2011 INFINITI QX56 Factory Service Manual

AUX jump cable ESP inoperative turn signal bulb keyless immobilizer

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Page 2193 of 5598

INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITEC-169
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 8.
6.CHECK ECM POWER SUPPLY CIRCU

Page 2194 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-170
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
POWER SUPPLY AND GROUND CIRCUIT
Check the following.
Loose or poor connection for each connector and harness
Harness for open or short between ECM and IPD

Page 2195 of 5598

INFINITI QX56 2011 Factory Service Manual
U0101 CAN COMM CIRCUITEC-171
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
U0101 CAN COMM CIRCUIT
DTC LogicINFOID:0000000006217764
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE

Page 2196 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-172
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
U1001 CAN COMM CIRCUIT
U1001 CAN COMM CIRCUIT
DTC LogicINFOID:0000000006217768
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCE

Page 2197 of 5598

INFINITI QX56 2011 Factory Service Manual
U0113, U1003 CAN COMM CIRCUITEC-173
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
U0113, U1003 CAN COMM CIRCUIT
DTC LogicINFOID:0000000006412037
DTC DETECTION LOGIC
NOTE:
If DTC

U0113, U1003 CAN COMM CIRCUITEC-173
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
U0113, U1003 CAN COMM CIRCUIT
DTC LogicINFOID:0000000006412037
DTC DETECTION LOGIC
NOTE:
If DTC U0113 or U1003 is displayed with DTC P
0607, first perform the trouble diagnosis for DTC P0607.
Refer to EC-378, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
TESTING CONDITION:
Before performing the following procedure, confi rm that battery voltage is 10 V or more 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 >> Proceed to EC-173, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006412038
1.CHECK VVEL CAN COMMUNICATION CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect VVEL control module harness connector.
4. Check the continuity between ECM harness c onnector and VVEL control module harness connector.
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
Harness for open or short between ECM and VVEL control module
Loose or poor connection for each connector and harness
DTC No. Trouble diagnosis name
(Trouble diagnosis content) DTC detecting condition Possible cause
U0113 CAN COMM CIRCUIT
(Lost communicat ion with VVEL
control module) When ECM is not transmitting or receiving
CAN communication signal of OBD (emis-
sion related diagnosi
s) with VVEL control
module for 2 seconds or more. Harness or connectors
(VVEL CAN communication line is
open or shorted)
ECM
VVEL control module
U1003 When ECM is not transmitting or receiving
CAN communication signal other than OBD
(emission related di
agnosis) with VVEL
control module for 2 seconds or more.
ECM VVEL control module Continuity
Connector Terminal Connector Terminal
E80 161
F56 24
Existed
166 11
Revision: 2010 May2011 QX56

Page 2198 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-174
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
U0113, U1003 CAN COMM CIRCUIT
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK INTERMITTENT INCIDENT
Refer to GI-4

Page 2199 of 5598

INFINITI QX56 2011 Factory Service Manual
U1024 CAN COMM CIRCUITEC-175
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
U1024 CAN COMM CIRCUIT
DTC LogicINFOID:0000000006217770
DTC DETECTION LOGIC
NOTE:
If DTC U1024 is displ

Page 2200 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-176
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
U1024 CAN COMM CIRCUIT
3.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair

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