TM 5-3805-294-23-1
0052
Control Unit Response - Continued
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 DTC 636.02, the engine cannot be started and will stall if running
until at least one of the two codes is repaired.
TROUBLESHOOTING PROCEDURE
Table 1. DTC 636.02 - High-Pressure Fuel Pump 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
X02 Has Damage or
(Volume 5, WP 0794)
Loose Sockets.
2.
Disconnect engine wiring
harness connector X02 from
high-pressure fuel pump
position sensor. (Volume 5,
WP 0800, Figure 83)
3.
Visually inspect engine wiring
1.
If damaged or has loose
harness connector X02 for
sockets, repair connector X02
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 high-pressure fuel
2.
High-Pressure Fuel
pump position sensor.
Pump Position
Sensor Has
(Volume 3, WP 0435)
Damage or Loose
Pins.
2.
Visually inspect high-pressure
1.
If damaged or has loose pins,
fuel pump position sensor for
replace high-pressure fuel
damage and loose pins.
pump position sensor.
(Volume 5, WP 0800, Figure
(Volume 3, WP 0435) Restore
83)
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.
0052-2