Kubota V3800-CR-TE4 Diagnosis Manual page 203

V3800-CR-TE4,V3800-CR-TIE4, DM
2. Measure the ECU Terminal Voltage
1. Move the key switch from the OFF to the ON position, and
measure the voltage between ECU terminals A-57 and A-61.
2. Next, start the engine, change the depressed amount of the
accelerator pedal, and check the same items again.
Factory specification
Engine state
Key switch ON
After engine start-up
OK Check the harness connectors and ECU pins.
OK Faulty ECU → Replace.
NG Repair or replace the wiring harness, or replace the ECU.
NG Go to "3. Measure the Voltage Between Boost Pressure Sensor
Terminals".
3. Measure the Voltage Between Boost Pressure Sensor
Terminals
1. Place the key switch in the ON position, and measure the
voltage between terminals (2) and (3) of the boost 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.
Factory specification
Engine state
Key switch ON
After engine start-up
OK Check the wiring harness (between ECU terminal A-61 and sensor
terminal (2)). → Repair the faulty area.
NG Go to "4. Measure the Voltage Between Boost Pressure Sensor
Terminals".
(1) Terminal A-VCC2
(2) Terminal PIM
(3) Terminal A-GND4
1-S176
COMMON RAIL SYSTEM
Output voltage
Approx. 1.0 V
1.0 to 2.2 V
9Y1200192CRS0713US0
Output voltage
Approx. 1.0 V
1.0 to 2.2 V
(a) Terminal Layout
9Y1200192CRS0714US0
KiSC issued 05, 2012 A