ignition switch INFINITI FX35 2006 Service Manual

TROUBLE DIAGNOSIS ATC-109
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AT C
Revision: 2006 December 2006 FX35/FX45
Sunload Sensor CircuitNJS000EH
COMPONENT DESCRIPTION
Sunload Sensor
The sunload sensor is located on the passenger’s side front
defroster grille. It detects sunload entering through windshield by
means of a photo diode. The sensor converts the sunload into a cur-
rent value which is then input into the unified meter and A/C amp.
SUNLOAD INPUT PROCESS
The unified meter and A/C amp. also includes a processing circuit which averages the variations in detected
sunload over a period of time. This prevents drastic swings in the ATC system operation due to small or quick
variations in detected sunload.
For example, consider driving along a road bordered by an occasional group of large trees. The sunload
detected by the sunload sensor will vary whenever the trees obstruct the sunlight. The processing circuit aver-
ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily
obstructing the sunlight does not cause any change in the ATC system operation. On the other hand, shortly
after entering a long tunnel, the system will recognize the change in sunload, and the system will react accord-
ingly.
DIAGNOSIS PROCEDURE FOR SUNLOAD SENSOR
SYMPTOM: Sunload sensor circuit is open or shorted. (25 or −25 is
indicated on unified meter and A/C amp. as a result of performing
self-diagnosis STEP-2.)
1. CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND
1. Disconnect sunload sensor connector.
2. Turn ignition switch ON.
3. Check voltage between sunload sensor harness connector M87 terminal 1 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
RJIA2026E
RJIA1455E
1 – Ground : Approx. 5 V
RJIA2027E

ATC-110
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
2. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between sunload sensor harness connector M87 terminal 2 and unified meter and A/C amp. harness con-
nector M57 terminal 49.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK SUNLOAD SENSOR
1. Reconnect sunload sensor connector and unified meter and A/C amp. connector.
2. Refer to AT C - 111 , "
Sunload Sensor" .
OK or NG
OK >> 1. Replace unified meter and A/C amp.
2. Go to self-diagnosis AT C - 5 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> 1. Replace sunload sensor. 2. Go to self-diagnosis AT C - 5 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
4. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between sunload sensor harness connector M87 terminal 1 and unified meter and A/C amp. harness con-
nector M57 terminal 50.
4. Check continuity between sunload sensor harness connector M87 terminal 1 and ground.
OK or NG
OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis AT C - 5 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> Repair harness or connector. 2 – 49 : Continuity should exist.
RJIA2028E
1 – 50 : Continuity should exist.
1 – Ground : Continuity should not exist.
RJIA2029E

ATC-112
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
Intake Sensor CircuitNJS000EI
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on the heater & cooling unit assembly. It
converts temperature of air after it passes through the evaporator
into a resistance value which is then input to the unified meter and A/
C amp.
DIAGNOSIS PROCEDURE FOR INTAKE SENSOR
SYMPTOM: Intake sensor circuit is open or shorted. (24 or −24 is
indicated on unified meter and A/C amp. as a result of performing
self-diagnosis STEP-2.)
1. CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND
1. Disconnect intake sensor connector.
2. Turn ignition switch ON.
3. Check voltage between intake sensor harness connector M254 terminal 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
2. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between intake sensor harness connector M254 terminal 1 and unified meter and A/C amp. harness con-
nector M57 terminal 49.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
RJIA0928E
RJIA1458E
2 – Ground : Approx. 5 V
RJIA2031E
1 – 49 : Continuity should exist.
RJIA2032E

TROUBLE DIAGNOSIS ATC-113
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AT C
Revision: 2006 December 2006 FX35/FX45
3. CHECK INTAKE SENSOR
Refer to AT C - 11 3 , "
Intake Sensor" .
OK or NG
OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis AT C - 5 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> 1. Replace intake sensor. 2. Go to self-diagnosis AT C - 5 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
4. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between intake sensor harness connector M254 terminal 2 and unified meter and A/C amp. harness con-
nector M57 terminal 41.
4. Check continuity between intake sensor harness connector M254 terminal 2 and ground.
OK or NG
OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis AT C - 5 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> Repair harness or connector.
COMPONENT INSPECTION
Intake Sensor
After disconnecting intake sensor connector M254, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.
If NG, replace intake sensor. 2 – 41 : Continuity should exist.
2 – Ground : Continuity should not exist.
RJIA2033E
Temperature °C ( °F) Resistance k Ω
− 15 (5) 12.34
− 10 (14) 9.62
− 5 (23) 7.56
0 (32) 6.00
5 (41) 4.80
10 (50) 3.87
15 (59) 3.15
20 (68) 2.57
25 (77) 2.12
30 (86) 1.76
35 (95) 1.47
40 (104) 1.23 45 (113) 1.04
RJIA2034E

AV-6
AUDIO
Revision: 2006 December 2006 FX35/FX45
AUDIOPFP:28111
System DescriptionNKS003AI
AUDIO SYSTEM
Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times

through 15A fuse (No. 32, located in the fuse and fusible link block)

to audio unit terminal 6

to A/C and AV switch terminal 1

to display control unit terminal 1

to woofer terminal 1

to satellite radio tuner terminal 12 (With satellite radio) and

to option connector–2 for satellite radio tuner terminal 12 (Without satellite radio),

through 20A fuse [No.17, located in the fuse block (J/B)]

to BOSE speaker amp. terminal 1.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 6, located in the fuse block (J/B)]

to audio unit terminal 10

to A/C and AV switch terminal 2

to display control unit terminal 10

to satellite radio tuner terminal 16 (With satellite radio) and

to option connector–2 for satellite radio tuner terminal 11 (Without satellite radio).
Ground is supplied through the case of the audio unit.
Ground is also supplied

to BOSE speaker amp. terminal 17

to woofer terminal 2

to satellite radio tuner terminal 15 (With satellite radio) and

to option connector–2 for satellite radio receiver terminal 10 (Without satellite radio)

through body ground B203 and B210,

to A/C and AV switch terminal 5

to display control unit terminals 3,13 and

to display terminal 1

through body ground M35, M45 and M85.
Audio unit, A/C and audio controller are connected by FPC (Flexible Print Circuit).
A/C and audio controller integrates A/C switches and audio switches.
When A/C and audio controller is pressed to audio switch, it sends audio signal to audio unit. Then audio sig-
nals are supplied

through audio unit terminals 1, 2, 3, 4, 13, 14, 15, and 16

to BOSE speaker amp. terminals 23, 24, 25, 26, 27, 28, 29, and 30.
Audio signals are amplified by the BOSE speaker amp.
The amplified audio signals are supplied

through BOSE speaker amp. terminals 2, 3, 4, 9,10,11,12, 13, 14, 15, 16, 18, 19 and 20

to terminals 1 and 2 of front door speaker LH and RH

to terminals 1 and 2 of rear door speaker LH and RH

to terminals 1 and 2 of tweeter LH and RH

to terminals 1 and 2 of instrument speaker LH, RH, and CENTER, and

to terminals 7 and 8 of woofer.
When one of audio steering wheel switch is pressed to ON (With telephone system), mode ON (Without
telephone system), seek up, or volume up, resistance in steering switch circuit changes depending on which
button is pressed.

AUDIO AV-29
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Revision: 2006 December 2006 FX35/FX45
Terminals and Reference Value for Audio UnitNKS003L8
Terminal
(Wire color) Item Signal
input/
output Condition
Reference value
+– Ignition
switch Operation
2 (W) 1 (B) Audio signal front LH Output ACC Receive audio signal
4 (G) 3 (R) Audio signal front RH Output ACC Receive audio signal
5 (R/W) Ground Antenna amp. ON
signal Output ACC — Approx. 12 V
6 (W/L) Ground Battery power supply Input OFF — Battery voltage 9 — Shield — — — —
10 (LG) Ground ACC power supply Input ACC — Battery voltage 11 — Shield — — — —
12 (G/W) Ground BOSE speaker amp.
ON signal Output ACC — Approx. 12 V
14 (BR) 13 (Y) Audio signal rear LH Output ACC Receive audio signal
16 (L) 15 (P) Audio signal rear RH Output ACC Receive audio signal
21 (PU) Ground Communication signal
(AUDIO-DCU) Output ACC
Operate audio volume
switch
SKIB3609E
SKIB3609E
SKIB3609E
SKIB3609E
SKIB3606E

AV-30
AUDIO
Revision: 2006 December 2006 FX35/FX45
22 (W/L) Ground Vehicle speed signal
(2 pulse) Input ON When vehicle speed is
approx. 40 km/h (25 MPH)
23 (LG) Ground Communication signal
(DCU-AUDIO) Input ACC Operate audio volume
switch
25 — Shield — — — —
46 (B)* 45 (R)* Satellite radio audio
signal LH Input ONReceive satellite radio audio
signal
48 (G)* 47 (W)* Satellite radio audio
signal RH Input ON
Receive satellite radio audio
signal
49* — Shield — — — —
52 (L)* Ground Communication signal
REQ (SAT-AUDIO) Input ON
When setting to satellite
radio mode
53 (G)* Ground Communication signal
Rx (SAT-AUDIO) Input ON When setting to satellite
radio mode
54 (Y)* Ground Communication signal
Tx (AUDIO-SAT) Output ONWhen setting to satellite
radio mode
Te r m i n a l
(Wire color) Item Signal
input/
output Condition
Reference value
+– Ignition
switch Operation
ELF1080D
SKIB3607E
SKIB3609E
SKIB3609E
SKIB7338E
SKIB7337E
SKIB7336E

AUDIO AV-31
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Revision: 2006 December 2006 FX35/FX45
*: With satellite radio
Terminals and Reference Value for BOSE Speaker Amp.NKS003L9
Terminal
(Wire color) Item Signal
input/
output Condition
Reference value
+– Ignition
switch Operation
1 (R) Ground Battery power supply Input OFF — Battery voltage
9 (LG) 10 (B/Y) Audio signal rear door
speaker LH Output ACC Receive audio signal
11 (OR) 12 (B/P) Audio signal rear door
speaker RH Output ACC Receive audio signal
13 (L) 14 (B/W) Audio signal front door
speaker LH Output ACC Receive audio signal
15 (BR) 16 (B/R) Audio signal front door
speaker RH Output ACC Receive audio signal
17 (B) Ground Ground — ON — Approx. 0 V
18 (R/L) 2 (B) Audio signal instru-
ment speaker center Output ACC Receive audio signal
19 (W) 3 (B) Audio signal woofer Output ACC Receive audio signal
SKIB3609E
SKIB3609E
SKIB3609E
SKIB3609E
SKIB3609E
SKIB3609E

AV-32
AUDIO
Revision: 2006 December 2006 FX35/FX45
20 (G) 4 (G/W) Audio signal tweeter Output ACC Receive audio signal 22 (P) Ground Amp ON signal
(woofer) Output ACC Receive audio signal Approx. 12 V
24 (L) 23 (B/W) Audio signal rear RH Input ACC Receive audio signal
26 (B/R) 25 (BR) Audio signal rear LH Input ACC Receive audio signal
28 (LG) 27 (PU) Audio signal front RH Input ACC Receive audio signal 30 (W) 29 (B) Audio signal front LH Input ACC Receive audio signal 31 (P) Ground BOSE speaker amp.
ON signal Input ACC — Approx. 12 V
Te r m i n a l
(Wire color) Item Signal
input/
output Condition
Reference value
+– Ignition
switch Operation
SKIB3609E
SKIB3609E
SKIB3609E
SKIB3609E
SKIB3609E

AUDIO AV-33
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AV
Revision: 2006 December 2006 FX35/FX45
Terminals and Reference Value for A/C and AV SwitchNKS003LA

*1: With telephone system

*2: Without telephone system Terminal
(Wire color) Item Signal
input/
output Condition
Reference value
+– Ignition
switch Operation
1 (W/L) Ground Battery power supply Input OFF — Battery voltage 2 (LG) Ground ACC power supply Input ACC — Battery voltage
5 (B) Ground Ground — ON — Approx. 0 V
6 (PU) Ground Communication
signal (+) Input/
Output ON —
7 — Shield — — — —
8 (LG) Ground Communication
signal (–) Input/
Output ON —
12 (R/W) Ground Steering SW A Input ON Press and hold PTT
*1
switch Approx. 0 V
Press and hold MODE
*2
switch Approx. 0 V
Press and hold SEEK UP
switch Approx. 1.7 V
Press and hold VOL UP
switch Approx. 3.3 V
Except for above Approx. 5 V
13 (G/W) Ground Steering SW B Input ON Press and hold MODE
*1
switch Approx. 0 V
Press and hold POWER
*2
switch Approx. 0 V
Press and hold SEEK
DOWN switch Approx. 1.7 V
Press and hold VOL DOWN
switch Approx. 3.3 V
Except for above Approx. 5 V
14 (B/Y) Ground Steering SW ground — ON — Approx. 0 V
SKIB7378E
SKIB7379E