Kubota V3800-CR-TE4 Diagnosis Manual page 258

V3800-CR-TE4,V3800-CR-TIE4, DM
1. DTC Judgment
1. Place the key switch in the OFF position, and attach the
diagnosis tool to the CAN1 connector.
2. Turn the key switch to the ON position, check whether the DTC
(P2146, P2149) is output or not.
Factory
Either DTC P2146 or P2149 is output.
specification
OK Go to "4. Measure the Resistance Between ECU Terminals".
NG Go to "2. Check the "P-GND" Wiring Harness".
(a) CAN1 Connector
2. Check the "P-GND" Wiring Harness
1. Place the key switch in the OFF position, unplug the ECU wiring
harness connector from the socket, and measure the resistance
between each ECU terminal and the chassis ground (at the
wiring harness side).
Factory
1.5 Ω or lower
specification
OK Go to "3. Check the "P-GND" Wiring Harness Connector and ECU Pins".
NG 1. Check the "P-GND" wiring harness → Repair.
2. Locate the cause of open circuit, or increase its resistance value.
3. Check the "P-GND" Wiring Harness Connector and ECU Pins
1. Place the key switch in the OFF position, unplug the ECU
connector from the socket, and check the ECU pins for faulty
connection, deformation, poor contact or other defects.
Factory Must be free from faulty connection, deformation, poor
specification contact or other defects.
OK Go to "4. Measure the Resistance Between ECU Terminals".
NG Repair wiring harness connectors and ECU pins, or replace them if
defective.
4. Measure the Resistance Between ECU Terminals
1. Place the key switch in the OFF position, unplug the ECU wiring
harness connector, and measure the resistance between each
terminal at the connector side as shown on the following table.
DTC
P2146 A-49, A-73
P2149 A-1, A-25
Factory
Both system cables must have 1.5 Ω or lower.
specification
OK Go to "6. Check the Wiring Harness Connectors and ECU Pins".
NG Go to "5. Check the Wiring Harness → Repair or Replace the Faulty
Area".
1-S231
COMMON RAIL SYSTEM
9Y1200192CRS0442US0
9Y1200192CRS0787US0
9Y1200192CRS0788US0
ECU Terminals Measured
No. 1 cylinder A-74
No. 4 cylinder A-51
No. 3 cylinder A-26
No. 2 cylinder A-3
9Y1200192CRS0789US0
KiSC issued 05, 2012 A