Check The Fuel System; Check The Ecu Power Supply And Grounding; Check The Crankshaft Position Sensor - Kubota V3800-CR-TE4 Diagnosis Manual

V3800-CR-TE4,V3800-CR-TIE4, DM

5. Check the Fuel System

1. Check in accordance with "6.[2] FUEL SYSTEM INSPECTION
PROCEDURE". (Refer to page 1-S287)
OK Go to "6. Check the ECU Power Supply and Grounding".
NG Repair in accordance with "6.[2] FUEL SYSTEM INSPECTION
PROCEDURE". (Refer to page 1-S287)
(1) Fuel Filter
(2) Supply Pump
(3) Water Separator
(4) Fuel Feed Pump

6. Check the ECU Power Supply and Grounding

1. Turn the key switch ON and measure the voltage between the
ECU +BP terminals (B-5 / B-6) and ground (body / battery
terminal) and ECU S-GND terminal (B-1 / B-2) and ground
(body / battery terminal).
Factory +BP terminal -ground: 10 V or higher
specification S-GND terminal -ground: 0.5 V or lower
OK Go to "7. Check the Crankshaft Position Sensor and Camshaft Position
Sensor Signal".
NG Diagnose by referring to "6.[3]. ELECTRIC SYSTEM INSPECTION
PROCEDURE - (3) Checking The Power And Ground System (Main
Relay ECU Circuit)". (Refer to page 1-S297)
7. Check the Crankshaft Position Sensor and Camshaft
Position Sensor Signals
1. Set the key switch to START position and crank the engine.
Check the "Engine speed active flag" and "Cam speed active
flag" using the diagnosis tool data monitor function.
Factory
Both sides ON and constant.
specification
OK Normal.
NG Go to "8. Supply Pump Difference Learning and Checking the Monitor".
Both flags Cause of the engine starting failure has been determined.
are Determine the malfunction area by referring to sections in
unsatisfact P0335, P0336 (Refer to page 1-S178) and P0340, P0341
ory. (Refer to page 1-S183) in "5.[2] DIAGNOSIS BY DTC".
Only one Care should be taken as this does not cause engine starting
side of the failure. Since the sensor signal is abnormal, determine the
flag is malfunction area by referring to sections in P0335, P0336
unsatisfact (Refer to page 1-S178) and P0340, P0341 (Refer to page
ory. 1-S183) in "5.[2] DIAGNOSIS BY DTC" as was the case in the
above.
(a) CAN1 Connector
1-S26
COMMON RAIL SYSTEM
[A] M60 Series
[B] M-GX Series
9Y1200192CRS0881US0
9Y1200192CRS0882US0
9Y1200192CRS0883US0
KiSC issued 05, 2012 A