Kubota 07-CR-E5 - Page 215

COMMON RAIL SYSTEM
07-CR-E5,07-CR-TE5,07-CR-TIE5, DM
1-S177
2. Measure the Engine ECU Terminal Voltage
1. Move the key switch from the OFF to the ON position, and
measure the voltage between engine ECU terminals E68 and
E78 and between terminals E49 and E78.
2. Next, start the engine, change the depressed amount of the
accelerator pedal, and check the same items again.
9Y3200007CRS0236US0
3. Measure the Voltage Between Rail Pressure Sensor
Terminals - 1
1. Place the key switch in the ON position, and measure the
voltage between terminals (2) and (3) of the rail pressure sensor
at the wiring harness side.
2. Next, start the engine, change the depressed amount of the
accelerator pedal, and check the same items again.
9Y3200007CRS0237US0
Service
specification
Depends on the rotation speed, load (After warm-up)
1. When stopped: Approx. 1.0 V
2. When idling: 1.65 to 1.80 V
3. During no-load maximum speed: 2.50 to 2.85 V
4. During acceleration: 2.5 to 3.3 V
OK Check the harness connectors and engine ECU pins.
OK Faulty engine ECU → Replace.
NG Replace the wiring harness, or replace the engine ECU.
NG Go to "3. Measure the voltage between rail pressure sensor terminals -
1".
Service
specification
Depends on the rotation speed, load (After warm-up)
1. When stopped: Approx. 1.0 V
2. When idling: 1.65 to 1.80 V
3. During no-load maximum speed: 2.50 to 2.85 V
4. During acceleration: 2.5 to 3.3 V
OK Check the wiring harness (between engine ECU terminals E49 / E68 and
sensor terminal (2)). → Replace the faulty area.
NG Go to "4. Measure the voltage between rail pressure sensor terminals -
2".
(1) Terminal A-VCC1
(2) Terminal PFUEL
(3) Terminal PFUEL RTN
(a) Pin Assignment
KiSC issued 03, 2022 A