INFINITI FX35 2005 Service Manual

EC-698
[VQ35DE]
SNOW MODE SWITCH
Revision: 2005 July 2005 FX
SNOW MODE SWITCHPFP:25310
DescriptionABS00A2B
NOTE:
If DTC U1000 or U1001 are displayed, first perform the trouble diagnosis for DTC U1000, U1001.
Refer to EC-171, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
The snow mode switch signal is sent to the “unified meter and A/C amp.” from the snow mode switch. The
“unified meter and A/C amp.” then sends the signal to the ECM by CAN communication line.
The snow mode is used for driving or starting the vehicle on snowy roads or slippery areas. If the snow mode
is activated, the vehicle speed will not be accelerated immediately than your original pedal in due to avoid the
vehicle slip. In other words, ECM controls the rapid engine torque change by controlling the electric throttle
control actuator operating speed.
CONSULT-II Reference Value in the Data Monitor ModeABS00A2C
MONITOR ITEM CONDITION SPECIFICATION
SNOW MODE SW

Ignition switch: ON SNOW MODE SW: ON ON
SNOW MODE SW: OFF OFF

SNOW MODE SWITCH EC-699
[VQ35DE]
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Revision: 2005 July 2005 FX
Wiring DiagramABS00A2D
TBWM0738E

EC-700
[VQ35DE]
SNOW MODE SWITCH
Revision: 2005 July 2005 FX
Diagnostic ProcedureABS00E9B
1. CHECK SNOW MODE SWITICH OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Select “SNOW MODE SW” in “DATA MONITOR” mode with CONSULT-II.
3. Check “SNOW MODE SW” indication under the following condi- tions.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK SNOW MODE SWITICH OVERALL FUNCTION-II
1. Turn ignition switch ON.
2. Start engine.
3. Check the snow mode indicator in the snow mode switch under the following condition.
OK or NG
OK >> INSPECTION END
NG >> GO TO 7.
3. CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to DI-32, "
SELF-DIAGNOSTIC RESULTS" .
OK or NG
OK >> GO TO 4.
NG >> Go to DI-28, "
UNIFIED METER AND A/C AMP" .
4. CHECK SNOW MODE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect snow mode switch harness connector.
3. Turn ignition switch ON.
4. Check voltage between snow mode switch terminal 1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
CONDITION INDICATION
Snow mode switch: ON ON
Snow mode switch: OFF OFF
PBIB2009E
CONDITION INDICATION
Snow mode switch: ON ON
Snow mode switch: OFF OFF
Voltage: Battery voltage.
PBIB2562E

SNOW MODE SWITCH EC-701
[VQ35DE]
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Revision: 2005 July 2005 FX
5. DETECT MALFUNCTIONING PART
Check the following.

Fuse block (J/B) M1

10A fuse

Harness for open or short between snow mode switch and fuse.
>> Repair open circuit or short to ground or short to power in harness or connectors.
6. CHECK SNOW MODE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect “unified meter and A/C amp.” harness connector.
3. Check harness continuity between snow mode switch terminal 4 and “unified meter and A/C amp.” termi- nal 12. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to EC-861, "
Ground Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace ground connections.
8. CHECK SNOW MODE INDICATOR LAMP GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between snow mode switch terminal 2 and ground. Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to power in harness or connectors. Continuity should exist.
PBIB2625E
Continuity should exist.

EC-702
[VQ35DE]
SNOW MODE SWITCH
Revision: 2005 July 2005 FX
9. CHECK SNOW MODE SWITCH
Refer to EC-1392, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace snow mode switch.
10. CHECK INTERMITTENT INCIDENT
Refer to EC-854, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Component InspectionABS00A2P
SNOW MODE SWITCH
1. Check continuity between snow mode switch terminals 1 and 4
under the following conditions.
2. If NG, replace snow mode switch. If OK, go to following step.
3. Check continuity between snow mode switch terminals 2 and 4 under the following conditions.
4. If NG, replace snow mode switch.
CONDITION CONTINUITY
Snow mode switch: ON Should exist
Snow mode switch: OFF Should not exist
PBIB2563E
CONDITION CONTINUITY 1 Should exist.
2 Should not exist.
PBIB2564E

MIL AND DATA LINK CONNECTOR EC-703
[VQ35DE]
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Revision: 2005 July 2005 FX
MIL AND DATA LINK CONNECTORPFP:24814
Wiring DiagramABS006Z6
TBWM0268E

EC-704
[VQ35DE]
MIL AND DATA LINK CONNECTOR
Revision: 2005 July 2005 FX
TBWM0269E

SERVICE DATA AND SPECIFICATIONS (SDS) EC-705
[VQ35DE]
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Revision: 2005 July 2005 FX
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Fuel PressureABS006ZI
Idle Speed and Ignition TimingABS006ZJ
*1: Under the following conditions:

Air conditioner switch: OFF

Electric load: OFF (Lights, heater fan & rear window defogger)

Steering wheel: Kept in straight-ahead position
Calculated Load ValueABS006ZK
Mass Air Flow SensorABS006ZL
*: Engine is warmed up to normal operating temperature and running under no-load.
Intake Air Temperature SensorABS006ZM
Engine Coolant Temperature SensorABS006ZN
Air Fuel Ratio (A/F) Sensor 1 HeaterABS006ZO
Heated Oxygen sensor 2 HeaterABS006ZP
Crankshaft Position Sensor (POS)ABS006ZQ
Refer to EC-306, "Component Inspection" .
Camshaft Position Sensor (PHASE)ABS006ZR
Refer to EC-315, "Component Inspection" .
Throttle Control MotorABS006ZS
Fuel pressure at idling kPa (kg/cm2 , psi) Approximately 350 (3.57, 51)
Target idle speed
No-load*1 (in P or N position) 650
±50 rpm
Air conditioner: ON In P or N position 700 rpm or more
Ignition timing In P or N position 15 ° ± 5 ° BTDC
Calculated load value% (Using CONSULT-II or GST)
At idle 5 - 35
At 2,500 rpm 5 - 35
Supply voltageBattery voltage (11 - 14V)
Output voltage at idle 1.0 - 1.2*V
Mass air flow (Using CONSULT-II or GST) 2.0 - 6.0 g·m/sec at idle*
7.0 - 20.0 g·m/sec at 2,500 rpm*
Temperature °C ( °F) Resistance k Ω
25 (77) 1.94 - 2.06
80 (176) 0.295 - 0.349
Temperature °C ( °F) Resistance k Ω
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
Resistance [at 25°C (77 °F)] 2.3 - 4.3 Ω
Resistance [at 25°C (77 °F)] 5.0 - 7.0 Ω
Resistance [at 25°C (77 °F)] Approximately 1 - 15 Ω

EC-706
[VQ35DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: 2005 July 2005 FX
InjectorABS006ZT
Fuel PumpABS006ZU
Resistance [at 10 - 60°C (50 - 140 °F)] 13.5 - 17.5 Ω
Resistance [at 25°C (77 °F)] 0.2 - 5.0 Ω

INDEX FOR DTC EC-707
[VK45DE]
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Revision: 2005 July 2005 FX
[VK45DE]INDEX FOR DTCPFP:00024
DTC No. IndexABS00E3V
NOTE:
If DTC U1000 or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-862, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
DTC*1
Items
(CONSULT-II screen terms) Reference page
CONSULT-II
GST*
2ECM*3
No DTC Flashing*4NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED. EC-761
U1000
1000*5CAN COMM CIRCUIT EC-862
U1001
1001*5CAN COMM CIRCUIT EC-862
P0000 0000 NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED. —
P0011 0011 INT/V TIM CONT-B1 EC-865
P0021 0021 INT/V TIM CONT-B2 EC-865
P0031 0031 HO2S1 HTR (B1)EC-877
P0032 0032 HO2S1 HTR (B1)EC-877
P0037 0037 HO2S2 HTR (B1)EC-885
P0038 0038 HO2S2 HTR (B1)EC-885
P0051 0051 HO2S1 HTR (B2)EC-877
P0052 0052 HO2S1 HTR (B2)EC-877
P0057 0057 HO2S2 HTR (B2)EC-885
P0058 0058 HO2S2 HTR (B2)EC-885
P0101 0101 MAF SEN/CIRCUITEC-893
P0102 0102 MAF SEN/CIRCUITEC-902
P0103 0103 MAF SEN/CIRCUITEC-902
P0112 0112 IAT SEN/CIRCUITEC-909
P0113 0113 IAT SEN/CIRCUITEC-909
P0117 0117 ECT SEN/CIRCUITEC-914
P0118 0118 ECT SEN/CIRCUITEC-914
P0122 0122 TP SEN2/CIRC EC-920
P0123 0123 TP SEN2/CIRCEC-920
P0125 0125 ECT SENSOREC-927
P0127 0127 IAT SENSOREC-930
P0128 0128 THERMSTAT FNCTNEC-933
P0132 0132 HO2S1 (B1)EC-935
P0133 0133 HO2S1 (B1)EC-944
P0134 0134 HO2S1 (B1)EC-956
P0138 0138 HO2S2 (B1)EC-966
P0139 0139 HO2S2 (B1)EC-975
P0152 0152 HO2S1 (B2)EC-935
P0153 0153 HO2S1 (B2)EC-944
P0154 0154 HO2S1 (B2)EC-956