Dtc U010E Lost Communication With Reductant Control Module
DESCRIPTION
MONITOR DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK DTC OUTPUT
CHECK HARNESS AND CONNECTOR (UREA PUMP CONTROL ECU - ECM)
CHECK UREA PUMP CONTROL ECU (BATT TERMINAL)
CHECK DCU MAIN RELAY (DCU)
CHECK UREA PUMP CONTROL ECU (UREL TERMINAL)
CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - UREA PUMP CONTROL ECU)
CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - UREA PUMP CONTROL ECU)
DTC U010E Lost Communication with Reductant Control Module |
DESCRIPTION
The ECM sends and receives data to and from the urea pump control ECU via local CAN communication.U010EDTC Detection Drive Pattern
| DTC Detection Condition
| Trouble Area
|
1.6 seconds or more after turning the engine switch on (IG).
| Communication stops between the ECM and the urea pump control ECU for 1.6 seconds or more.
| - Urea pump control ECU
- Harness or connector
- ECM
|
MONITOR DESCRIPTION
The ECM stores a DTC when a communication malfunction occurs between the ECM and urea pump control ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- Inspect the fuses of circuits related to this system before performing the following inspection procedure.
- HINT:
- Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
Connect the GTS to the DLC3.
Turn the engine switch on (IG) and turn the GTS on.
According to the display on the GTS, select "Health Check".
Check for currently output system DTCs.
- Result:
Result
| Proceed to
|
DTC U010E is output
| A
|
DTC U010E and other DTCs are output*
| B
|
- HINT:
- *: If any other DTCs are output, perform troubleshooting for those DTCs first.
| 2.CHECK HARNESS AND CONNECTOR (UREA PUMP CONTROL ECU - ECM) |
Disconnect the urea pump control ECU connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
s3-27 (CAN+) - G182-27 (CANU)
| Always
| Below 1 Ω
|
s3-26 (CAN-) - G182-35 (CAND)
| Always
| Below 1 Ω
|
s3-27 (CAN+) or G182-27 (CANU) - Body ground and other terminals
| Always
| 10 kΩ or higher
|
s3-26 (CAN-) or G182-35 (CAND) - Body ground and other terminals
| Always
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
|
| 3.CHECK UREA PUMP CONTROL ECU (BATT TERMINAL) |
Disconnect the urea pump control ECU connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection
| Switch Condition
| Specified Condition
|
s3-30 (BATT) - Body ground
| Always
| 11 to 14 V
|
Text in Illustration*a
| Front view of wire harness connector
(to Urea Pump Control ECU)
|
| 4.CHECK DCU MAIN RELAY (DCU) |
Inspect the DCU main relay (LandCruiser RM00000469101AX_01_0003.html).
| | REPLACE DCU MAIN RELAY (DCU) |
|
|
| 5.CHECK UREA PUMP CONTROL ECU (UREL TERMINAL) |
Remove the DCU relay from the engine room relay block.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection
| Condition
| Specified Condition
|
DCU relay terminal 2 - Body ground
| Engine switch on (IG)
| 11 to 14 V
|
Text in Illustration*1
| Front view of wire harness connector
(to DCU Relay)
|
*a
| Engine Room Relay Block
|
| 6.CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - UREA PUMP CONTROL ECU) |
Text in Illustration*1
| Engine Room Relay Block
| -
| -
|
*a
| Front view of wire harness connector
(to DCU Relay)
| *b
| Front view of wire harness connector
(to Urea Pump Control ECU)
|
Remove the DCU relay from the engine room relay block.
Disconnect the urea pump control ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
DCU relay terminal 5 - s3-11 (+BU1)
| Always
| Below 1 Ω
|
DCU relay terminal 5 - s3-10 (+BU2)
| Always
| Below 1 Ω
|
DCU relay terminal 5 - s3-19 (+BU3)
| Always
| Below 1 Ω
|
DCU relay terminal 5 - s3-1 (+BU4)
| Always
| Below 1 Ω
|
DCU relay terminal 5 - s3-2 (+BU5)
| Always
| Below 1 Ω
|
DCU relay terminal 1 - Body ground
| Always
| Below 1 Ω
|
DCU relay terminal 5 or s3-11 (+BU1) - Body ground and other terminals
| Always
| 10 kΩ or higher
|
DCU relay terminal 5 or s3-10 (+BU2) - Body ground and other terminals
| Always
| 10 kΩ or higher
|
DCU relay terminal 5 or s3-19 (+BU3) - Body ground and other terminals
| Always
| 10 kΩ or higher
|
DCU relay terminal 5 or s3-1 (+BU4) - Body ground and other terminals
| Always
| 10 kΩ or higher
|
DCU relay terminal 5 or s3-2 (+BU5) - Body ground and other terminals
| Always
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
|
| OK |
|
|
|
| REPAIR OR REPLACE HARNESS AND CONNECTOR (NO.1 ENGINE ROOM RELAY BLOCK - BATTERY) |
|
| 7.CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - UREA PUMP CONTROL ECU) |
Text in Illustration*1
| Engine Room Relay Block
| -
| -
|
*a
| Front view of wire harness connector
(to DCU Relay)
| *b
| Front view of wire harness connector
(to Urea Pump Control ECU)
|
Remove the DCU relay from the engine room relay block.
Disconnect the urea pump control ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
DCU relay terminal 2- s3-9 (UREL)
| Always
| Below 1 Ω
|
DCU relay terminal 2or s3-9 (UREL) - Body ground and other terminals
| Always
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
|
