Nissan Versa Sedan Service ManualTransmission & driveline » Transaxle & transmission (TM)
U0073 Communication bus a off
Nissan Versa
Sedan Service Manual
U0073 Communication bus a off
DTC Logic
| DTC | Trouble diagnosis name | DTC detecting condition | Possible causes |
| U0073 |
Control Module Communication Bus "A" Off |
When the ignition switch is ON, TCM detects a bus-off error continuously for 2 seconds or more. | Harness or connector (CAN communication line is open or shorted) |
DTC CONFIRMATION PROCEDURE
1.PREPARATION BEFORE WORK
If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn the ignition switch OFF and wait for at least 10 seconds, then perform the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
- Start engine and wait for at least 5 seconds.
- Check the DTC.
Is "U0073" detected?
YES >> Go to TM, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
For the diagnosis procedure, refer to LAN, "Trouble Diagnosis Flow Chart".
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U0073 Communication bus a off
U0100 Lost communication (ECM A)
U0140 Lost communication (BCM)
U0155 Lost communication (IPC)
U0300 Can communication data
U1000 Can comm circuit
U1117 Lost communication (ABS)
P062F EEPROM
P0705 Transmission range switch A
P0706 Transmission range sensor A
P0711 Transmission fluid temperature sensor A
P0712 Transmission fluid temperature sensor A
P0713 Transmission fluid temperature sensor A
P0717 Input speed sensor A
P0720 Output speed sensor
P072C Stuck in 1GR
P072D Stuck in 2GR
P072E Stuck in 3GR
P072F Stuck in 4GR
P0731 1GR Incorrect ratio
P0732 2GR Incorrect ratio
P0733 3GR Incorrect ratio
P0734 4GR Incorrect ratio
P073E Unable to engage r range
P073F Unable to engage 1GR
P0740 Torque converter
P0743 Torque converter
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P074A Unable to engage 2GR
P074B Unable to engage 3GR
P074C Unable to engage 4GR
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P0962 Pressure control solenoid A
P0963 Pressure control solenoid A
P0973 Shift solenoid A
P0974 Shift solenoid A
P0976 Shift solenoid B
P0977 Shift solenoid B
P0979 Shift solenoid C
P0980 Shift solenoid C
P0982 Shift solenoid D
P0983 Shift solenoid D
P2760 Torque converter
Main power supply and ground circuit
Overdrive control switch
O/D OFF indicator lamp
Shift position indicator circuit
Shift lock system
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A/T Shift selector
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Key interlock cable
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Differential side oil seal
Fluid cooler tube
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TCM
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Additional service when replacing TCM
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U0073 Communication bus A off
U0100 Lost communication (ECM A)
U0140 Lost communication (BCM)
U0141 Lost communication (BCM A)
U0155 Lost communication (IPC)
U0300 Can communication data
U1000 Can COMM circuit
U1117 Lost communication (ABS)
P062F EEPROM
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P0962 Pressure control solenoid A
P0963 Pressure control solenoid A
P0965 Pressure control solenoid B
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P099C Shift solenoid G
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Shift position indicator circuit
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Output speed sensor
Differential side oil seal
Water hose
Fluid cooler hose
PLUG
Transmission assembly
Service data and specifications (SDS)
Nissan Versa Sedan Service Manual / Transmission & driveline / Transaxle & transmission (TM) / U0073 Communication bus a off
Nissan Versa Sedan Service Manual
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