TM 5-3805-294-23-1
0057
Control Unit Response - Continued
The ECU will use the high-pressure fuel pump position sensor input to determine piston position.
If a high-pressure fuel pump position sensor DTC accompanies DTC 637.02, the engine cannot be started and will
stall if running until at least one of the two codes is repaired.
Maximum engine power is derated up to 50 percent.
TROUBLESHOOTING PROCEDURE
Table 1. DTC 637.02 - Crankshaft Position Signal Invalid.
Test or Inspection
Corrective Action
Malfunction
1.
Verify key switch is in OFF
1.
Engine Wiring
position (TM 5-3805-294-10).
Harness Connector
X01 Has Damage or
(Volume 5, WP 0794)
Loose Sockets.
2.
Disconnect engine wiring
harness connector X01 from
crankshaft position sensor.
(Volume 5, WP 0800, Figure
82)
3.
Visually inspect engine wiring
1.
If damaged or has loose
harness connector X01 for
sockets, repair connector X01
damage and loose sockets.
(Volume 4, WP 0511) or
replace engine wiring
harness. (Volume 4,
WP 0510) Restore machine to
original condition and perform
Harness Diagnostic Mode
Test. (Volume 3, WP 0345)
2.
If not damaged and does not
have loose sockets, proceed to
Malfunction 2.
1.
Remove crankshaft position
2.
Crankshaft Position
Sensor Has
sensor. (Volume 3, WP 0405)
Damage or Loose
Pins.
2.
Visually inspect crankshaft
1.
If damaged or has loose pins,
position sensor for damage
replace crankshaft position
and loose pins. (Volume 5,
sensor. (Volume 3, WP 0405)
WP 0800, Figure 82)
Restore machine to original
condition and perform Harness
Diagnostic Mode Test.
(Volume 3, WP 0345)
If not damaged and does not
2.
have loose pins, proceed to
Malfunction 3.
0057-2