TM 5-3805-294-23-1
0061
Control Unit Response - Continued
If a high-pressure fuel pump position signal DTC accompanies DTC 637.08, 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 637.08 - Crankshaft Position Signal Missing.
Test or Inspection
Corrective Action
Malfunction
1.
Turn key switch to ON position,
1.
Check For Open or
but DO NOT START ENGINE
Shorted Sensor
(TM 5-3805-294-10). (Volume
Circuit.
5, WP 0794)
2.
Perform Harness Diagnostic
Mode Test. (Volume 3,
WP 0345) Note if DTC 637.05
or 637.06 is an active DTC.
3.
Turn key switch to OFF
1.
If DTC 637.05 or DTC 637.06
position (TM 5-3805-294-10).
is active, discontinue test for
DTC 637.08 and perform test
(Volume 5, WP 0794)
for DTC 637.05 (WP 0058) or
DTC 637.06. (WP 0059)
2.
If DTC 637.05 and 637.06 are
not active DTCs, proceed to
Malfunction 2.
1.
Disconnect engine wiring
2.
Crankshaft Position
harness connector X01 from
Sensor Loose.
crankshaft position sensor.
(Volume 5, WP 0800, Figure
82)
2.
Verify crankshaft position
1.
If properly torqued, proceed to
sensor is properly torqued.
Malfunction 3.
(Volume 3, WP 0405)
If not properly torqued, torque
2.
sensor to proper torque.
(Volume 3, WP 0405) Restore
machine to original condition
and perform Harness
Diagnostic Mode Test.
(Volume 3, WP 0345)
0061-2