sensor INFINITI QX56 2010 Factory Service Manual

LAN-50
< FUNCTION DIAGNOSIS >[CAN]
TROUBLE DIAGNOSIS
0: Error at present, 1 – 39: Error in the past (Number m
eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
Transfer Control Unit
0: Error at present, 1 – 39: Error in the past (Number m eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
ABS Actuator and Electric Unit (Control Unit)
CAUTION:ITEM
CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
M&A TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
TCM Signal receiving status from the TCM
BCM/SEC Signal receiving status from the BCM
VDC/TCS/ABS Signal receiving stat
us from the ABS actua-
tor and electric unit (control unit)
IPDM E/R Signal receiving status from the IPDM E/R
DISPLAY Not used even though indicated
I-KEY Signal receiving status from the Intelligent
Key unit
OKOK
or
1 – 39
*UNKWN 0
EPS Not used even though indicated
AWD/4WD
e4WD
ICC Signal receiving status from the ICC unit OK OK
or
1 – 39
*UNKWN 0
LANE CAMERA Not used even though indicated
TIRE-P
ITEM CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
4WD TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
VDC/TCS/ABS Signal receiving stat
us from the ABS actua-
tor and electric unit (control unit)
TCM Signal receiving status from the TCM
STRG Signal receiving status from the steering an-
gle sensor
ITEMCAN DIAG SUP-
PORT MNTR DescriptionNormal Error
PRSNT
ABS INITIAL DIAG Status of CAN controller
OKNG
Caution
TRANSMIT DIAG Signal transmission status
UNKWN
ECM Signal receiving status from the ECM
TCM Signal receiving status from the TCM
METER/M&A Not used even though indicated
STRG Signal receiving status from the steering angle sensor
OK UNKWN
ICC Signal receiving status from the ICC unit
AWD/4WD Signal receiving status from the transfer control unit
Revision: April 20092010 QX56

LAN-52
< COMPONENT DIAGNOSIS >[CAN]
CAN COMMUNICATION SYSTEM
COMPONENT DIAGNOSIS
CAN COMMUNICATION SYSTEM
Component Parts LocationINFOID:0000000005146466
1. ECM E16
2. IPDM E/R E122 3. ICC sensor E42
4. AV control unit M45 5. Combination meter M246. ABS actuator and electric unit (con-
trol unit) E125
7. Intelligent Key unit M70 8. BCM M189. Data link connector M22
10. Steering angle sensor M17 11. Driver seat control unit B202 12. ICC unit B13
13. Air bag diagnosis sensor unit M35 14. A/T assembly F9 15. A/C auto amp. M50
16. Transfer control unit E142
AWMIA0011ZZ
Revision: April 20092010 QX56

LAN-60
< COMPONENT DIAGNOSIS >[CAN]
MALFUNCTION AREA CHART
MALFUNCTION AREA CHART
Main LineINFOID:0000000005146468
Branch LineINFOID:0000000005146469
Short CircuitINFOID:0000000005146470
Malfunction area
Reference
Main line between TCM and driver seat control unit LAN-61, "
Diagnosis Procedure"
Main line between TCM and ICC sensorLAN-63, "Diagnosis Procedure"
Main line between ICC sensor and ICC unitLAN-64, "Diagnosis Procedure"
Main line between ICC unit and driver seat control unitLAN-65, "Diagnosis Procedure"
Main line between driver seat control unit and AV control unitLAN-66, "Diagnosis Procedure"
Main line between AV control unit and data link connectorLAN-67, "Diagnosis Procedure"
Main line between data link connector and combination meterLAN-68, "Diagnosis Procedure"
Main line between combination meter and ABS actuator and
electric unit (control unit)LAN-69, "Diagnosis Procedure"
Main line between combination meter and transfer control unit
LAN-70, "Diagnosis Procedure"
Main line between transfer control unit and ABS actuator and
electric unit (control unit)LAN-71, "Diagnosis Procedure"
Malfunction area
Reference
ECM branch line circuit LAN-72, "
Diagnosis Procedure"
TCM branch line circuitLAN-73, "Diagnosis Procedure"
ICC sensor branch line circuitLAN-74, "Diagnosis Procedure"
ICC unit branch line circuitLAN-75, "Diagnosis Procedure"
Driver seat control unit branch line circuitLAN-76, "Diagnosis Procedure"
AV control unit branch line circuitLAN-77, "Diagnosis Procedure"
BCM branch line circuitLAN-78, "Diagnosis Procedure"
Data link connector branch line circuitLAN-79, "Diagnosis Procedure"
A/C auto amp. branch line circuitLAN-80, "Diagnosis Procedure"
Intelligent Key unit branch line circuitLAN-81, "Diagnosis Procedure"
Combination meter branch line circuitLAN-82, "Diagnosis Procedure"
Steering angle sensor branch line circuitLAN-83, "Diagnosis Procedure"
Transfer control unit branch line circuitLAN-84, "Diagnosis Procedure"
ABS actuator and electric unit (control unit) branch line circuit LAN-85, "Diagnosis Procedure"
IPDM E/R branch line circuit LAN-86, "Diagnosis Procedure"
Malfunction area Reference
CAN communication circuit LAN-87, "
Diagnosis Procedure"
Revision: April 20092010 QX56

LAN
MAIN LINE BETWEEN TCM AND LASER CIRCUITLAN-63
< COMPONENT DIAGNOSIS > [CAN]
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MAIN LINE BETWEEN TC
M AND LASER CIRCUIT
Diagnosis ProcedureINFOID:0000000005146472
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).
- Harness connector F14
- Harness connector E5
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the harness connectors F14 and E5.
2. Check the continuity between the harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the A/T assembly and the harness connector F14.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of ICC sensor.
2. Check the continuity between the harness connector and the ICC sensor harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU
list” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main line between the A/T assembly and the ICC sensor.
NO >> Repair the main line between the harness connector E5 and the ICC sensor.
Connector No. Terminal No. Continuity
F14 35E
xis te d
14 15Existed
Harness connector ICC sensor harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
E5 5
E42 2
Existed
15 3Existed
Revision: April 20092010 QX56

LAN-64
< COMPONENT DIAGNOSIS >[CAN]
MAIN LINE BETWEEN LASER AND ICC CIRCUIT
MAIN LINE BETWEEN LA
SER AND ICC CIRCUIT
Diagnosis ProcedureINFOID:0000000005146473
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (connector side and harness side).
- Harness connector E34
- Harness connector B40
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- ICC sensor
- Harness connectors E34 and B40
2. Check the continuity between the ICC sens or harness connector and the harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the ICC sensor and the harness connector E34.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of ICC unit.
2. Check the continuity between the harness connector and the ICC unit harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECUlist” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the ma in line between the ICC sensor and the ICC unit.
NO >> Repair the main line between the harness connector B40 and the ICC unit.
ICC sensor harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
E42 2
E34 24
Existed
3 23Existed
Harness connector ICC unit harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
B40 24
B13 14
Existed
23 5Existed
Revision: April 20092010 QX56

LAN
TCM BRANCH LINE CIRCUITLAN-73
< COMPONENT DIAGNOSIS > [CAN]
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TCM BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000005152919
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the terminals and connectors of the A/T assembly for damage, bend and loose connection (unit
side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of A/T assembly.
2. Check the resistance between the A/T assembly harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the TCM branch line.
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Remove the control valve with TCM. Refer to TM-172, "
Control Valve with TCM and A/T Fluid Tempera-
ture Sensor 2 and Plug".
2. Disconnect the connector of TCM.
3. Check the continuity between the A/T a ssembly connector and the TCM harness connector.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair the harness between the A/T asse mbly connector and the TCM harness connector.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the TCM. Refer to TM-94, "
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the control valve with TCM. Refer to TM-172, "Control Valve with TCM and A/
T Fluid Temperature Sensor 2 and Plug".
YES (Past error)>>Error was detected in the TCM branch line.
NO >> Repair the power supply and the ground circuit.
A/T assembly harness connector Resistance (Ω)
Connector No. Terminal No.
F9 3 8 Approx. 54 – 66
A/T assembly connector TCM harness connector
Continuity
Terminal No. Connector No. Terminal No.
3 F502 1
Existed
82 Exis te d
Revision: April 20092010 QX56

LAN-74
< COMPONENT DIAGNOSIS >[CAN]
LASER BRANCH LINE CIRCUIT
LASER BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000005146481
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the ICC s ensor for damage, bend and loose connection (unit side
and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of ICC sensor.
2. Check the resistance between the ICC sensor harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the ICC sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ICC sensor. Refer to CCS-48, "
Wiring Diagram".
Is the inspection result normal?
YES (Present error)>>Replace the ICC sensor. Refer to CCS-72, "ICC Sensor".
YES (Past error)>>Error was detect ed in the ICC sensor branch line.
NO >> Repair the power supply and the ground circuit.
ICC sensor harness connector Resistance (Ω)
Connector No. Terminal No.
E42 23Approx. 54 – 66
Revision: April 20092010 QX56

LAN
STRG BRANCH LINE CIRCUITLAN-83
< COMPONENT DIAGNOSIS > [CAN]
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STRG BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000005146490
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the terminals and connectors of the steer ing angle sensor for damage, bend and loose connection
(unit side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of steering angle sensor.
2. Check the resistance between the steering angle sensor harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the steering angle sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-92, "
Wiring Dia-
gram - BRAKE CONTROL SYSTEM -".
Is the inspection result normal?
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-118, "Removal and Installation".
YES (Past error)>>Error was detected in the steering angle sensor branch line.
NO >> Repair the power supply and the ground circuit.
Steering angle sensor harness connector Resistance (Ω)
Connector No. Terminal No.
M17 4 5 Approx. 54 – 66
Revision: April 20092010 QX56

LU-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005260134
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation After Battery Disconnect
INFOID:0000000005260135
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
Revision: April 20092010 QX56

PRECAUTIONSMA-3
< PRECAUTION >
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M B
MA
N
O A
PRECAUTION
PRECAUTIONS
Precaution for Supplemental
Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005403129
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000005403130
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng both battery cables with the ignition knob in the
″ LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS , an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
Revision: April 20092010 QX56