Can1 Bus Off (Dtc U0077 / 523604-2) - Kubota 07-CR-E5 Manual

07-CR-E5,07-CR-TE5,07-CR-TIE5, DM

(72) CAN1 Bus Off (DTC U0077 / 523604-2)

Behaviour during malfunction:
• Insufficient output
• Transmitted data is invalid
Detection item:
• CAN1 +B/GND open circuit or high traffic error
DTC set preconditions:
• Battery voltage is normal
• Key switch is ON
DTC set parameter:
• CAN1 Bus off
Engine warning light:
• ON
Limp home action by engine ECU (system action):
• Output limitation: Approximately 75 % of normal condition
• EGR stop
Recovery from error:
• Key switch turn OFF
(a) EGR Valve Assembly (b) Engine ECU
1. Check the Wiring Related to the CAN of the Common Rail
System
1. Check the connector and the wiring harness being connected to
engine ECU terminal V16 and V36 for a short or an open circuit.
IMPORTANT
• Refer
PROCEDURE - (1) Basics of Checking Electrical /
Electronic Circuit Systems". (Refer to page 1-S326)
OK
NG
1-S316
(c) Engine ECU Connector 2
(Machine Side)
to "6.[3] ELECTRIC
Replace the engine ECU.
Replace the faulty areas.
COMMON RAIL SYSTEM
9Y3200007CRS0501US0
A: To Diagnosis Tool
9Y3200007CRS0502US0
SYSTEM INSPECTION
9Y3200007CRS0503US0
KiSC issued 03, 2022 A