Nissan Quest E52. Manual - part 304
DAS-58
< DTC/CIRCUIT DIAGNOSIS >
[BSW]
U0121 VDC CAN 2
U0121 VDC CAN 2
DTC Logic
INFOID:0000000009940731
DTC DETECTION LOGIC
NOTE:
If DTC “U0121” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine.
2.
Turn the BSW system ON.
3.
Perform “All DTC Reading” with CONSULT.
4.
Check if the “U0121” is detected as the current malfunction in “Self Diagnostic Result” of “BSW”.
Is “U0121” detected as the current malfunction?
YES
>> Refer to
.
NO
>> Refer to
GI-42, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000009940732
1.
CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected other than “U0121” in “Self Diagnostic Result” of “BSW”.
Is “U1000” detected?
YES
>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.
DAS-53, "BSW CONTROL MODULE : DTC Logic"
.
NO
>> GO TO 2.
2.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS RESULTS
Check if any DTC is detected in “Self Diagnostic Result” of “ABS”.
Is any DTC detected?
YES
>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
.
NO
>> Replace the BSW control module. Refer to
DAS-84, "Removal and Installation"
.
DTC
Trouble diagnosis name
DTC detecting condition
Possible causes
U0121
VDC CAN CIR2
If BSW control module detects an error signal
that is received from ABS actuator and electric
unit (control unit) via CAN communication
ABS actuator and electric unit (control
unit)