Nissan Qashqai J11. Manual — part 208
ECH-130
< DTC/CIRCUIT DIAGNOSIS >
[HRA2DDT]
U0299 LOST COMMUNICATION (DC/DC CONVERTER)
U0299 LOST COMMUNICATION (DC/DC CONVERTER)
DTC Logic
INFOID:0000000010787426
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If the other DTC Confirmation Procedure is performed right before this procedure, the ignition switch must be
turned OFF and wait for 12 minutes or more to start this procedure.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE-1
1.
Turn ignition switch ON and wait at least 10 seconds.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
ECH-130, "Diagnosis Procedure"
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE-2
1.
Start the engine and let it idle for at least 5 minutes.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
ECH-130, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010787427
1.
CHECK ENGINE COMMUNICATION LINE
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect DC/DC converter harness connector and alternator harness connector.
4.
Check the continuity between ECM harness connector and DC/DC converter harness connector.
5.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK DC/DC CONVERTER BATTERY POWER SUPPLY CIRCUIT
1.
Check the voltage between DC/DC converter harness connector and ground.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
U0299
Lost communication (LIN)
• ECM receives an abnormality signal
sent from DC/DC converter.
• ECM is not receiving LIN communica-
tion signal sent from DC/DC converter.
• DC/DC converter
• Harness and connectors
(LIN communication line)
+
−
Continuity
ECM
DC/DC converter
Connector
Terminal
Connector
Terminal
F18
123
M22
7
Existed
U0299 LOST COMMUNICATION (DC/DC CONVERTER)
ECH-131
< DTC/CIRCUIT DIAGNOSIS >
[HRA2DDT]
C
D
E
F
G
H
I
J
K
L
M
A
ECH
N
P
O
2.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK DC/DC CONVERTER IGNITION POWER SUPPLY CIRCUIT
1.
Turn ignition switch ON.
2.
Check the voltage between DC/DC converter harness connector and ground.
3.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK DC/DC CONVERTER GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check the continuity between DC/DC converter harness connector and ground.
3.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK INTERMITTENT INCIDENT
Perform intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace DC/DC converter. Refer to
ECH-314, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
+
−
Voltage
DC/DC converter
Connector
Terminal
M23
1
Ground
Battery voltage
3
+
−
Voltage
DC/DC converter
Connector
Terminal
M22
10
Ground
Battery voltage
+
−
Continuity
DC/DC converter
Connector
Terminal
M23
2
Ground
Existed
ECH-132
< DTC/CIRCUIT DIAGNOSIS >
[HRA2DDT]
U0315 CAN COMMUNICATION [ABS ACTUATOR AND ELECTRIC UNIT (CON-
TROL UNIT)]
U0315 CAN COMMUNICATION [ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT)]
DTC Logic
INFOID:0000000010500809
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DIAGNOSIS PROCEDURE
NOTE:
DTC U0315 can not duplicate.
>> Proceed to
ECH-132, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000010500810
1.
CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Check DTC with ABS actuator and electric unit (control unit). Refer to
Is DTC detected?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Perform trouble shooting relevant to DTC indicated.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
U0315
VEHICLE SPEED
(Software incompatibility with anti-lock
brake system control module)
ECM receives invalid signal of vehicle
speed sent from ABS actuator and elec-
tric unit (control unit).
ABS actuator and electric unit
(control unit)
U0415 CAN COMMUNICATION
ECH-133
< DTC/CIRCUIT DIAGNOSIS >
[HRA2DDT]
C
D
E
F
G
H
I
J
K
L
M
A
ECH
N
P
O
U0415 CAN COMMUNICATION
DTC Logic
INFOID:0000000010500811
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DIAGNOSIS PROCEDURE
NOTE:
DTC U0415 can not duplicate.
>> Proceed to
ECH-133, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000010500812
1.
CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Check DTC with ABS actuator and electric unit (control unit). Refer to
.
Is DTC detected?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Perform trouble shooting relevant to DTC indicated.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
U0415
ABS CONTROL MODULE
(Invalid data received from
anti-lock brake system control
module)
ECM receives invalid data sent from ABS actuator
and electric unit (control unit).
ABS actuator and electric unit
(control unit)
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