Nissan Sentra B18 (2020-2025) Service Manual: U2118 Can Comm Circuit
Dtc Description
DTC Description
DTC DETECTION LOGIC
|
DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
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|
U2118 |
CAN comm err (Intelligent Key) |
Diagnosis condition |
Ignition switch ON |
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Signal (terminal) |
CAN communication signal |
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Threshold |
ECM is not transmitting or receiving CAN communication signal other than OBD (emission related diagnosis) |
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Diagnosis delay time |
2 seconds or more |
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POSSIBLE CAUSE
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Harness or connectors (CAN communication line is open or shorted)
FAIL-SAFE
Not applicable
Confirmation Procedure
Confirmation Procedure
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CHECK DTC PRIORITY
If DTC U2118 is displayed with DTC P0607, first perform the confirmation procedure (trouble diagnosis) for DTC P0607.
Is DTC P0607 detected?
YES >>Perform diagnosis for P0607. Refer to DTC Description.
NO >>GO TO 2.
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PRECONDITIONING
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
>>GO TO 3.
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PERFORM DTC CONFIRMATION PROCEDURE
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Turn ignition switch ON and wait at least 3 seconds.
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Check 1st trip DTC.
Is DTC U2118 detected?
YES >>Refer to Diagnosis Procedure.
NO-1 >>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2 >>Confirmation after repair: INSPECTION END
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Diagnosis Procedure
Diagnosis Procedure
Perform the trouble diagnosis for CAN communication system. Refer to Trouble Diagnosis Flow Chart.
Other materials:
A/c Switch Assembly Signal Circuit
Diagnosis Procedure
Diagnosis Procedure
CHECK WITH SELF DIAGNOSTIC RESULT FUNCTION
CONSULT
Select “Self Diagnostic Result” mode of “HVAC”.
Check DTC.
...
Trunk Opener Request Switch
Component Function Check
Component Function Check
CHECK FUNCTION
CONSULT
Select "Request switch BD/TR" in "Data Monitor"
mode of "BCM(TRUNK)".
Select that the functi ...
P2135 Tp Sensor
Dtc Description
DTC Description
DTC DETECTION LOGIC
DTC
CONSULT screen terms
(Trouble diagnosis
content)
DTC detection
condition
...