Ignition switch INFINITI QX56 2010 Factory Service Manual

SN-14
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1.CHECK FUSES
Check for blown sonar system fuses.
Are any fuses blown?
YES >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to GI-
41, "Circuit Inspection".
NO >> GO TO 2.
2.CHECK POWER SUPPLY CIRCUIT
1. Disconnect sonar control unit connector B56.
2. Turn ignition switch ON.
3. Check voltage between sonar control unit connector B56 termi- nal 1 and ground.
Is there battery voltage?
YES >> GO TO 3.
NO >> Check harness for open between sonar control unit and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between sonar control unit connector B56 ter-
minal 4 and ground.
Is there continuity?
YES >> Inspection End.
NO >> Check harness ground circuit.
Unit Power Source FuseLocation
Sonar control unit ON or START 12
Fuse block (J/B)
51 IPDM E/R
Te r m i n a l s
Vo l ta g e
(+)
(-)
Connector Terminal
B56 1 Ground Battery voltage
AWNIA1574ZZ
Te r m i n a l s
Continuity
(+)
(–)
Connector Terminal
B56 4Ground Yes
AWNIA1575ZZ
Revision: April 20092010 QX56

SN
SONAR SENSOR CIRCUIT INSPECTIONSN-15
< COMPONENT DIAGNOSIS >
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SONAR SENSOR CIRCUIT INSPECTION
DescriptionINFOID:0000000005146196
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:0000000005146197
Regarding Wiring Diagram information, refer to SN-23, "Wiring Diagram".
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:0000000005146198
Regarding Wiring Diagram information, refer to SN-33, "Wiring Diagram".
1.CHECK SONAR SENSOR CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connec tors and sonar sensor connectors.
Connector TerminalConnectorTerminal Continuity
B24 (A) 16
C102, C103, C104, C105 (B) 1
Ye s
15 3
9, 10, 11, 12 2
AWNIA1501ZZ
ConnectorTerminalContinuity
B24 9, 10, 11, 12, 15, 16 Ground No
AWNIA1502ZZ
Revision: April 20092010 QX56

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SONAR BUZZER CIRCUIT INSPECTIONSN-17
< COMPONENT DIAGNOSIS >
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SONAR BUZZER CIRCUIT INSPECTION
DescriptionINFOID:0000000005146199
When the A/T selector lever is not it park or neutral, a stationary object will be detected by the sonar sensors
causing the front or 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 very cl ose to the vehicle, the tone will sound continuously.
Diagnosis Procedure (With Rear Sonar System)INFOID:0000000005146200
Regarding Wiring Diagram information, refer to SN-23, "Wiring Diagram".
1.CHECK SONAR BUZZER
Refer to SN-18, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace sonar buzzer. Refer to SN-51, "
Removal and Installation".
2.CHECK SONAR BUZZER CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connector and sonar buzzer connector.
3. Check continuity between sonar control unit harness connector (A) and sonar buzzer harness connector (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:0000000005146201
Regarding Wiring Diagram information, refer to SN-33, "Wiring Diagram".
1.CHECK BUZZERS
Refer to SN-18, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 2.
Connector Terminal Connector Terminal Continuity
B24 (A) 3
M47 (B) 2
Ye s
71
AWNIA1576ZZ
Connector TerminalContinuity
B24 3, 7Ground No
AWNIA1504ZZ
Revision: April 20092010 QX56

SN-18
< COMPONENT DIAGNOSIS >
SONAR BUZZER CIRCUIT INSPECTION
NO >> Replace buzzer. Refer to SN-51, "Removal and Installation".
2.CHECK BUZZER CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connectors and sonar buzzer connectors.
3. Check continuity between sonar control unit harness connectors
(A, B) and sonar buzzer harness connectors (C).
4. Check continuity between sonar control unit harness connectors
(A, B) and ground.
Are the inspection results normal?
YES >> Inspection End.
NO >> Repair harness or connector.
Component InspectionINFOID:0000000005146202
SONAR BUZZER
1. Disconnect the sonar buzzer connector.
2. Check continuity between sonar buzzer terminals 1 and 2.
Connector Terminal Connector Terminal Continuity
B56 (A) 2
B166, M118 (C) 1
Ye s
6 B166 (C)
2
B57 (B) 23 M118 (C)
AWNIA1545ZZ
ConnectorTerminalContinuity
B56 (A) 2, 6
Ground No
B57 (B) 23
AWNIA1546ZZ
1 - 2 : Continuity should exist
WKIA4417E
Revision: April 20092010 QX56

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SONAR SYSTEM OFF SWITCH CIRCUIT INSPECTIONSN-19
< COMPONENT DIAGNOSIS >
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SONAR SYSTEM OFF SWITCH CIRCUIT INSPECTION
DescriptionINFOID:0000000005146203
The sonar system can be disabled by momentarily pressing the sonar system OFF switch. The sonar system
OFF indicator lamp will be illuminated when the sonar s ystem is OFF. Enabling the sonar system will cause
the sonar system OFF indicator to go out. The indica tor will flash if a malfunction exists in the system.
Diagnosis Procedure (With Rear Sonar System)INFOID:0000000005146204
Regarding Wiring Diagram information, refer to SN-23, "Wiring Diagram".
1.CHECK SONAR SYSTEM OFF SWITCH
Refer to SN-20, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace sonar system OFF switch. Refer to IP-14, "
Removal and Installation".
2.CHECK SONAR SYSTEM OFF SWITCH CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connector and sonar system OFF switch connector.
3. Check continuity between sonar control unit harness connector (A) and sonar system OFF switch harness connector (B).
4. Check continuity between sonar system OFF switch 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:0000000005146205
Regarding Wiring Diagram information, refer to SN-33, "Wiring Diagram".
1.CHECK SONAR SYSTEM OFF SWITCH
Refer to SN-20, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 2.
Connector Terminal Connector Terminal Continuity
B24 (A) 4
M116 (B) 5
Ye s
13 1
AWNIA1577ZZ
ConnectorTerminalContinuity
M116 1, 5
Ground No
2, 6 Yes
AWNIA1578ZZ
Revision: April 20092010 QX56

SN-20
< COMPONENT DIAGNOSIS >
SONAR SYSTEM OFF SWITCH CIRCUIT INSPECTION
NO >> Replace sonar system OFF switch. Refer to IP-14, "Removal and Installation".
2.CHECK SONAR SYSTEM OFF SWITCH CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connector and sonar system OFF switch connector.
3. Check continuity between sonar control unit harness connector (A) and sonar system OFF switch harness connector (B).
4. Check continuity between sonar system OFF switch harness connector and ground.
Are the inspection results normal?
YES >> Inspection End.
NO >> Repair harness or connector.
Component InspectionINFOID:0000000005146206
SONAR SYSTEM OFF SWITCH
1. Disconnect the sonar system OFF switch connector.
2. Check continuity between the following switch terminals.
SONAR SYSTEM OFF INDICATOR
1. Disconnect the sonar system OFF switch connector.
2. Apply battery voltage to switch terminal 5.
3. Check the sonar system OFF indicator operation when switch terminal 6 is connected to battery ground.
Connector Terminal Connector Terminal Continuity
B56 (A) 5
M116 (B) 5
Ye s
11 1
ALNIA1087ZZ
ConnectorTerminalContinuity
M116 1, 5
Ground No
2, 6 Yes
ALNIA1088ZZ
Sonar system OFF switch Terminals Continuity
Depressed 1 - 2Ye s
Released No
AWNIA0181ZZ
Terminals Condition Operation
Sonar system
OFF switch 5
Battery voltage
Indicator ON
6G ro u nd
AWNIA0182ZZ
Revision: April 20092010 QX56

SN
SONAR CONTROL UNIT FOR REAR SONAR SYSTEMSN-21
< ECU DIAGNOSIS >
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ECU DIAGNOSIS
SONAR CONTROL UNIT FO R REAR SONAR SYSTEM
Reference ValueINFOID:0000000005146207
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• 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• 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• 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• 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: April 20092010 QX56

SN-22
< ECU DIAGNOSIS >
SONAR CONTROL UNIT FOR REAR SONAR SYSTEM
15 (Y)Rear sonar sensor
ground
ON
— 0
16 (LG/B) Rear sonar sensor
power ON Ignition switch ON
Battery voltage
Te r m i n a l
(wire color) Item Condition
Reference value (V)
(Approx.)
Ignition
switch Operation
Revision: April 20092010 QX56

SN
SONAR CONTROL UNIT FOR FRONT AND REAR SONAR SYSTEMSN-31
< ECU DIAGNOSIS >
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SONAR CONTROL UNIT FOR FR ONT AND REAR SONAR SYSTEM
Reference ValueINFOID:0000000005146210
SONAR CONTROL UNIT HARNESS TERMINAL LAYOUT
TERMINALS AND REFERENCE VA LUES FOR SONAR CONTROL UNIT
AWNIA1547ZZ
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: April 20092010 QX56

SN-32
< ECU DIAGNOSIS >
SONAR CONTROL UNIT FOR FRONT AND REAR SONAR SYSTEM
16 (GR)Rear sonar sensor
signal - RH outer ON• Sonar system OFF switch ON
• Transmission gear selector lever in R po-
sition
• No obstacles Battery voltage
17 (LG/B) Front sonar sensor
power
ON Ignition switch ON
Battery voltage
18 (GR/R) Park position signal ON Vehicle in PARK 12
19 (GR) Front sonar sensor
signal - RH outer ON• Sonar system OFF switch ON
• Transmission gear selector lever in a for-
ward drive gear
• Distance obstacles Battery voltage
20 (LG) Front sonar sensor
signal - RH inner ON• Sonar system OFF switch ON
• Transmission gear selector lever in re-
verse or a forward drive gear
• No obstacles Battery voltage
21 (W/R) Vehicle speed signal ON Speedometer operated
[When vehicle speed is approx. 40 km/h (25
MPH)]NOTE:
Maximum voltage may be 12V due
to specifications (connected units).
23 (R) Front sonar buzzer
return ON
— 0 - 12 (variable)
24 (P) Front sonar sensor
signal - LH outer
ON• Sonar system OFF switch ON
• Transmission gear selector lever in re-
verse or a forward drive gear
• No obstacles Battery voltage
25 (O) Front sonar sensor
signal - LH inner
ON• Sonar system OFF switch ON
• Transmission gear selector lever in a for-
ward drive gear
• Distance obstacles Battery voltage
26 (Y) Front sonar sensor
ground ON
— —
Te r m i n a l
(color) Item Condition
Reference value (V)
(Approx.)
Ignition
switch Operation
PKIC0643E
Revision: April 20092010 QX56