Speed Sensor; Water Temperature Sensor; Electronic Governor - Kubota D1503-M Workshop Manual

03-M-E3B, 03-M-DI-E3B, 03-M-E3BG WSM

(7) Electronic Governor

Speed Sensor

1. Disconnect the speed sensor connector (2) (3P).
2. Check the state of the harness and if it is abnormal, please
replace it.
3. Turn the key switch to the ACC position.
4. Measure the voltage between the terminals of the connector (2)
(harness side).
5. When the measurements are the below table value.
The ECU is normal. The speed sensor (1) is failure, then please
replace it.
6. When the measurements are out of the below table value.
The ECU is failure, then please replace it.
Terminal 1 - Terminal 3
Voltage
Terminal 1 - Terminal 2
(1) Speed Sensor
(2) Speed Sensor Connector
(Harness Side)

Water Temperature Sensor

1. Disconnect the water temperature sensor connector (2) (2P).
2. Check the state of the harness and if it is abnormal, please
replace it.
3. Turn the key switch to the ACC position.
4. Measure the voltage between the terminals of the connector (2)
(harness side).
5. When the measurements are the below table value.
The ECU is normal. The water temperature sensor (1) is failure,
then please replace it.
6. When the measurements are out of the below table value.
The ECU is failure, then please replace it.
Voltage Terminal 1 - Terminal 2
(1) Water Temperature Sensor
(2) Water Temperature Sensor
Connector (Harness Side)
S-41
DIESEL ENGINE
12 V
5 V
(3) Terminal 3 (+)
(4) Terminal 2 (Signal)
(5) Terminal 1 (GND)
W1058552
5 V
(3) Terminal 2 (−)
(4) Terminal 1 (+)
W1059499
KiSC issued 07, 2008 A