Nissan Murano: Dtc/circuit Diagnosis / U0101 Can Comm Circuit
DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-Nissan Murano vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a Nissan Murano vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.
DTC DETECTION LOGIC
When ECM is not transmitting or receiving CAN communication signal of OBD (emission-related diagnosis) with TCM for 2 seconds or more.
| DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition | |
| U0101 |
LOST COMM (TCM) (Lost Communication with TCM) |
Diagnosis condition | Ignition switch ON |
| Signal (terminal) | CAN communication signal | ||
| Threshold | ECM is not transmitting or receiving CAN communication signal of OBD (emission-related diagnosis) with TCM. | ||
| Diagnosis delay time | 2 seconds or more | ||
POSSIBLE CAUSE
-
CAN communication line between TCM and ECM
-
CAN communication line open or shorted
FAIL-SAFE
| Engine operating condition in fail-safe mode | ||
|---|---|---|
| Fail safe mode | Nissan Murano Vehicle behavior | |
| CAN communication line | ECM operates active grille shutter to fully-open position. | |
PERFORM DTC CONFIRMATION PROCEDURE
-
Turn ignition switch ON and wait at least 3 seconds.
-
Check 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
Perform the trouble diagnosis for CAN communication system. Refer to Trouble Diagnosis Flow .
C053c Wheel Speed Sensor
DTC Description
DTC DETECTION LOGIC DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
C053C
Wheel speed sensor
(Wheel speed sensor generic range/performance)
Diagnosis condition
Engine running
Signal
Nissan Murano Vehicle speed signal
Threshold
Wheel sensor signal is invalid...
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...
Other information:
Nissan Murano (Z52) 2015-2024 Service Manual: P1078 Evt Control Position Sensor
DTC Description DTC DETECTION LOGICAn excessively high or low voltage from the sensor is sent to ECM. DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition P1078 EXH TIM SEN/CIRC-B1 [Exhaust valve timing (EVT) control position sensor (bank 1) circuit] Diagnosis condition Start engine and let it idle Signal (terminal) Voltage signal transmitted from EVT control position sensor to ECM Threshold An excessively high or low voltage from the sensor is sent to ECM Diagnosis delay time — P1084 EXH TIM SEN/CIRC-B2 [Exhaust valve timing (EVT) control position sensor (bank 2) circuit] Diagnosis condition Start engine and let it idle Signal (terminal) Voltage signal transmitted from EVT control position sensor to ECM Threshold An excessively high or low voltage from the sensor is sent to ECM Diagnosis delay time — POSSIBLE CAUSEDTC P1078 Harness or connectors [EVT control position sensor (bank 1) circuit is open or shorted...
Nissan Murano (Z52) 2015-2024 Service Manual: Diag on Can
System Description SYSTEM DIAGRAM Name Harness Description DDL1 Tx Rx For communications with the diagnostic tool. (CAN-H and CAN-L are used for controlling) DDL2 K-LINE For communications with the diagnostic tool. (CAN-H and CAN-L are used for controlling) Diag on CAN CAN-H CAN-L For communications with the diagnostic tool...
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Driver and passenger supplemental knee air bag
Driver’s side
The knee air bag is located in the knee bolster, on the driver’s and passenger’s side. All of the information, cautions and warnings in this manual apply and must be followed. The knee air bag is designed to inflate in higher severity frontal collisions, although it may inflate if the forces in another type of collision are similar to those of a higher severity frontal impact. It may not inflate in certain collisions.
Passenger’s side
