Idle Failure; Engine Fault; Control System - Kubota V3800-CR-TE4 Diagnosis Manual

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

(4) Idle Failure

Possible causes:
1. Fuel feed pump operation fault
*Refer to the previous "List of malfunction causes by symptom" for the subsequent details.

2. Engine fault

• Low compression pressure
• Engine internal fault
• Valve timing fault

3. Control system

• Damage to the pulsar gear of the crankshaft position sensor
• Air gap of the crankshaft position sensor is large
• SCV operation fault
4. Fuel system
• Supply pump learning has not been performed
• Fuel quality
• Fuel filter clogging
• Fuel pressure limiter fault
• Fuel line clogging, leak
5. CRS (including the wiring harness)
• Output system (supply pump, injector and common rail)
• Input system (sensors and switches)
• ECU
6. Others
• Large amount of drag (including the brakes, etc.)
1. Check the Fuel Feed Pump Operation
1. Turn the key switch ON and check that the fuel feed pump is
operating.
Factory
Operates when the key switch is turned ON.
specification
OK Go to "2. Check the DTC".
NG Check in accordance with "6.[2] FUEL SYSTEM INSPECTION
PROCEDURE - 5. Check the Fuel Feed Pump". (Refer to page 1-S291)
(1) Fuel Feed Pump
1-S33
COMMON RAIL SYSTEM
9Y1200192CRS0864US0
[A] M60 Series
[B] M-GX Series
9Y1200192CRS0872US0
KiSC issued 05, 2012 A