TM 5-3805-294-23-1
FIELD MAINTENANCE
DTC 637.08 - CRANKSHAFT POSITION SIGNAL MISSING
INITIAL SETUP:
References (cont.)
Tools and Special Tools
Tool Kit, General Mechanic's: Automotive
Volume 3, WP 0345
(Volume 5, WP 0796, Table 2, Item 119)
Volume 3, WP 0362
Accessory Kit, MSD Electronic Equipment
Volume 3, WP 0369
(Volume 5, WP 0796, Table 2, Item 2)
Volume 3, WP 0376
Multimeter, Digital
Volume 3, WP 0405
(Volume 5, WP 0796, Table 2, Item 77)
Volume 3, WP 0410
Probe Set, Standard
Volume 4, WP 0508
(Volume 5, WP 0796, Table 2, Item 91)
Volume 4, WP 0509
Test Set, MSD Electronic Systems
Volume 4, WP 0510
(Volume 5, WP 0796, Table 2, Item 116)
Volume 4, WP 0511
Volume 5, WP 0800
Personnel Required
Construction Equipment Repairer 91L (2)
Equipment Condition
Machine safely parked and shut down
(TM 5-3805-294-10). (Volume 5, WP 0794)
References
Test Equipment Setup for MSD and Service
TM 5-3805-294-10 (Volume 5, WP 0794)
ADVISOR. (Volume 3, WP 0375)
Troubleshooting Sequence
DTC 637.05 or 637.06
DTC 637.08
When DTC is Displayed
The engine is cranking or running and the error condition is active.
Related Information
The ECU does not detect a crankshaft position signal when engine is cranking or running.
This DTC may be caused by an open or shorted circuit in the sensor wiring.
Alarm Level
Warning.
Control Unit Response
The ECU will use the high-pressure fuel pump position signal input to determine piston position.
Prolonged cranking time may be required to start the engine.
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