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

  1. Start engine and wait for at least 5 seconds.
  2. 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:

Shift lock system
Component Function Check 1.CHECK SHIFT LOCK OPERATION (BRAKE PEDAL RELEASED) Ignition switch ON. Attempt to shift selector lever to any position other than "P" position with brake pedal released. Can the selector lever be shifted? YES >> Go to TM "Diagnosis Procedure". ...

Brake pad
BRAKE PAD : Inspection and Adjustment INSPECTION Check brake pad wear thickness from an inspection hole on cylinder body. Check using a scale if necessary. Wear thickness : Refer to BR "Front Disc Brake". ADJUSTMENT Burnish contact surfaces between disc rotor and brake pads a ...

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