TM 5-3805-294-23-1
FIELD MAINTENANCE
DTC 636.08 - HIGH-PRESSURE FUEL PUMP POSITION SENSOR SIGNAL MISSING
INITIAL SETUP:
References (cont.)
Tools and Special Tools
Tool Kit, General Mechanic's: Automotive
(Volume 5, WP 0796, Table 2, Item 119)
Volume 3, WP 0345
Accessory Kit, MSD Electronic Equipment
Volume 3, WP 0369
(Volume 5, WP 0796, Table 2, Item 2)
Volume 3, WP 0383
Multimeter, Digital
Volume 3, WP 0410
(Volume 5, WP 0796, Table 2, Item 77)
Volume 3, WP 0435
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 636.05 or DTC 636.06
DTC 636.08
When DTC is Displayed
The engine is cranking or running and the error condition is active.
Related Information
The ECU does not detect a high-pressure fuel pump position sensor signal when engine is cranking or running.
This DTC can be caused by an open or shorted circuit in the sensor wiring.
Alarm Level
Warning.
Control Unit Response
Prolonged cranking time may be required to start the engine.
The ECU will use the crankshaft position signal input to determine high pressure fuel pump and pump position.
If a crankshaft position signal DTC accompanies 636.08, the engine cannot be started and will stall if running until
at least one of the two codes is repaired.
0055-1