, go to step 2.
2. Check the MCM parameters to ensure they are correct for the vehicle configuration.
[a] If parameters are not correct, reset parameters on the MCM.
[b] If parameters are correct, contact Detroit Diesel Customer Support Center
(313–592–5800) for authorization to replace the MCM. Set parameters on the new MCM.
50.2 SPN 609/FMI 14
This diagnostic condition is typically MCM incorrect or not programmed correctly.
50.2.1
MCM Check
Check as follows:
1. Check to ensure the MCM is correct for the engine.
[a] If MCM is correct for the engine, go to step 2.
[b] If MCM is not correct for the engine, contact Detroit Diesel Customer Support
Center (313–592–5800) for authorization to replace the MCM. Set parameters on
the new MCM.
2. Reset the MCM parameters.
[a] If fault code 233/14 is not active after the MCM parameters are reset, troubleshooting
is complete.
[b] If fault code 233/14 is still active after the MCM parameters are reset, go to step 3.
3. Check the MCM parameters to ensure they are correct for the vehicle configuration.
[a] If the MCM parameters are not correct, reset the parameters.
[b] If the MCM parameters are correct, contact Detroit Diesel Customer Support Center
(313–592–5800) for authorization to replace the MCM. Set the parameters on the new MCM.
