air condition INFINITI M35 2007 Factory Service Manual

RADIATOR
CO-45
[VK45DE]
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Revision: 2007 April2007 M35/M45
INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using radiator cap tester adapter (commercial service tool) and radiator
cap tester (commercial service tool). Refer to CO-40, "
LEAK CHECK" .

Start and warm up engine. Visually Check if there is no leaks of engine coolant and A/T fluid.
Checking Radiator CapNBS004RI

Check valve seat of radiator cap.
–Check if valve seat is swollen to the extent that the edge of the
plunger cannot be seen when watching it vertically from the top.
–Check if valve seat has no soil and damage.

Pull negative-pressure valve to open it, and make sure that it
close completely when released.
–Make sure that there is no dirt or damage on the valve seat of
radiator cap negative-pressure valve.
–Make sure that there are no unusualness in the opening and
closing conditions of negative-pressure valve.

Check radiator cap relief pressure.
–When connecting radiator cap to the radiator cap tester adapter
(commercial service tool) (B) and the radiator cap tester (com-
mercial service tool) (A), apply engine coolant to the cap seal
surface.

Replace radiator cap if there is an unusualness.
CAUTION:
When installing a radiator cap, thoroughly wipe out the radiator filler neck to remove any waxy residue
or foreign material.
Checking RadiatorNBS004RJ
Check radiator for mud or clogging. If necessary, clean radiator as follows:

Be careful not to bend or damage the radiator fins.

When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radiator
shroud and horns. Then tape the harness and electrical connectors to prevent water from entering.
1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surface once per minute.
3. Stop washing if any stains no longer flow out from radiator.
4. Blow air into the back side of radiator core vertically downward.
PBIC2816E
SMA967B
Standard : 78 - 98 kPa (0.8 - 1.0 kg/cm2 , 11 - 14 psi)
Limit : 59 kPa (0.6 kg/cm
2 , 9 psi)
PBIC5122J

DI-24
COMBINATION METERS
Revision: 2007 April2007 M35/M45
4. CHECK FUEL LEVEL SENSOR (MAIN-SUB) CIRCUIT
1. Disconnect fuel level sensor unit and fuel pump (main) connec-
tor.
2. Check continuity between fuel level sensor unit (sub) harness
connector (A) and fuel level sensor unit and fuel pump (main)
harness connector (B).
3. Check continuity between fuel level sensor unit (sub) harness
connector (A) and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5. CHECK FUEL LEVEL SENSOR (MAIN) CIRCUIT
Check continuity between fuel level sensor unit and fuel pump
(main) harness connector (A) and unified meter and A/C amp. har-
ness connector (B).
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6. CHECK INSTALLATION CONDITION
Check fuel level sensor unit installation, and check whether the float arm interferes or binds with any of the
internal components in the fuel tank.
OK or NG
OK >> Replace unified meter and A/C amp.
NG >> Install the fuel level sensor unit properly.
AB
Continuity
Connector Terminal Connector Terminal
B52 2 B433 2 Yes
A
GroundContinuity
Connector Terminal
B52 2 No
PKIB7643E
AB
Continuity
Connector Terminal Connector Terminal
B4335 M6558Yes
PKIB7644E

UNIFIED METER AND A/C AMP
DI-29
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Revision: 2007 April2007 M35/M45
A/C AUTO AMP. FUNCTION
Unified meter and A/C amp. controls each operation for A/C auto amp. Regarding A/C control, refer to AT C -
29, "AIR CONDITIONER CONTROL" in ATC section.
OTHER FUNCTIONS
Drive Computer Function
The signals required for the distance to empty (DTE) display are centralized in the unified meter and A/C
amp., converted into data, and transmit to the AV control unit (without NAVI) or NAVI control unit (with NAVI)
with CAN communication.
Signal Buffer Function
Unified meter and A/C amp. transmits each signal to other units with CAN communication.

DI-32
UNIFIED METER AND A/C AMP
Revision: 2007 April2007 M35/M45
DATA MONITOR
Operation Procedure
1. Touch “METER A/C AMP” on “SELECT SYSTEM” screen.
2. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
3. Touch either “MAIN SIGNALS” or “SELECTION FROM MENU” on the “DATA MONITOR” screen.
4. When “SELECTION FROM MENU” is selected, touch individual items to be monitored. When “MAIN SIG-
NALS” is selected, main items will be monitored.
5. Touch “START”.
6. Touch “RECORD” while monitoring, then the status of the moni-
tored item can be recorded. To stop recording, touch “STOP”.
Display Item List
X: Applicable MAIN SIGNALS Monitors main signals.
SELECTION FROM MENU Selects and monitors individual signal.
SKIA4957E
Display item [Unit]MAIN
SIGNALSSELECTION
FROM MENUDescription
SPEED METER [km/h] or [mph] X XDisplays the value of vehicle speed signal, which is input from ABS
actuator and electric unit (control unit).
SPEED OUTPUT [km/h] or [mph] X XDisplays the value of vehicle speed signal, which is transmitted to
each unit with CAN communication.
TACHO METER [rpm] X X Displays the value of engine speed signal, which is input from ECM.
W TEMP METER [°C] or [°F] X XDisplays the value of engine coolant temperature signal, which is
input from ECM.
FUEL METER [lit.] X XDisplays the value, which processes a resistance signal from fuel
gauge.
DISTANCE [km] or [mile] X XDisplays the value, which is calculated by vehicle speed signal from
ABS actuator and electric unit (control unit), fuel gauge and fuel
consumption from ECM.
FUEL W/L [ON/OFF] X X Displays [ON/OFF] condition of low-fuel warning lamp.
MIL [ON/OFF] X Displays [ON/OFF] condition of malfunction indicator lamp.
AIR PRES W/L [ON/OFF] X Displays [ON/OFF] condition of low tire pressure warning lamp.
SEAT BELT W/L [ON/OFF] X Displays [ON/OFF] condition of seat belt warning lamp.
BUZZER [ON/OFF] X X Displays [ON/OFF] condition of buzzer.
DOOR W/L [ON/OFF] X Displays [ON/OFF] condition of door warning lamp.
HI-BEAM IND [ON/OFF] X Displays [ON/OFF] condition of high beam indicator.
TURN IND [ON/OFF] X Displays [ON/OFF] condition of turn indicator.
FR FOG IND [ON/OFF] X Displays [ON/OFF] condition of front fog indicator.
OIL W/L [ON/OFF] X Displays [ON/OFF] condition of oil pressure warning lamp.
VDC/TCS IND [ON/OFF] X Displays [ON/OFF] condition of VDC/TCS OFF indicator lamp.
ABS W/L [ON/OFF] X Displays [ON/OFF] condition of ABS warning lamp.
SLIP IND [ON/OFF] X Displays [ON/OFF] condition of SLIP indicator lamp.
BRAKE W/L [ON/OFF] X Displays [ON/OFF] condition of brake warning lamp. *

DI-54
WARNING LAMPS
Revision: 2007 April2007 M35/M45
4. CHECK OIL PRESSURE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R harness connector and
ground.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-31, "Removal and
Installation of IPDM E/R" .
NG >> Repair harness or connector.
5. CHECK IPDM E/R (CONSULT-II)
Perform self-diagnosis of IPDM E/R. Refer to PG-20, "
CONSULT-II Function (IPDM E/R)" .
Self
-diagnostic results content
No malfunction detected>> Replace combination meter.
Malfunction detected>> Check applicable parts, and repair or replace corresponding parts.
Electrical Component InspectionNKS003UU
OIL PRESSURE SWITCH
Check continuity between oil pressure switch and ground.
IPDM E/R connector Terminal
GroundContinuity
E9 52 No
PKIB7659E
Condition
Oil pressure [kPa (kg/cm2 , psi)]Continuity
Engine stopped Less than 29 (0.3, 4) Yes
Engine running More than 29 (0.3, 4) No
ELF0044D

DI-72
WARNING CHIME
Revision: 2007 April2007 M35/M45
Front Door Switch (Driver Side) Signal InspectionNKS003VA
1. CHECK BCM INPUT SIGNAL
With CONSULT-ll
1. Select “BCM” on CONSULT-II.
2. With “DATA MONITOR” of “BUZZER”, confirm “DOOR SW-DR”
when the driver side door is opened/closed.
Without CONSULT-ll
Check voltage between BCM harness connector and ground.
OK or NG
OK >> Front door switch (driver side) signal is OK. Return to
DI-70, "
SYMPTOM CHART" .
NG >> GO TO 2.
2. CHECK FRONT DOOR SWITCH (DRIVER SIDE) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front door switch (driver side)
connector.
3. Check continuity between BCM harness connector (A) and front
door switch (driver side) harness connector (B).
4. Check continuity between BCM harness connector (A) and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK FRONT DOOR SWITCH (DRIVER SIDE)
Check front door switch (driver side). Refer to DI-74, "
FRONT DOOR SWITCH (DRIVER SIDE)" .
OK or NG
OK >> Replace BCM. Refer to BCS-15, "Removal and Installation of BCM" .
NG >> Replace front door switch (driver side).“DOOR SW-DR”
When driver side door is opened : ON
When driver side door is closed : OFF
SEL502W
Te r m i n a l s
Condition
Voltage
(Approx.) (+)
(–)
BCM
connectorTerminal Driver side door:
M3 62 GroundOpen 0 V
Close 12 V
PKIB7662E
AB
Continuity
Connector Terminal Connector Terminal
M3 62 B11 2 Yes
A
GroundContinuity
Connector Terminal
M3 62 No
PKIB7663E

WARNING CHIME
DI-73
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Revision: 2007 April2007 M35/M45
Seat Belt Buckle Switch Signal InspectionNKS003VB
1. CHECK BCM INPUT SIGNAL
1. Select “BCM” on CONSULT-II.
2. With “DATA MONITOR” of “BUZZER”, confirm “BUCKLE SW”
when the seat belt is fastened/unfastened.
OK or NG
OK >> Seat belt buckle switch signal is OK. Return to DI-70,
"SYMPTOM CHART" .
NG >> GO TO 2.
2. CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between unified meter and A/C amp. harness
connector and ground.
OK or NG
OK >> Replace unified meter and A/C amp.
NG >> GO TO 3.
3. CHECK SEAT BELT BUCKLE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector and seat belt
buckle switch (driver side) connector.
3. Check continuity between unified meter and A/C amp. harness
connector (A) and seat belt buckle switch (driver side) harness
connector (B).
4. Check harness continuity between unified meter and A/C amp.
harness connector (A) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.“BUCKLE SW”
When seat belt is fastened : OFF
When seat belt is unfastened : ON
SKIA8674E
Terminals
Condition
Voltage
(Approx.) (+)
(–)
Unified meter and
A/C amp. connectorTerminalSeat belt
(driver side):
M64 9 GroundFasten 12 V
Unfasten 0 V
PKIB7664E
AB
Continuity
Connector Terminal Connector Terminal
M64 9 B203 1 Yes
A
GroundContinuity
Connector Terminal
M64 9 No
PKIB7666E

DI-92
LANE DEPARTURE WARNING SYSTEM
Revision: 2007 April2007 M35/M45
Trouble DiagnosisNKS003VN
HOW TO PERFORM TROUBLE DIAGNOSIS
1. Check the symptom and customer complaint.
2. Understand the outline of system. Refer to DI-75, "
System Description" .
3. Perform the preliminary inspection. Refer to DI-92, "
PRELIMINARY INSPECTION" .
4. Referring to symptom chart, make sure the cause of the malfunction and repair or replace applicable
parts. Refer to DI-93, "
SYMPTOM CHART" .
5. Erase DTC and perform self-diagnosis of LDW system again. Then perform LDW system running test.
Refer to DI-88, "
CONSULT-II Function (LDW)" and DI-77, "LDW SYSTEM RUNNING TEST" .
6. Does LDW system operate normally? If yes, GO TO 7. If no, GO TO 3.
7. INSPECTION END
PRELIMINARY INSPECTION
1. CHECK CAMERA LENS AND WINDSHIELD
Are camera lens and windshield contaminated with foreign materials?
YES >> Clean camera lens and windshield.
NO >> GO TO 2.
2. CHECK CAMERA UNIT INSTALLATION CONDITION
Check camera unit installation condition (installation position, properly tightened, a bent bracket).
OK or NG
OK >> GO TO 3.
NG >> Install camera unit properly, and adjust camera aiming. Refer to DI-78, "
Camera Aiming Adjust-
ment" .
3. CHECK VEHICLE HEIGHT
Check vehicle height. Refer to FSU-19, "
SERVICE DATA AND SPECIFICATIONS (SDS)" (2WD) or FSU-37,
"SERVICE DATA AND SPECIFICATIONS (SDS)" (AWD).
Is vehicle height appropriate?
OK >> GO TO 4.
NG >> Repair vehicle to appropriate height.
4. CHECK LDW CAMERA UNIT (CONSULT-II)
Perform self-diagnosis of LDW camera unit. Refer to DI-88, "
CONSULT-II Function (LDW)" .
Self
-diagnostic results content
No malfunction detected>>GO TO 5.
Malfunction detected>>Check applicable parts, and repair or replace corresponding parts.
5. CHECK COMBINATION METER
Check combination meter function.
Do speedometer and turn signal indicator function normally?
YES >> INSPECTION END
NO >> Check combination meter. Refer to DI-18, "
Trouble Diagnosis" .

DI-96
LANE DEPARTURE WARNING SYSTEM
Revision: 2007 April2007 M35/M45
4. CHECK LDW CHIME SIGNAL CIRCUIT
1. Disconnect LDW camera unit connector.
2. Check continuity between LDW camera unit harness connector
(A) and LDW chime harness connector (B).
3. Check continuity between LDW camera unit harness connector
(A) and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5. CHECK LDW CHIME
1. Connect LDW chime connector.
2. Turn ignition switch ON.
3. Apply ground to LDW chime terminal.
4. Check condition of the LDW chime.
OK or NG
OK >> Replace LDW camera unit.
NG >> Replace LDW chime.
LDW Switch Circuit InspectionNKS003VW
1. CHECK OPERATION OF LDW SYSTEM ON INDICATOR
1. Turn ignition switch ON.
2. Check LDW system ON indicator operation when LDW switch is ON/OFF.
OK or NG
OK >> LDW system ON indicator is OK. Return to DI-93, "SYMPTOM CHART" .
NG >> GO TO 2.
2. CHECK LDW SWITCH SIGNAL INPUT
Check voltage between LDW camera unit harness connector and
ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 3.
AB
Continuity
Connector Terminal Connector Terminal
M182 3 M58 2 Yes
A
GroundContinuity
Connector Terminal
M182 3 No
PKIC0250E
LDW chime connector Terminal
GroundCondition
M58 2 LDW chime should operate.
PKIC0251E
Terminals
Condition
Voltage (Approx.) (+)
(–)
LDW camera
unit connectorTerminal LDW switch:
M182 9 GroundPush 0 V
Release 5 V
PKIC0252E

DI-98
LANE DEPARTURE WARNING SYSTEM
Revision: 2007 April2007 M35/M45
7. CHECK LDW SYSTEM ON INDICATOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect LDW switch connector.
3. Turn ignition switch ON.
4. Check voltage between LDW switch harness connector and
ground.
OK or NG
OK >> GO TO 8.
NG >> Check harness between fuse and LDW switch.
8. CHECK LDW SYSTEM ON INDICATOR SIGNAL CIRCUIT
1. Disconnect LDW camera unit connector.
2. Check continuity between LDW camera unit harness connector
(A) and LDW switch harness connector (B).
3. Check continuity between LDW camera unit harness connector
(A) and ground.
OK or NG
OK >> GO TO 9.
NG >> Repair harness or connector.
9. CHECK LDW SYSTEM ON INDICATOR
1. Connect LDW switch connector.
2. Turn ignition switch ON.
3. Apply ground to LDW switch terminal.
4. Check condition of the LDW system ON indicator.
OK or NG
OK >> Replace LDW camera unit.
NG >> Replace LDW switch.
Terminals
Voltage (Approx.) (+)
(–)
LDW chime connector Terminal
M49 3 Ground Battery voltage
PKIC0255E
AB
Continuity
Connector Terminal Connector Terminal
M1824 M492 Yes
A
GroundContinuity
Connector Terminal
M182 4 No
PKIC0256E
LDW switch
connectorTerminal
GroundCondition
M49 2 LDW system ON indicator
should illuminate.
PKIC0257E