26.3 TROUBLESHOOTING FLASH CODE 26
The following procedure will troubleshoot Flash Code 26.
Multiple Code Check
Perform the following steps to check for multiple codes.
1. Turn ignition ON. Start and run the engine.
2. Plug in DDR.
3. Read active codes.
[a] If codes s 25-11 or s 61-11 are logged, refer to section 26.3.2.
[b] If codes s 25-11 and s 61-11 are not logged, refer to section 9.1.
Check Calibration Configuration
Perform the following steps to check the calibration configuration:
1. Select ECM input/output configuration.
2. Determine cavity and wire number that is causing code to be logged.
3. Select switch/light status.
4. Determine status of that wire/cavity.
[a] If the switch reads OFF, refer to section 26.3.3.
[b] If the switch reads ON, the OEM supplied switch/relay is grounding the wire or
a short to ground exists. Determine OEM supplied device or repair the short.
Refer to section 26.3.4.
[c] If no OEM device is used, remove the wire from the connector and plug, or use
programming station to disable the function.
Confirm Switch Status
Perform the following steps to confirm switch status:
1. Start and run the engine for one minute.
2. Again, read switch status.
[a] If the switch reads OFF, the condition no longer exists. Contact the OEM to learn
which item is wired to this cavity. Refer to section 26.3.4.
[b] If the switch reads ON, the OEM supplied device is grounding this wire. Contact
the OEM for repair procedure. Refer to section 26.3.4.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION