Nissan Versa (N17): U0073 Communication bus a off

Nissan Versa 2nd generation (N17) Service Manual / Transmission & driveline / Transaxle & transmission (TM) / 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".

Line pressure test

Work Procedure INSPECTION Inspect the amount of engine oil. Replenish the engine oil if necessary. Refer to LU, "Inspection". Drive for about 10 minutes to warm up the vehicle so ...

U0100 Lost communication (ECM A)

DTC Logic DTC DETECTION LOGIC DTC Trouble diagnosis name DTC detection condition Possible causes U0100 Lost Communication With ECM/PCM "A" When the ignition switch ...

Other materials:

Drive belt
1. Water pump pulley 2. Generator pulley 3. Manual tensioner pulley 4. Air conditioner compressor pulley 5. Crankshaft pulley WARNING Be sure the ignition switch is placed in the OFF or LOCK position before servicing drive belt. The engine could rotate unexpectedly. 1. Visually inspect t ...

Output speed sensor
Exploded View 1. Transaxle assembly 2. Output speed sensor 3. O-ring Front Genuine NISSAN CVT Fluid NS-3 Removal and Installation REMOVAL Disconnect the harness connector from output speed sensor. NOTE: Lift up the vehicle and perform the work from rear of the transaxle asse ...

Nissan Versa (N17): U0073 Communication bus a off

Line pressure test

U0100 Lost communication (ECM A)

Other materials:

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