Kubota 07-CR-E5 Manual page 240

07-CR-E5,07-CR-TE5,07-CR-TIE5, DM
2. Check the Wiring Harness / Connector
1. Remove the connector from the engine ECU side and check the
state of the continuity between terminal V24 and (3).
2. Next, check the state of the continuity between terminal V40 /
V60 and (4).
Service
Both have continuity
specification
3. Check the connector for poor connection, engagement and
contact.
Service
No poor connection, engagement or contact.
specification
OK Go to "3. Check the Relay".
NG Replace the faulty areas.
(1) Terminal +B
(2) Terminal MAHR
(3) Terminal GRLY
(4) Terminal GND
3. Check the Relay
1. After disconnecting the connector of coolant temperature
sensor and connect the dummy resistor (5) as shown in the left
figure, and turn the key switch ON.
Dummy Resistor: 15 to 25 kΩ
[Comparable to Approx. −30 to −20 °C (Approx. −22 to −5 °F)]
2. Measure the voltage between (3) and (4).
Service When relay is ON: Battery voltage value
specification When relay is OFF: Approx. 0 V
3. Check the state of the continuity between (1) and (2).
Service When relay is ON: Continuity
specification When relay is OFF: No continuity
4. Measure the resistance in the relay unit (between (3) and (4)).
Service
Coil resistance value of relay to use
specification
OK Go to "4. Engine ECU replacement check".
NG Relay fault → Replace.
(1) Terminal +B
(2) Terminal MAHR
(3) Terminal GRLY
(4) Terminal GND
(5) Dummy Resistor
(6) Connector
1-S202
COMMON RAIL SYSTEM
(a) Air Heater (Glow) Relay
A: To Main Air Heater (Glow) Relay
9Y3200007CRS0291US0
(a) Air Heater (Glow) Relay
(b) Coolant Temperature Sensor
9Y3200007CRS0292US0
KiSC issued 03, 2022 A