Infiniti G37 Coupe. Manual — part 491
U0113, U1003 CAN COMM CIRCUIT
EC-145
< COMPONENT DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
2.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace.
3.
REPLACE VVEL CONTROL MODULE
1.
Replace VVEL control module.
2.
EC-17, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (VVEL CONTROL MOD-
ULE) : Special Repair Requirement"
>> GO TO 4.
4.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “SELF-DIAG RESULTS” mode with CONSULT-III.
3.
Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
See
.
With GST
1.
Turn ignition switch ON.
2.
Select Service $04 with GST.
3.
Perform DTC Confirmation Procedure.
See
.
Is the DTC U1003 displayed again?
YES
>> GO TO 5.
NO
>> INSPECTION END
5.
REPLACE ECM
1.
Replace ECM.
2.
EC-16, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM) : Special Repair
.
>> INSPECTION END
EC-146
< COMPONENT DIAGNOSIS >
[VQ37VHR]
U1000, U1001 CAN COMM CIRCUIT
U1000, U1001 CAN COMM CIRCUIT
Description
INFOID:0000000001733971
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a 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 Logic
INFOID:0000000001733972
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 3 seconds.
2.
Check DTC.
Is DTC detected?
YES
>>
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001733973
Go to
LAN-16, "Trouble Diagnosis Flow Chart"
.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
U1000
CAN communication
line
When ECM is not transmitting or receiving CAN com-
munication signal of OBD (emission related diagno-
sis) for 2 seconds or more.
• Harness or connectors
(CAN communication line is open or
shorted)
U1001
When ECM is not transmitting or receiving CAN com-
munication signal other than OBD (emission related
diagnosis) for 2 seconds or more.
U1010 CONTROL UNIT (CAN)
EC-147
< COMPONENT DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
U1010 CONTROL UNIT (CAN)
Description
INFOID:0000000001910713
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a 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 Logic
INFOID:0000000001733975
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON.
2.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001733976
1.
INSPECTION START
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “SELF-DIAG RESULTS” mode with CONSULT-III.
3.
Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
See
.
5.
Check DTC.
With GST
1.
Turn ignition switch ON.
2.
Select “Service $04” with GST.
3.
Perform DTC Confirmation Procedure.
See
.
4.
Check DTC.
Is the DTC U1010 displayed again?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
REPLACE ECM
1.
Replace ECM.
2.
EC-16, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM) : Special Repair
.
>> INSPECTION END
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
U1010
CAN communication bus
When detecting error during the initial diagno-
sis of CAN controller of ECM.
• ECM
EC-148
< COMPONENT DIAGNOSIS >
[VQ37VHR]
U1011 CONTROL UNIT (CAN)
U1011 CONTROL UNIT (CAN)
Description
INFOID:0000000001910711
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. ECM and
VVEL control module are connected with two communication lines (CAN H line and CAN L line) and transmit/
receive data. ECM shares information and links with the VVEL control module during operation.
DTC Logic
INFOID:0000000001736735
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 3 seconds.
2.
Check DTC.
Is DTC detected?
YES
>> Go to
NO >> INSPECTION
END
Diagnosis Procedure
INFOID:0000000001736741
1.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “SELF-DIAG RESULTS” mode with CONSULT-III.
3.
Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
See
With GST
1.
Turn ignition switch ON.
2.
Select Service $04 with GST.
3.
Perform DTC Confirmation Procedure.
See
Is the DTC U1011 displayed again?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
REPLACE ECM
1.
Replace ECM.
2.
EC-16, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM) : Special Repair
.
>> INSPECTION END
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
U1011
VVEL CAN controller
When detecting error during the ini-
tial diagnosis of VVEL CAN controller
of ECM.
• ECM
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