Kubota 07-CR-E5 Manual page 270

07-CR-E5,07-CR-TE5,07-CR-TIE5, DM
1. Measure the Engine ECU Terminal Voltage
1. Place the key switch in the OFF position, and measure the
voltage between engine ECU terminals V18 / V38 / V58 / V78
and V01 / V21 and the chassis ground.
Service
0 V
specification
OK Clear the DTC and check whether it is detected again or not.
OK Normal.
NG Replace the engine ECU.
NG Go to "2. Check the Key Switch Signal".
2. Check the Key Switch Signal
1. Place the key switch in the OFF position, attach the diagnosis
tool to the CAN1 connector, and return the key switch to the ON
position again.
2. Using the data monitor function of diagnosis tool, check the
"Key switch" data when the key switch is placed in the OFF
position.
Service
OFF
specification
OK Go to "4. Check the Engine ECU Terminal Voltage".
NG Go to "3. Check the IG-SW Signal".
(a) CAN1 Connector
3. Check the IG-SW Signal
1. Place the key switch in the OFF position, and measure the
voltage at engine ECU terminal V13 / V33.
Service
0 V
specification
OK Go to "4. Check the Engine ECU Terminal Voltage".
NG 1. Check the wiring harness and the key switch. → Replace.
2. Locate the cause of constant voltage supply to the wiring harness.
4. Check the Engine ECU Terminal Voltage
1. Keep the key switch in the OFF position, and measure the
voltage at engine ECU main relay terminals V03 and V23.
Service
10 V or higher
specification
OK Go to "5. Measure the Resistance Between Relay Terminals (for
Confirmation)".
NG 1. Check the wiring harness between relay and engine ECU and
connectors. → Replace.
2. Locate the cause of constant shorted wiring harness to the ground.
1-S232
COMMON RAIL SYSTEM
9Y3200007CRS0354US0
9Y3200007CRS0355US0
9Y3200007CRS0356US0
9Y3200007CRS0357US0
KiSC issued 03, 2022 A