INFINITI QX56 2011 Factory Service Manual
Manufacturer: INFINITI, Model Year: 2011, Model line: QX56, Model: INFINITI QX56 2011Pages: 5598, PDF Size: 94.53 MB
Page 1351 of 5598
![INFINITI QX56 2011 Factory Service Manual
DAS-386
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
U1520 4WD CAN 3
U1520 4WD CAN 3
DTC LogicINFOID:0000000006228220
DTC DETECTION LOGIC
NOTE:
If DTC “U1520” is detected along with DTC “U1000”, firs](/img/42/57033/w960_57033-1350.png "INFINITI QX56 2011 Factory Service Manual
DAS-386
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
U1520 4WD CAN 3
U1520 4WD CAN 3
DTC LogicINFOID:0000000006228220
DTC DETECTION LOGIC
NOTE:
If DTC “U1520” is detected along with DTC “U1000”, firs")
DAS-386
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
U1520 4WD CAN 3
U1520 4WD CAN 3
DTC LogicINFOID:0000000006228220
DTC DETECTION LOGIC
NOTE:
If DTC “U1520” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to
CCS-145,
"ADAS CONTROL UNIT : DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Turn the LDP system ON.
3. Perform “All DTC Reading” with CONSULT-III.
4. Check if the “U1520” is detected as the current ma lfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U1520” detected as the current malfunction?
YES >> Refer to DAS-386, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006228221
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected ot her than “U1520” in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U1000” detected?
YES >> Perform the CAN communication system inspecti on. Repair or replace the malfunctioning parts.
Refer to DAS-374, "
ADAS CONTROL UNIT : DTC Logic".
NO >> GO TO 2.
2.CHECK TRANSFER CONTROL UNI T SELF-DIAGNOSIS RESULTS
Check if any DTC is detected in “Self Diagnostic Result” of “ALL MODE AWD/4WD”.
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
DLN-29, "
DTC Index".
NO >> Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
DTC
(On board dis-
play) Trouble diagnosis name DTC detecting condition Possible causes
U1520 (176) 4WD CAN CIRC 3 ADAS control unit detects an error signal that is
received from transfer control unit via CAN
communication
Transfer control unit
Revision: 2010 May2011 QX56
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DAS
POWER SUPPLY AND GROUND CIRCUITDAS-387
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
POWER SUPPLY AND GROUND CIRCUIT
ADAS CONTROL UNIT
ADAS CONTROL UNIT : Diagnosis Procedur](/img/42/57033/w960_57033-1351.png "INFINITI QX56 2011 Factory Service Manual
DAS
POWER SUPPLY AND GROUND CIRCUITDAS-387
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
POWER SUPPLY AND GROUND CIRCUIT
ADAS CONTROL UNIT
ADAS CONTROL UNIT : Diagnosis Procedur")
DAS
POWER SUPPLY AND GROUND CIRCUITDAS-387
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
POWER SUPPLY AND GROUND CIRCUIT
ADAS CONTROL UNIT
ADAS CONTROL UNIT : Diagnosis ProcedureINFOID:0000000006223823
1.CHECK ADAS CONTROL UNIT POWER SUPPLY CIRCUIT
Check voltage between ADAS contro l unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the ADAS control unit power supply circuit.
2.CHECK ADAS CONTROL UNIT GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the ADAS control unit connector.
3. Check for continuity between ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair the ADAS control unit ground circuit.
LANE CAMERA UNIT
LANE CAMERA UNIT : Diagnosis ProcedureINFOID:0000000006223824
1.CHECK LANE CAMERA UNI T POWER SUPPLY CIRCUIT
Check voltage between lane camera unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the lane camera unit power supply circuit.
2.CHECK LANE CAMERA UNIT GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the lane camera unit connector.
Te r m i n a l Condition
Vo l ta g e
(Approx.)
(+) (–)
ADAS control unit
GroundIgnition
switch
Connector Terminal
B61 16 OFF 0 V
ON Battery volt-
age
ADAS control unit
GroundContinuity
Connector Terminal
B61 6 Existed
Te r m i n a l Condition
Vo l ta g e
(Approx.)
(+) (–)
Lane camera unit
GroundIgnition
switch
Connector Terminal
R8 7 OFF 0 V
ON Battery volt-
age
Revision: 2010 May2011 QX56
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DAS-388
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
POWER SUPPLY AND GROUND CIRCUIT
3. Check for continuity between lane camera unit harness connector and ground.
Is the inspection result normal?
YES >> IN](/img/42/57033/w960_57033-1352.png "INFINITI QX56 2011 Factory Service Manual
DAS-388
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
POWER SUPPLY AND GROUND CIRCUIT
3. Check for continuity between lane camera unit harness connector and ground.
Is the inspection result normal?
YES >> IN")
DAS-388
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
POWER SUPPLY AND GROUND CIRCUIT
3. Check for continuity between lane camera unit harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair the lane camera unit ground circuit.
Lane camera unit
GroundContinuity
Connector Terminal
R8 1
Existed
5
Revision: 2010 May2011 QX56
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DAS
WARNING SYSTEMS SWITCH CIRCUITDAS-389
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
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G H
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K L
M B
N P A
WARNING SYSTEMS SWITCH CIRCUIT
Component Function CheckINFOID:0000000006223825
1.CHECK WA](/img/42/57033/w960_57033-1353.png "INFINITI QX56 2011 Factory Service Manual
DAS
WARNING SYSTEMS SWITCH CIRCUITDAS-389
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
WARNING SYSTEMS SWITCH CIRCUIT
Component Function CheckINFOID:0000000006223825
1.CHECK WA")
DAS
WARNING SYSTEMS SWITCH CIRCUITDAS-389
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
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M B
N P A
WARNING SYSTEMS SWITCH CIRCUIT
Component Function CheckINFOID:0000000006223825
1.CHECK WARNING SYSTEMS SWITCH INPUT SIGNAL
1. Turn the ignition switch ON.
2. Select the DATA MONITOR item “WARN SYS SW” of “ICC/ADAS” with CONSULT-III.
3. With operating the warning systems switch, check the monitor status.
Is the inspection result normal?
YES >> Warning systems switch circuit is normal.
NO >> Refer to DAS-389, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006223826
1.CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT
1. Turn the ignition switch ON.
2. Check voltage between ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> GO TO 2.
2.CHECK WARNING SYSTEMS SWITCH
1. Turn ignition switch OFF.
2. Remove warning systems switch.
3. Check warning systems switch. Refer to DAS-390, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace the warning systems switch. Refer to DAS-404, "
Removal and Installation".
3.CHECK WARNING SYSTEMS SWITCH GROUND CIRCUIT
Check continuity between twin switch harness connector terminal and the ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair harness or connector.
4.CHECK WARNING SYSTEM S SWITCH SIGNAL INPUT CIRCUIT FOR OPEN
1. Disconnect the ADAS control unit connector.
Monitor item Condition Monitor status
WARN SYS
SW Warning systems switch is pressed On
Warning systems switch is not pressed OFF
Te r m i n a l s
Condition
Vo l ta g e
(Approx.)
(+) (
−)
ADAS control unit
GroundWarning
systems switch
Connector Terminal
B61 1 Pressed 0 V
Released 12 V
Twin switch GroundContinuity
Connector Terminal
M127 3 Existed
Revision: 2010 May2011 QX56
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DAS-390
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
WARNING SYSTEMS SWITCH CIRCUIT
2. Check continuity between the ADAS control unit harness connector and twin switch harness connector.
Is the inspection re](/img/42/57033/w960_57033-1354.png "INFINITI QX56 2011 Factory Service Manual
DAS-390
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
WARNING SYSTEMS SWITCH CIRCUIT
2. Check continuity between the ADAS control unit harness connector and twin switch harness connector.
Is the inspection re")
DAS-390
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
WARNING SYSTEMS SWITCH CIRCUIT
2. Check continuity between the ADAS control unit harness connector and twin switch harness connector.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair the harnesses or connectors.
5.CHECK WARNING SYSTEMS SWITCH SI
GNAL INPUT CIRCUIT FOR SHORT
Check continuity between the ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> Repair the harnesses or connectors.
Component InspectionINFOID:0000000006223827
1.CHECK WARNING SYSTEMS SWITCH
Check continuity of warning systems switch.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace warning systems switch.
ADAS control unit Twin switch Continuity
Connector Terminal Connector Terminal
B61 1 M127 2 Existed
ADAS control unit GroundContinuity
Connector Terminal
B61 1 Not existed
Terminal Condition Continuity
23 When warning systems switch is pressed Existed
When warning systems switch is released Not existed
Revision: 2010 May2011 QX56
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DAS
WARNING SYSTEMS ON INDICATOR CIRCUITDAS-391
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
WARNING SYSTEMS ON INDICATOR CIRCUIT
Component Function CheckINFOID:000000000622382](/img/42/57033/w960_57033-1355.png "INFINITI QX56 2011 Factory Service Manual
DAS
WARNING SYSTEMS ON INDICATOR CIRCUITDAS-391
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
WARNING SYSTEMS ON INDICATOR CIRCUIT
Component Function CheckINFOID:000000000622382")
DAS
WARNING SYSTEMS ON INDICATOR CIRCUITDAS-391
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
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K L
M B
N P A
WARNING SYSTEMS ON INDICATOR CIRCUIT
Component Function CheckINFOID:0000000006223828
1.CHECK WARNING SYSTEMS ON INDICATOR
1. Turn the ignition switch ON.
2. Select the active test item “WARNING SY STEM IND” of “ICC/ADAS” with CONSULT-III.
3. With operating the test item, check the operation.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Refer to DAS-391, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006223829
1.CHECK WARNING ON INDICATOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect twin switch connector.
3. Turn ignition switch ON.
4. Check voltage between twin switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the warning systems ON indicator power supply circuit.
2.CHECK WARNING SYSTEMS ON INDICATOR SIGNAL FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect the ADAS control unit harness connector.
3. Check continuity between the ADAS control uni t harness connector and twin switch harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the harnesses or connectors.
3.CHECK WARNING SYSTEMS ON INDI CATOR SIGNAL CIRCUIT FOR SHORT
Check continuity between the ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4. On : Warning systems ON indicator illuminates
Off : Warning systems ON in
dicator is turned OFF
Te r m i n a l s
Vo l ta g e
(Approx.)
(+) (
−)
Twin switch Ground
Connector Terminal
M127 8 Battery voltage
ADAS control unit Twin switch Continuity
Connector Terminal Connector Terminal
B61 4 M127 9 Existed
ADAS control unit
GroundContinuity
Connector Terminal
B61 4 Not existed
Revision: 2010 May2011 QX56
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DAS-392
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
WARNING SYSTEMS ON
INDICATOR CIRCUIT
NO >> Repair the harnesses or connectors.
4.CHECK WARNING SYSTEMS ON INDICATOR
Check the warning systems ON indicato](/img/42/57033/w960_57033-1356.png "INFINITI QX56 2011 Factory Service Manual
DAS-392
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
WARNING SYSTEMS ON
INDICATOR CIRCUIT
NO >> Repair the harnesses or connectors.
4.CHECK WARNING SYSTEMS ON INDICATOR
Check the warning systems ON indicato")
DAS-392
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
WARNING SYSTEMS ON
INDICATOR CIRCUIT
NO >> Repair the harnesses or connectors.
4.CHECK WARNING SYSTEMS ON INDICATOR
Check the warning systems ON indicator. Refer to DAS-392, "
Component Inspection".
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> Replace warning systems switch. DAS-404, "
Removal and Installation".
Component InspectionINFOID:0000000006223830
1.CHECK WARNING SYSTEMS ON INDICATOR
Apply battery voltage to warning systems switch termi nals 8 and 9, and then check if the warning systems ON
indicator illuminates.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace the warning systems switch. Refer to DAS-404, "
Removal and Installation".
Te r m i n a l s
ConditionDriver warning
systems ON in-
dicator
(+) (-)
89 When the battery voltage is applied On
When the battery voltage is not applied Off
Revision: 2010 May2011 QX56
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DAS
WARNING BUZZER CIRCUITDAS-393
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
WARNING BUZZER CIRCUIT
Component Function CheckINFOID:0000000006223831
1.CHECK WARNING BUZZER
1.](/img/42/57033/w960_57033-1357.png "INFINITI QX56 2011 Factory Service Manual
DAS
WARNING BUZZER CIRCUITDAS-393
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
WARNING BUZZER CIRCUIT
Component Function CheckINFOID:0000000006223831
1.CHECK WARNING BUZZER
1.")
DAS
WARNING BUZZER CIRCUITDAS-393
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
WARNING BUZZER CIRCUIT
Component Function CheckINFOID:0000000006223831
1.CHECK WARNING BUZZER
1. Turn the ignition switch ON.
2. Select the active test item “LDP BU ZZER” of “ICC/ADAS” with CONSULT-III.
3. With operating the test item, check the operation.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Refer to DAS-393, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006223832
1.CHECK WARNING BUZZER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the warning buzzer connector.
3. Turn ignition switch ON.
4. Check voltage between the warning buzzer harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the warning buzzer power supply circuit.
2.CHECK WARNING BUZZER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between the warning buzzer harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the harnesses or connectors.
3.CHECK WARNING BUZZER SIGNAL CIRCUIT FOR OPEN
1. Disconnect the ADAS control unit connector.
2. Check continuity between the ADAS control uni t harness connector and warning buzzer harness connec-
tor.
Is the inspection result normal?
On : Warning buzzer is activated.
Off : Warning buzzer is not activated.
Te r m i n a l s Vo l ta g e
(Approx.)
(+) (
−)
Warning buzzer Ground
Connector Terminal
M94 1 Battery voltage
Warning buzzer GroundContinuity
Connector Terminal
M94 3 Existed
ADAS control unit Warning buzzer Continuity
Connector Terminal Connector Terminal
B61 12 M94 2 Existed
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Service Manual
DAS-394
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
WARNING BUZZER CIRCUIT
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK WARNING BUZZER SIGNAL CIRCUIT FOR SHORT
Check continuity between](/img/42/57033/w960_57033-1358.png "INFINITI QX56 2011 Factory Service Manual
DAS-394
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
WARNING BUZZER CIRCUIT
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK WARNING BUZZER SIGNAL CIRCUIT FOR SHORT
Check continuity between")
DAS-394
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
WARNING BUZZER CIRCUIT
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK WARNING BUZZER SIGNAL CIRCUIT FOR SHORT
Check continuity between the ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair the harnesses or connectors.
5.CHECK WARNING BUZZER OPERATION
1. Connect the warning buzzer connector.
2. Turn ignition switch ON.
3. Apply ground to warning buzzer terminal 2.
4. Check condition of the warning buzzer.
Does warning buzzer sound?
YES >> Replace the ADAS control unit.
NO >> Replace the warning buzzer.
ADAS control unit
GroundContinuity
Connector Terminal
M61 12 Not existed
Revision: 2010 May2011 QX56
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DAS
LDW & LDP SYSTEM SYMPTOMSDAS-395
< SYMPTOM DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
SYMPTOM DIAGNOSIS
LDW & LDP SYSTEM SYMPTOMS
Symptom TableINFOID:0000000006223833
NOTE:
For the ope](/img/42/57033/w960_57033-1359.png "INFINITI QX56 2011 Factory Service Manual
DAS
LDW & LDP SYSTEM SYMPTOMSDAS-395
< SYMPTOM DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
SYMPTOM DIAGNOSIS
LDW & LDP SYSTEM SYMPTOMS
Symptom TableINFOID:0000000006223833
NOTE:
For the ope")
DAS
LDW & LDP SYSTEM SYMPTOMSDAS-395
< SYMPTOM DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
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K L
M B
N P A
SYMPTOM DIAGNOSIS
LDW & LDP SYSTEM SYMPTOMS
Symptom TableINFOID:0000000006223833
NOTE:
For the operational conditions of Lane Departure Warn ing (LDW) and Lane Departure Prevention (LDP), refer
to the following descriptions.
LDW: DAS-277, "
LANE DEPARTURE WARNING (LDW ) SYSTEM : System Description"
LDP: DAS-280, "LANE DEPARTURE PREVENTION (L DP) SYSTEM : System Description"
Symptom Possible cause Inspection item/Reference page
Indicator/warning lamps do not
illuminate when ignition switch
OFF ⇒ ON Lane departure warning
lamp (Yellow) does not illu-
minate.
Combination meter
ADAS control unit Lane departure warning lamp
does not turned ON
Refer to
DAS-397, "
Description"
LDP ON indicator lamp
(Green) does not illuminate. Combination meter
ADAS control unit LDP ON indicator lamp does not
turned ON
Refer to
DAS-398, "
Description"
Warning systems ON indica-
tor does not illuminate. Harness between ADAS
control unit and warning sys-
tems switch
Warning systems switch
ADAS control unit Warning systems ON indicator
circuit
Refer to
DAS-391, "
Component
Function Check"
Lane departure warning
lamp (Yellow) and LDP ON
indicator lamp (Green) does
not illuminate. Combination meter
ADAS control unit Lane departure warning lamp
does not turned ON
Refer to DAS-397, "Descrip-
tion"
LDP ON indicator lamp does
not turned ON
Refer to DAS-398, "
Descrip-
tion"
All of indicator/warning
lamps does not illuminate;
Lane departure warning
lamp (Yellow)
LDP ON indicator lamp (Green)
Warning systems ON indi- cator Power supply and ground cir-
cuit of ADAS control unit
ADAS control unit Power supply and ground circuit
of ADAS control unit
Refer to
DAS-387, "
ADAS CON-
TROL UNIT : Diagnosis Proce-
dure"
LDW system is not activated.
(Indicator/warning lamps illumi-
nate when ignition switch OFF
⇒ ON) Warning systems ON indica-
tor is not turned ON
⇔ OFF
when operating warning
systems switch Harness between ADAS
control unit and warning sys-
tems switch
Harness between warning systems switch and ground
Warning systems switch
ADAS control unit Warning systems switch circuit
Refer to
DAS-389, "
Component
Function Check"
Warning buzzer is not
sounding.
(Lane departure warning
lamp is activated.) Harness between the IPDM
E/R and warning buzzer
Harness between ADAS control unit and warning
buzzer
Harness between warning buzzer and ground
Warning buzzer
ADAS control unit Warning buzzer circuit
Refer to
DAS-393, "
Component
Function Check"
Revision: 2010 May2011 QX56