TM 5-3805-294-23-1
FIELD MAINTENANCE
DTC 637.02 - CRANKSHAFT POSITION SIGNAL INVALID
INITIAL SETUP:
References (cont.)
Tools and Special Tools
Tool Kit, General Mechanic's: Automotive
Volume 3, WP 0369
(Volume 5, WP 0796, Table 2, Item 119)
Volume 3, WP 0376
Accessory Kit, MSD Electronic Equipment
Volume 3, WP 0402
(Volume 5, WP 0796, Table 2, Item 2)
Volume 3, WP 0405
Multimeter, Digital
Volume 3, WP 0410
(Volume 5, WP 0796, Table 2, Item 77)
Volume 4, WP 0508
Probe Set, Standard
Volume 4, WP 0509
(Volume 5, WP 0796, Table 2, Item 91)
Volume 4, WP 0510
Test Set, MSD Electronic Systems
Volume 4, WP 0511
(Volume 5, WP 0796, Table 2, Item 116)
Volume 4, WP 0521
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)
Volume 3, WP 0345
Volume 3, WP 0362
Troubleshooting Sequence
DTC 637.08
DTC 637.02
When DTC is Displayed
The engine is cranking or running and the error condition is active.
Related Information
The ECU detects extra pulses (electronic noise) in the crankshaft position signal.
The extra pulses may be caused by electromagnetic interference or by a sensor signal wire that is shorted to some
other signal wire.
Wiring problems, such as loose terminals or water in connectors may also cause this DTC.
Alarm Level
Warning.
Control Unit Response
Prolonged cranking time may be required to start the engine.
0057-1