TROUBLESHOOTING FLASH CODE 46
Check ECM Connectors
Perform the following steps to check ECM connectors.
1. Check terminals at the ECM 5-way power harness connector (both ECM and harness side)
for damage; bent, corroded, and unseated pins or sockets.
[a] If terminals and connector are damaged, repair them. Refer to section 46.3.8.
[b] If terminals and connector are not damaged, verify the power and ground are wired
directly to the battery. Refer to section 46.3.7.
Perform the following steps to check for codes.
1. Install the vehicle interface module.
2. Turn ignition ON; plug in DDR.
3. Check for codes.
[a] If code reoccurs, install test ECM, then refer to section 46.3.8.
[b] If code does not reoccur, check power harness wires for breaks, abrasions, etc.
Then refer to section 46.3.8.
Perform the following steps to verify repairs.
1. Turn vehicle ignition OFF.
2. Reconnect all connectors.
3. Turn ignition ON.
4. Clear codes with DDR.
5. Start and run the engine for one minute.
6. Stop engine.
7. Check DDR for codes.
[a] If no codes are displayed, troubleshooting is complete.
[b] If code 168/1 is not logged, and other codes are logged, refer to section 9.1.
[c] If code 168/1 is logged, and other codes are logged, all system diagnostics are
complete. To troubleshoot the error, refer to section 46.3.1.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION