2008 INFINITI FX35 battery

TROUBLE DIAGNOSISATC-81
< SERVICE INFORMATION >
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DIAGNOSIS PROCEDURE FOR INSUFFICIENT COOLING
SYMPTOM: Insufficient cooling
1.CHECK POWER SUPPLY FOR ECV (ELECTRONIC CONTROL VALVE)
1. Disconnect compressor (ECV) connector.
2. Turn ignition switch ON.
3. Check voltage between compressor (ECV) harness connector F6 terminal 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> Check power supply circuit and 10A fuse [No. 12, located in the fuse block (J/B)]. Refer to PG-77
.
 If fuse is OK, check harness for open circuit. Repair or replace if necessary.
 If fuse is NG, check harness for short circuit and replace fuse.
2.CHECK ECV CONTROL SIGNAL
1. Turn ignition switch OFF.
2. Reconnect compressor (ECV) connector.
3. Perform self-diagnosis. Refer to ATC-43, "
Self-Diagnosis Function".
4. Set in self-diagnosis STEP-4 (Code No. 45). Refer to ATC-43, "
Self-Diagnosis Function".
5. Confirm ECV control signal between unified meter and A/C amp. harness connector M57 terminal 45 and ground using an oscillo-
scope.
Gauge indication Refrigerant cycle Probable cause Corrective action
Low-pressure side becomes nega-
tive. Liquid tank or front/rear side of
expansion valve’s pipe is frost-
ed or wet with dew.High-pressure side is closed
and refrigerant does not flow.
↓
Expansion valve or liquid tank
is frosted.Leave the system at rest until
no frost is present. Start it
again to check whether or not
the malfunction is caused by
water or foreign particles.
 If water is the cause, initially
cooling is okay. Then the wa-
ter freezes causing a block-
age. Drain water from
refrigerant or replace refrig-
erant.
 If due to foreign particles, re-
move expansion valve and
remove the particles with dry
and compressed air (not
shop air).
 If either of the above meth- ods cannot correct the mal-
function, replace expansion
valve.
 Replace liquid tank.
 Check lubricant for contami-
nation.
AC362A
2 – ground : Battery voltage
RJIA2294E
RJIA2295E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

ATC-114
< SERVICE INFORMATION >
AIR MIX DOOR MOTOR
AIR MIX DOOR MOTOR
Removal and InstallationINFOID:0000000001328214
REMOVAL
Driver Side
1. Set the temperature control switch (driver side) at 18°C (60 °F), and then disconnect the battery cable from
the negative terminal.
2. Remove instrument driver lower panel. Refer to IP-10
.
3. Remove mounting screws, and then remove air mix door motor.
4. Disconnect air mix door motor connector.
Passenger Side
1. Set the temperature control switch (passenger side) at 18 °C (60 °F), and then disconnect the battery cable
from the negative terminal.
2. Remove blower unit. Refer to ATC-103
.
3. Remove mounting screws, and then remove air mix door motor.
4. Disconnect air mix door motor connector.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA0956E
RJIA0955E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

REFRIGERANT LINESATC-133
< SERVICE INFORMATION >
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7. Disconnect one-touch joint between high-pressure pipe 2 and 3.
a. Set a disconnector (SST: 9253089908) on A/C piping.
b. Slide a disconnector toward vehicle front until it clicks.
c. Slide A/C piping toward vehicle front and disconnect it.
8. Remove high-pressure pipe 2. CAUTION:
Cap or wrap the joint of hi gh-pressure pipe 2 and 3 with
suitable material such as vinyl tape to avoid the entry of air.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:
 Replace O-rings of high-pressure pipe 1 and 2 wit h new ones, and then apply compressor oil to it
when installing it.
 Female-side piping c onnection is thin and easy to deform. Slowly insert the male-side piping
straight in axial direction.
 Insert piping securely until a click is heard.
 After piping connection is comple ted, pull male-side piping by hand to make sure that connection
does not come loose.
 When recharging refrigerant, check for leaks.
Removal and Installation of Low-Pressu re Pipe 2 and High-pressure Pipe 3
INFOID:0000000001328225
REMOVAL
1. Set the temperature (passenger side) at 18 °C (60 °F), and then disconnect the battery cable from the neg-
ative terminal.
2. Use a refrigerant collecting equipment (f or HFC-134a) to discharge the refrigerant.
3. Remove cowl top cover. Refer to EI-23
.
4. Remove low-pressure pipe 1 bracket and low-pressure flexible hose bracket mounting bolts.
5. Remove high-pressure pipe 1 from vehicle clips.
RJIA2073E
RJIA2068E
RJIA2070E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

AV-28
< SERVICE INFORMATION >
AUDIO
Terminal and Reference Value for Audio Unit
INFOID:0000000001328678
Te r m i n a l
(Wire color) ItemSignal
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 — S h i e l d — — — —
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 ACCOperate audio volume
switch
SKIB3609E
SKIB3609E
SKIB3609E
SKIB3609E
SKIB3606E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

AV-30
< SERVICE INFORMATION >
AUDIO
*: With satellite radio
Terminal and Reference Value for BOSE Speaker AmpINFOID:0000000001328679
53 (G)* GroundCommunication signal
Rx (SAT-AUDIO) Input ONWhen setting to satellite ra-
dio mode
54 (Y)* Ground Communication signal
Tx (AUDIO-SAT)
Output ONWhen setting to satellite ra-
dio mode
Te r m i n a l
(Wire color) ItemSignal
input/
output Condition
Reference value
+– Ignition
switch Operation
SKIB7337E
SKIB7336E
Te r m i n a l
(Wire color) ItemSignal
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
SKIB3609E
SKIB3609E
SKIB3609E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

AV-32
< SERVICE INFORMATION >
AUDIO
Terminal and Reference Va lue for A/C and AV Switch
INFOID:0000000001328680
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 signal31 (P) Ground BOSE speaker amp.
ON signal Input ACC — Approx. 12 V
Te r m i n a l
(Wire color) ItemSignal
input/
output Condition
Reference value
+– Ignition
switch Operation
SKIB3609E
SKIB3609E
Te r m i n a l
(Wire color) ItemSignal
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 —
SKIB7378E
SKIB7379E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

AUDIOAV-33
< SERVICE INFORMATION >
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 *1: With telephone system
 *2: Without telephone system
Terminal and Reference Value for WooferINFOID:0000000001328681
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 Te r m i n a l
(Wire color) ItemSignal
input/
output Condition
Reference value
+– Ignition
switch Operation
Te r m i n a l
(Wire color) ItemSignal
input/
output Condition
Voltag e
+– Ignition
switch Operation
1 (G/R) Ground Battery power supply Input OFF — Battery voltage 2 (B) Ground Ground — ON — Approx. 0 V
5 (P) Ground Amp ON signal Input ACC — Approx. 12 V
7 (W) 8 (B) Audio signal woofer Input ACC Receive audio signal
SKIB3609E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

AV-34
< SERVICE INFORMATION >
AUDIO
Terminal and Reference Valu e for Satellite Radio Tuner
INFOID:0000000001328682
A/C and AV Switch Self-Diagnosis FunctionINFOID:0000000001328683
It can check ON/OFF operation of each switch in the A/C and AV sw itch and diagnose the input signals to the
audio steering wheel switch.
Te r m i n a l
(Wire color) ItemSignal
input/
output Condition
Reference value
+– Ignition
switch Operation
2 (B) 1 (R) Satellite radio audio
signal LH
Output ONReceive satellite radio audio
signal
4 (G) 3 (W) Satellite radio audio
signal RH Output ONReceive satellite radio audio
signal
5—Shield —— — —
6—Shield —— — —
8 (L) Ground Communication signal
REQ (SAT-AUDIO)
Output ONWhen setting to satellite ra-
dio mode
9 (L/R) Ground Communication signal
Tx (SAT-AUDIO) Output ONWhen setting to satellite ra-
dio mode
10 (L/W) Ground Communication signal
Rx (AUDIO-SAT) Input ON
When setting to satellite ra-
dio mode
12 (Y) Ground Battery power supply Input OFF — Battery voltage
15 (B) Ground Ground — ON — Approx. 0 V
16 (P) Ground ACC power supply Input ACC — Battery voltage
17 — Satellite radio antenna — — — —
SKIB3609E
SKIB3609E
SKIB7338E
SKIB7337E
SKIB7336E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C