turn signal INFINITI QX56 2008 Factory Service Manual

INTELLIGENT KEY UNITSEC-97
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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DTC Inspection Priority ChartINFOID:0000000001539170
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000001539171
NOTE: Details of time display
• CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni-
tion switch OFF → ON again.
• 1 - 39: Displayed if any previous ma lfunction is present when current conditi on is normal. It increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition whenever ignition switch OFF → ON. The counter
remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch
OFF → ON after returning to the normal condi tion if the malfunction is detected again.
Priority DTC
1 • U1000: CAN COMM CIRCUIT
• U1010: CONTROL UNIT (CAN)
• B2552: INTELIGENT KEY
2 • B2013: STRG COMM 1
• B2590: NATS MALFUNCTION
CONSULT display
Detection conditionFail-safe Diagnosis
No DTC is detected.
further testing
may be required. ——
—
U1000: CAN COMM CIRCUIT Intelligent Key unit cannot receive CAN communi-
cation signal continuously for 2 seconds or more.
—Check CAN communi-
cation system.
Refer to SEC-24
U1010: CONTROL UNIT (CAN)
Intelligent Key unit detects internal CAN communi-
cation circuit malfunction.
—Replace Intelligent Key
unit.
B2013: STRG COMM 1 The ID verification result between Intelligent key
unit and steering lock solenoid are NG. Or Intelligent
Key unit cannot communicate with steering lock so-
lenoid. ×
Perform steering lock
solenoid ID registration
with CONSULT-III
B2552: INTELLIGENT KEY Intelligent Key unit internal malfunction. ×Replace Intelligent Key
unit.
B2590: NATS MALFUNCTION The ID verification result between Intelligent key
unit and BCM are NG. Or Intelligent Key unit cannot
communicate with BCM. ×
Check NATS
Refer to SEC-38
Revision: March 2010
2008 QX56

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
SEC-109
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If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
NOTE:
The tail lamp turns OFF when the ignition switch is turned ON.
FRONT WIPER CONTROL
IPDM E/R detects front wiper stop posit ion by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 second activation and 20 second stop five times.
NOTE:
This operation status can be confirmed on the IPDM E/R “DATA MONITOR” that displays “Block” for the item
“WIP PROT” while the wiper is stopped.
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.
Control part Fail-safe in operation
Cooling fan • Turns ON the cooling fan relay when the ignition switch is turned ON
• Turns OFF the cooling fan relay when the ignition switch is turned OFF
Control part
Fail-safe in operation
Headlamp • Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high relay OFF
•Parking lamps
• License plate lamps
• Tail lamps • Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper • The status just before activation of fail-safe control is maintained until the ignition
switch is turned OFF while the front wiper is operating at LO or HI speed.
• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail- safe control is activated while the front wipe r is set in the INT mode and the front wiper
motor is operating.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C relay OFF
Front fog lamps Front fog lamp relay OFF
Ignition switch Ignition relayTail lamp relay
ON ON —
OFF OFF —
Ignition switchFront wiper switch Auto stop signal
ON OFF
Front wiper stop position signal cannot be
input 10 seconds.
ON The signal does not change for 10 seconds.
Revision: March 2010 2008 QX56

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION SYMPTOMS
SEC-111
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SYMPTOM DIAGNOSIS
INTELLIGENT KEY SYSTEM/ENGIN E START FUNCTION SYMPTOMS
Symptom TableINFOID:0000000001539175
NOTE:
• Before performing the diagnosis in the following table, check “ SEC-3, "
Work Flow"”.
• Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and check each symptom.
• Engine cranking is enabled when the shift lever is in the "Park" position, and in the "Neutral" position only if the brake pedal is depressed.
• If the following symptoms are detec ted, check systems shown in the “Diagnosis/service procedure” column
in this order.
CONDITIONS OF VEHICLE (OPERATING CONDITIONS)
• Engine start function is ON when setting on CONSULT-III.
• Mechanical key is not inserted in key cylinder.
• One or more of Intelligent Keys with registered Intelligent Key ID is in the vehicle.
Symptom Diagnosis/service procedureReference
page
Ignition switch does not turn on with Intelligent Key.
[LCD displays "KEY DETECTED"] 1. Check steering lock solenoid.
DLK-95
2. Replace Intelligent Key unit.SEC-116
Ignition switch does not turn on with Intelligent Key.
[LCD does not display "PUSH" with arrow toward key
cylinder] 1. Check Intelligent Key unit power supply and ground circuit.
DLK-642. Check ignition knob switch.DLK-112
3. Check key switch (BCM input). D L K - 111
4. Check key switch (Intelligent Key unit input).DLK-109
5. Replace Intelligent Key unit.SEC-116
Ignition switch does not turn on with Intelligent Key.
[LCD displays " NO KEY"] 1a. Check inside key antenna 1 (rear of center console).
DLK-56
1b. Check inside key antenna 2 (luggage compartment).DLK-58
1c. Check inside key antenna 3 (front of center console).DLK-60
1d. Check inside key antenna 4 (overhead console area).DLK-64
2. Replace Intelligent Key unit.SEC-116
Ignition switch does not turn on with mechanical key1. Check key switch (BCM input).
D L K - 1112. Check key switch (Intelligent Key unit input).DLK-109
Engine cannot be cranked with transmission in "Park"
or in "Neutral" position with brake pedal depressed.1. Check transmission signal.
TM-43
2. Check stop lamp switch.EXL-81
Revision: March 2010 2008 QX56

SN-6
< FUNCTION DIAGNOSIS >
REAR SONAR SYSTEM
FUNCTION DIAGNOSIS
REAR SONAR SYSTEM
System DiagramINFOID:0000000001754056
System DescriptionINFOID:0000000001754057
FUNCTION
With power and ground supplied, transmission gear selector lever in R position, and the sonar system OFF
switch ON, the rear sonar system will detect obstacles withi n 1.8 m (5.9 ft.) of the rear sonar sensors. The
vehicle operator is notified of obstacles by varied rate of tone from the rear sonar buzzer depending on dis-
tance of obstacle being sensed.
SONAR SYSTEM OFF SWITCH
With power and ground supplied to the sonar control unit, transmission gear selector lever in R position, the
sonar system can be disabled and the rear sonar buzze r silenced by momentarily pressing the sonar system
OFF switch. The sonar system OFF indicator lamp will be illuminated in the sonar system OFF switch.
The rear sonar system and buzzer will be disabled and t he sonar system OFF indicator will be illuminated until
the ignition switch is turned OFF. When the ignition switch is turned ON, the rear sonar system will be
enabled. Depressing the sonar system OFF switch again will enable the rear sonar system also. Enabling the
rear sonar system will cause the rear sonar system OFF i ndicator to go out. If the indicator light is blinking
there is a malfunction in the system.
REAR SONAR BUZZER
With power and ground supplied to the sonar control unit and the A/T selector lever in R position, a stationary
object that is at least 7.0 cm (2.8 in.) wide and 1.0 m (39. 0 in.) tall and that is closer than 1.8 m (5.9 ft.) will be
detected by the rear sonar sensors, causing the rear sonar buzzer to sound a tone. As the vehicle moves
closer to the object, the rate of the tone will increase. When the object is less than 25.0 cm (10 in.) from the
rear bumper, the tone will sound continuously.
REAR SONAR SENSORS
With power and ground supplied to the rear sonar sens ors, the sonar sensors transmit an ultrasonic signal.
This signal is reflected back to the sensor by objects large enough and close enough to be detected. The rear
sonar sensors measure the time from the transmitted si gnal to the time the signal is reflected back and sends
this information to the sonar control unit.
BACK-UP LAMP RELAY
The back-up lamp relay provides a reverse signal to the sonar control unit.
AWNIA0127GB
Revision: March 2010 2008 QX56

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REAR SONAR SYSTEMSN-7
< FUNCTION DIAGNOSIS >
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Component Parts LocationINFOID:0000000001754058
Component DescriptionINFOID:0000000001754059
Self-Diagnosis FunctionINFOID:0000000001754060
There are four modes of self-diagnosis. Thes e modes must be followed in the following order:
1. Entering diagnostics mode
2. Requesting number of fault codes mode
3. Requesting fault codes mode
4. Clearing fault codes mode
Self-diagnosis can be manually exited by turning the igni tion OFF or selecting reverse gear. Self-diagnosis will
exit unless a fault code request occurs before a me ssage is repeated five times without acknowledgement.
ENTERING DIAGNOSTICS MODE
1. Sonar control unit B56
(view with luggage side finisher LH removed) 2. Back-up lamp relay M73 3. A/T assembly F9
4. Rear sonar buzzer M117 5. Sonar system OFF switch M116
(with sonar system OFF indicator) 6. Rear sonar sensor LH outer C102
7. Rear sonar sensor LH inner C103 8. Rear sonar sensor RH inner C104 9. Rear sonar sensor RH outer C105
ALNIA0374ZZ
Component Function
Sonar control unit Controls sonar system and provides self-diagnosis
Back-up lamp relay Provides reverse signal for sonar control unit
A/T assembly Controls back-up lamp relay
Rear sonar buzzer Sounds a signal when objects are detected in the rear of the vehicle
Sonar system OFF switch Enables the driver to turn system off and signals a system malfunction
Sonar sensor Senses objects in the rear of the vehicle
Revision: March 2010 2008 QX56

SN-10
< FUNCTION DIAGNOSIS >
FRONT AND REAR SONAR SYSTEM
FRONT AND REAR SONAR SYSTEM
System DiagramINFOID:0000000001754061
System DescriptionINFOID:0000000001754062
FUNCTION
With power and ground supplied, transmission gear selector lever in R position, and the sonar system OFF
switch ON, the sonar system will detect obstacles within 1.8 m (5.9 ft.) of the rear sonar sensors and the two
outer front sonar sensors. The vehicle operator is notif ied of obstacles by varied rate of tone from the rear
sonar buzzer depending on distance of obstacle being sens ed. If the vehicle speed reaches 50 km/h (31
MPH) the sonar syst em will shut down.
With power and ground supplied, transmission gear selector lever in a forward drive gear, and the sonar sys-
tem OFF switch ON, the front sonar system will detect obstacles within 1.0 m (3 ft.) of the front sonar sensors.
The vehicle operator is notified of obstacles by varied rate of tone from the front sonar buzzer depending on
distance of obstacle being sensed. When the vehicle accelerates to 12 km/h (7.5 MPH) the sonar system will
shut down. When the vehicle decelerates to 8 km/h (5 MPH) the sonar system will turn back on.
SONAR SYSTEM OFF SWITCH
With power and ground supplied to the sonar control unit, transmission gear selector lever in a position other
than P, the sonar system can be di sabled and the sonar buzzers silenced by momentarily pressing the sonar
system OFF switch. The sonar system OFF indicator lamp will be illuminated in the sonar system OFF switch.
The sonar system and buzzers will be di sabled and the sonar system OFF indicator will be illuminated until the
ignition switch is turned OFF. When the ignition switch is turned ON, the sonar system will be enabled.
Depressing the sonar system OFF switch again will enabl e the sonar system also. Enabling the sonar system
will cause the sonar system OFF indicator to go out. The indicator will flash if a malfunction exists in the sys-
tem.
SONAR BUZZERS
With power and ground supplied to the sonar control unit and the A/T selector lever in R position, a stationary
object that is at least 9.0 cm (3.5 in.) wide and that is closer than 1.8 m (5.9 ft.) will be detected by the rear
sonar sensors and the two outer front sonar sensors, causing the rear sonar buzzer to sound a tone. As the
vehicle moves closer to the object, the rate of the tone will increase. When the object is less than 25.0 cm (10
in.) from the rear bumper, the tone will sound continuously.
With power and ground supplied to the sonar control unit and the A/T selector lever in a forward drive gear, a
stationary object that is at least 9.0 cm (3.5 in.) wide and that is closer than 1.0 m (3 ft.) will be detected by the
front sonar sensors, causing the front sonar buzzer to sound a tone. As the vehicle moves closer to the object,
the rate of the tone will increase. When the object is less than 30 cm (12 in.) from the front bumper, the tone
will sound continuously.
REAR SONAR SENSORS
With power and ground supplied to the rear sonar sens ors, the sonar sensors transmit an ultrasonic signal.
This signal is reflected back to the sensor by objects large enough and close enough to be detected. The rear
AWNIA0128GB
Revision: March 2010 2008 QX56

SN-12
< FUNCTION DIAGNOSIS >
FRONT AND REAR SONAR SYSTEM
Component Description
INFOID:0000000001754064
CONSULT-III Function (SONAR)INFOID:0000000001754065
SELF DIAGNOSTIC PROCEDURE
CONSULT-III can be used to read and clear DTCs. Refer to GI-46, "Description".
SELF DIAGNOSTIC RESULTS
Refer to SN-44, "DTC Index".
Component Function
Sonar control unit Controls sonar system and provides self-diagnosis
Back-up lamp relay Provides reverse signal for sonar control unit
A/T assembly Controls back-up lamp relay
Front sonar buzzer Sounds a signal when objects are detected in the front of the vehicle
Rear sonar buzzer Sounds a signal when objects are detected in the rear of the vehicle
Sonar system OFF switch Enables the driver to turn the system off and signals a system malfunction
Front sonar sensors Senses objects in the front of the vehicle
Rear sonar sensors Senses objects in the rear of the vehicle
Combination meter Provides Park and vehicle speed signals for sonar control unit
Diagnosis mode Description
SELF-DIAG RESULTS Displays sonar control unit self-diagnosis results.
Revision: March 2010 2008 QX56

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SONAR SENSOR CIRCUIT INSPECTIONSN-15
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SONAR SENSOR CIRCUIT INSPECTION
DescriptionINFOID:0000000004832343
With power and ground supplied to the sonar sensors, the sonar sensors transmit an ultrasonic signal. This
signal is reflected back to the sensor by objec ts large enough and close enough to be detected. The sonar
sensors measure the time from the transmitted signal to the time the signal is reflected back and send this
information to the sonar control unit.
Diagnosis Procedure (With Rear Sonar System)INFOID:0000000004832344
1.CHECK REAR SONAR SENSOR CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connector and rear sonar sensor connectors.
3. Check continuity between sonar control unit harness connector (A) and rear sonar sensor harness connectors (B).
4. Check continuity between sonar control unit harness connector and ground.
Are the inspection results normal?
YES >> Inspection End.
NO >> Repair harness or connector.
Diagnosis Procedure (With Front and Rear Sonar System)INFOID:0000000004832345
1.CHECK SONAR SENSOR CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connec tors and sonar sensor connectors.
3. Check continuity between sonar control unit harness connectors (A, B) and sonar sensor harness connectors (C).
Connector Terminal ConnectorTerminal Continuity
B56 (A) 16
C102, C103, C104, C105 (B) 1
Ye s
15 3
9, 10, 11, 12 2
AWNIA1501ZZ
ConnectorTerminalContinuity
B56 9, 10, 11, 12, 15, 16 Ground No
AWNIA1502ZZ
Connector TerminalConnectorTerminal Continuity
B56 (A) 9
C102, C103, C104, C105 (C) 1
Ye s
12
3
13, 14, 15, 16 2
B57 (B) 17
E158, E162, E1 63, E166 (C) 1
26 3
19, 20, 24, 25 2
AWNIA1877ZZ
Revision: March 2010 2008 QX56

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SONAR CONTROL UNIT FOR REAR SONAR SYSTEMSN-21
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ECU DIAGNOSIS
SONAR CONTROL UNIT FO R REAR SONAR SYSTEM
Reference ValueINFOID:0000000001754070
SONAR CONTROL UNIT TERMINAL LAYOUT
TERMINALS AND REFERENCE VA LUES FOR SONAR CONTROL UNIT
WKIA5222E
Te r m i n a l
(wire color) Item Condition
Reference value (V)
(Approx.)
Ignition
switch Operation
3 (R) Sonar buzzer return ON —0 - 12 (variable)
4 (BR/Y) Sonar system OFF
indicator output ON
Sonar system OFF
switch ON
0
OFF Battery voltage
5 (G/W) Reverse signal ONTransmission gear se-
lector lever
R position
Battery voltage
Transmission gear se-
lector lever Not R position
0
6 (B) Sonar control unit
ground ——
0
7 (L) Sonar buzzer drive
signal
ON
— Battery voltage
8 (G/R) Sonar control unit
power ON
— Battery voltage
9 (GR) Rear sonar sensor
signal - RH outer
ON• Rear sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• No obstacles Battery voltage
10 (P) Rear sonar sensor
signal - LH outer
ON• Rear sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• No obstacles Battery voltage
11 ( O ) Rear sonar sensor
signal - LH inner
ON• Rear sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• Distance obstacles Battery voltage
12 (LG) Rear sonar sensor
signal - RH inner
ON• Rear sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• Distance obstacles Battery voltage
13 (LG) Sonar system OFF
switch signal
ONSonar system OFF
switch ON
0
OFF Battery voltage
Revision: March 2010 2008 QX56

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SONAR CONTROL UNIT FOR FRONT AND REAR SONAR SYSTEMSN-31
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SONAR CONTROL UNIT FOR FR ONT AND REAR SONAR SYSTEM
Reference ValueINFOID:0000000001754073
SONAR CONTROL UNIT HARNESS TERMINAL LAYOUT
TERMINALS AND REFERENCE VA LUES FOR SONAR CONTROL UNIT
ALNIA0395ZZ
Te r m i n a l
(color) Item Condition
Reference value (V)
(Approx.)
Ignition
switch Operation
1 (G/R) Sonar control unit
power ON
— Battery voltage
2 (L) Sonar buzzer drive
signal
ON Object sensed
Battery voltage
3 (G/W) Reverse signal ONTransmission gear selector lever in R posi-
tion
Battery voltage
Transmission gear selector lever not in R
position 0
4 (B) Sonar control unit
ground ——
—
5 (BR/Y) Sonar system OFF
indicator output ON
Sonar system OFF
switch ON
0
OFF Battery voltage
6 (R) Rear sonar buzzer
return
ON
— 0 - 12 (variable)
8 (G/W) K-line ON— —
9 (LG/B) Rear sonar sensor
power ON Ignition switch ON
Battery voltage
11 ( L G ) Sonar system OFF
switch signal
ONSonar system OFF
switch ON
0
OFF Battery voltage
12 (Y) Rear sonar sensor
ground ON
— —
13 (LG) Rear sonar sensor
signal - RH inner ON• Sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• Distance obstacles Battery voltage
14 (O) Rear sonar sensor
signal - LH inner ON• Sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• Distance obstacles Battery voltage
15 (P) Rear sonar sensor
signal - LH outer ON• Sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• No obstacles Battery voltage
Revision: March 2010
2008 QX56