Nissan Rogue (T33) 2021-Present Service Manual: Dtc/circuit Diagnosis :: U2148-87 Can Comm Err (brake Control Unit)
Intelligent Key Unit
DTC Description
DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-Nissan Ariya vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern Nissan Ariya vehicle is equipped with many electronic control unit, 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 High-line, CAN Low-line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.
DTC DETECTION LOGIC
| DTC No. |
CONSULT screen items (Trouble diagnosis content) | DTC Detection Condition | |
|---|---|---|---|
| U2148-87 |
CAN comm err (brake control unit) [CAN communication error (brake control unit)] |
Diagnosis condition | Ignition switch ON |
| Signal (terminal) | CAN communication signal | ||
| Threshold | Transmission error or reception error | ||
| Diagnosis delay time | 2 seconds or more | ||
POSSIBLE CAUSE
CAN communication system
FAIL-SAFE
—
DTC CONFIRMATION PROCEDURE
DTC CONFIRMATION
CONSULT
-
Ignition switch ON and wait for 2 seconds or more.
-
Select “Self diagnosis result” mode of “INTELLIGENT KEY”.
Is DTC detected?
YES>>Refer to DTC Diagnosis Procedure.
NO-1>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2>>Confirmation after repair: Inspection End.
DTC Diagnosis Procedure
CHECK CAN COMMUNICATION
Check CAN communication. Refer to Trouble Diagnosis Flow Chart.
Is DTC “U2148-87” displayed?
YES>>Repair or replace the malfunctioning part.
NO>>Check intermittent incident. Refer to Intermittent Incident.
Automatic Back Door Control Unit
DTC Description
DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-Nissan Ariya vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern Nissan Ariya vehicle is equipped with many electronic control unit, 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 High-line, CAN Low-line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.
DTC DETECTION LOGIC
| DTC No. |
CONSULT screen items (Trouble diagnosis content) | DTC Detection Condition | |
|---|---|---|---|
| U2148-87 |
CAN comm err (brake control unit) [CAN communication error (brake control unit)] |
Diagnosis condition | Ignition switch ON |
| Signal (terminal) | CAN communication signal | ||
| Threshold | Automatic back door control unit is unable to receive the CAN communications signal from ABS actuator and electric unit (control unit) | ||
| Diagnosis delay time | 2 seconds or less | ||
POSSIBLE CAUSE
CAN communication system
FAIL-SAFE
Inhibit automatic back door system all function
DTC CONFIRMATION PROCEDURE
DTC CONFIRMATION
CONSULT
-
Ignition switch ON and wait for 2 seconds or more.
-
Select “Self diagnosis result” mode of “AUTOMATIC BACK DOOR”.
Is DTC detected?
YES>>Refer to DTC Diagnosis Procedure.
NO-1>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2>>Confirmation after repair: Inspection End.
DTC Diagnosis Procedure
CHECK CAN COMMUNICATION
Check CAN communication. Refer to Trouble Diagnosis Flow Chart.
Is DTC “U2148-87” displayed?
YES>>Repair or replace the malfunctioning part.
NO>>Check intermittent incident. Refer to Intermittent Incident.
Other materials:
P2121 App Sensor
DTC Description
DTC DETECTION LOGIC DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P2121
00
Throttle/pedal position sen/sw D
(Throttle/Pedal Position Sensor/Switch "D" Circuit Range/Performance)
Diagnosis condition
Engine running at idle
...
Fuel Injector Offset Learning
Description
Fuel injector offset learning is an operation to allow ECM to learn
fuel injector offset data. This operation must be performed after the
following parts are replaced:
Each time injector or ECM is replaced.
(For details, refer to Work Procedure.)
Work Procedure
PRECONDITIONI ...
Nissanconnect. Basic Inspection
Diagnosis and Repair Workflow
Nissanconnect
Work Flow
OVERALL SEQUENCEDETAILED FLOWINTERVIEW FOR MALFUNCTION
It is also important to clarify the customer concerns before starting
the inspection. Interview the customer about the concerns carefully and
understand the symptoms fully.
NOTE:
...