Detroit Diesel MBE 4000 DDEC VI Troubleshooting Manual page 317

31.1 SPN 168/FMI 0
SPN 168/FMI 0 is a battery voltage high fault.
31.1.1 Measure Battery Voltage
Measure the battery voltage as follows:
1. Measure battery voltage with the engine running at maximum rpm.
2. If greater than 16 volts, check for proper alternator operation and repair or replace, as
required. Refer to section 31.1.1.1.
31.1.1.1 Verify Repairs
Verify repairs as follows:
1. Turn the ignition OFF and reconnect all connectors.
2. Turn the ignition ON, and clear codes.
3. Start and run the engine for one minute. Stop the engine.
4. Check for codes
[a] If no codes are present, troubleshooting is complete.
[b] If code 168/0 is not logged but other codes are logged, troubleshoot the other codes.
[c] If code 168/0 and other codes are logged repeat troubleshooting procedure. If no
error is found, contact the Detroit Diesel Customer Support Center (313–592–5800).
All information subject to change without notice.
6SE568 Copyright © PRELIMINARY 2007 DETROIT DIESEL CORPORATION
(Rev. )
MBE 4000 DDEC VI TROUBLESHOOTING GUIDE
31-3