Nissan Murano: Dtc/circuit Diagnosis / U0122 Lost Communication (vdc)
DTC DETECTION LOGIC
| DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition | |
| U0122 |
LOST COMM (BRAKE C/U) (Lost Communication With Nissan Murano Vehicle Dynamics Control Module) |
Diagnosis condition | When the ignition switch is ON |
| Signal | CAN communication signal | ||
| Threshold | TCM is unable to receive the CAN communications signal from ABS actuator and electric unit (control unit) | ||
| Diagnosis delay time | Continuously for 2 seconds or more | ||
POSSIBLE CAUSE
-
ABS actuator and electric unit (control unit)
-
Harness or connector (CAN communication line is open or shorted)
FAIL-SAFE
Not changed from normal driving
DTC CONFIRMATION PROCEDURE
CHECK DTC PRIORITY
WhenDTC U0122 is displayed together with DTC U0300, diagnose first the DTC U0300.
Is "U0300" detected?
YES>>Perform diagnosis of DTC U0300. Refer to Diagnosis Procedure.
NO>>GO TO 2.
PREPARATION BEFORE WORK
If another "DTC CONFIRMATION PROCEDURE" occurs just before, ignition switch OFF and wait for at least 10 seconds, then perform the next test.
>>
GO TO 3.
PERFORM DTC CONFIRMATION PROCEDURE
-
Ignition switch ON and wait for at least 2 seconds.
-
Check the DTC.
Is DTC detected?
YES>>Proceed to Diagnosis Procedure.
NO>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO>>Confirmation after repair: INSPECTION END
For the diagnosis procedure, refer to Trouble Diagnosis Flow Chart.
U0102 Lost Communication (transfer)
DTC Description
DTC DETECTION LOGICWhen the ignition switch is ON, TCM is unable to receive the CAN communications signal from AWD control unit continuously for 2 seconds or more...
U0300 Can Communication Data
DTC Description
DTC DETECTION LOGICWhen the ignition switch is ON, the data length transmitted from each control unit is shorter than the specified length and the status continues for 2 seconds or more...
Other information:
Nissan Murano (Z52) 2015-2024 Service Manual: Door Motor
Diagnosis Procedure CHECK EACH DOOR MOTOR POWER SUPPLY Ignition switch ON. Check voltage between intake door motor harness connector and ground. + − Voltage (Approx.) Intake door motor Connector Terminal M153 1 Ground Battery voltage Is the inspection result normal? YES>> GO TO 2...
Nissan Murano (Z52) 2015-2024 Service Manual: C1201 Controller Failure
DTC Description DTC DETECTION LOGICMalfunction has occurred inside AWD control unit. DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition C1201 CONTROLLER FAILURE (Control unit failure) Diagnosis condition Ignition switch: ON Signal — Threshold — Diagnosis delay time — POSSIBLE CAUSEInternal malfunction of AWD control unitFAIL-SAFEFront-wheel drive or shifts to 4-wheel drive (rear-wheels still have some driving torque)...
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Fuel gauge
The gauge indicates the approximate fuel level in the tank.
The gauge may move slightly during braking, turning, acceleration, or going up or down hills.
The gauge needle returns to 0 (Empty) after the ignition switch is placed in the OFF position.
