Kubota V3800-CR-TE4 Diagnosis Manual page 230

V3800-CR-TE4,V3800-CR-TIE4, DM
2. Check the ECU Terminal Voltage (Part 1)
1. Change the engine operation status, and measure the voltage
between ECU terminals B-5 / B-6 and B-1 / B-2.
Factory 8 V or higher, 15 V or lower
specification (except intense cold temperature)
NOTE
• Try to change the engine speed as the generated voltage
changes accordingly.
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. Check the ECU Terminal Voltage (Part 2)".
3. Check the ECU Terminal Voltage (Part 2)
1. Change the engine operation status, and measure the voltage
between ECU terminal B-1 / B-2 and chassis ground terminal.
Factory
Always 0.5 V or lower
specification
NOTE
• Try to change the engine speed as the generated voltage
changes accordingly.
OK 1. Check the charging system, the battery itself, wiring harness and
cables. → Repair the faulty area.
2. Locate the cause of excessively high or low voltage.
NG Check the wiring harness between ECU terminal and the body ground
terminal. → Repair the defects.
1-S203
COMMON RAIL SYSTEM
9Y1200192CRS0753US0
9Y1200192CRS0754US0
KiSC issued 05, 2012 A