Nissan Murano: Dtc/circuit Diagnosis / U1040 Eng Comm Circuit
DTC DETECTION LOGIC
When ECM unable to transmit engine communication signal.
| DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition | |
| U1040 | Engine communication line | Diagnosis condition | Ignition switch ON |
| Signal (terminal) | Engine communication signal | ||
| Threshold | ECM unable to transmit engine communication signal | ||
| Diagnosis delay time | — | ||
POSSIBLE CAUSE
-
Harness and connectors (Engine communication line is open or shorted.)
-
ECM
FAIL-SAFE
| Engine operating condition in fail-safe mode | ||
|---|---|---|
| Fail safe mode | Nissan Murano Vehicle behavior | |
| Engine communication line | ECM operates active grille shutter to fully-open position. | |
PRECONDITIONING
If another DTC Confirmation Procedure is conducted just before this procedure, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
>>
GO TO 2.
PERFORM DTC CONFIRMATION PROCEDURE
-
Turn ignition switch ON and wait at least 10 seconds.
-
Check 1st trip DTC.
Is 1st trip DTC detected?
YES>>Proceed to Diagnosis Procedure.
NO>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO>>Confirmation after repair: INSPECTION END
CHECK ACTIVE GRILLE SHUTTER SIGNAL CIRCUIT
-
Turn ignition switch OFF.
-
Disconnect ECM harness connector.
-
Disconnect active grille shutter harness connector.
-
Check the continuity between ECM harness connector and active grille shutter harness connector.
+ − Continuity ECM Active grille shutter Connector Terminal Connector Terminal F79 99 E238 3 Existed -
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES>>INSPECTION END
NO>>Repair or replace error-detected parts.
U0284 Active Grille Shutter
DTC Description
DTC DETECTION LOGICWhen ECM cannot receive the engine communication signal from active grille shutter. DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
U0284
LOST COMM (A/GRLL SHTTR MDL A)
(Lost communication with active grille air shutter module A)
Diagnosis condition
Ignition switch ON
Signal (terminal)
Engine communication signal
Threshold
ECM cannot receive the engine communication signal from active grille shutter
Diagnosis delay time
—
POSSIBLE CAUSE
Harness and connectors (Engine communication line is open or circuit shorted...
U1044 Eng Comm Circuit
DTC Description
DTC DETECTION LOGICA signal voltage of LIN communication between ECM and generator is excessively low or excessively high. DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
U1044
ENG COMM CIRCUIT
(Engine communication circuit)
Diagnosis condition
Ignition switch ON
Signal (terminal)
Signal voltage of LIN communication
Threshold
Signal voltage between ECM and generator is excessively low or excessively high
Diagnosis delay time
—
POSSIBLE CAUSE
Harness or connectors
(LIN communication circuit is open or shorted...
Other information:
Nissan Murano (Z52) 2015-2024 Service Manual: Rear Washer Nozzle
Removal and Installation REMOVALRemove the rear spoiler. Refer to Removal and Installation. Disconect the rear washer tube from the rear washer nozzle. Remove the rear washer nozzle bolt and remove the rear washer nozzle.INSTALLATIONInstallation is in the reverse order of removal...
Nissan Murano (Z52) 2015-2024 Service Manual: Ldw
System Description SYSTEM DIAGRAMADAS CONTROL UNIT INPUT/OUTPUT SIGNAL ITEMInput Signal Item Transmit unit Signal name Description ABS actuator and electric unit (control unit) CAN communication Nissan Murano Vehicle speed signal (ABS) Receives wheel speeds of four wheels BCM CAN communication Turn indicator signal Receives an operational state of the turn signal lamp and the hazard lamp Combination meter CAN communication System selection signal Receives a selection state of each item in “Driver Assistance” selected with the Nissan Murano vehicle information display Lane camera unit ITS communication Detected lane condition signal Receives detection results of lane marker Output Signal Item Reception unit Signal name Description Combination meter CAN communication Lane departure warning lamp signal Transmits a lane departure warning lamp signal to turn ON the lane departure warning lamp Lane camera unit ITS communication Nissan Murano Vehicle speed signal Transmits a vehicle speed calculated by the ADAS control unit Turn indicator signal Transmits a turn indicator signal received from BCM Warning system buzzer Warning buzzer signal Activates warning system buzzer...
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Unfastening the seat belts. Checking seat belt operation
Unfastening the seat belts
To unfasten the seat belt, press the button
on the buckle 
. The seat belt
automatically
retracts.
