TM 5-3805-294-23-1
FIELD MAINTENANCE
DTC 158.17 - ENGINE CONTROL UNIT (ECU) POWER DOWN ERROR
INITIAL SETUP:
References (cont.)
Tools and Special Tools
Tool Kit, General Mechanic's: Automotive
Volume 3, WP 0362
(Volume 5, WP 0796, Table 2, Item 119)
Volume 3, WP 0375
Accessory Kit, MSD Electronic Equipment
Volume 4, WP 0508
(Volume 5, WP 0796, Table 2, Item 2)
Test Set, MSD Electronic Systems
Equipment Condition
(Volume 5, WP 0796, Table 2, Item 116)
Machine safely parked and shut down
(TM 5-3805-294-10). (Volume 5, WP 0794)
Personnel Required
Test Equipment Setup for MSD and Service
Construction Equipment Repairer 91L (1)
ADVISOR. (Volume 3, WP 0375)
References
TM 5-3805-294-10 (Volume 5, WP 0794)
Troubleshooting Sequence
DTC 158.17
When DTC is Displayed
DTC is active 164 seconds after ECU commands an internal electronic switch off.
Related Information
The ECU contains an electronic switch which is commanded OFF several seconds after the ECU detects ignition
as being OFF to reduce the amount of current drawn by the ECU. This DTC is generated if the ECU commands the
internal electronic switch OFF, but the switch does not respond within 164 seconds. This DTC is only active when
ignition is OFF.
Alarm Level
Warning.
Control Unit Response
The application battery may be discharged because the ECU will not power down.
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