INFINITI FX35 2008 Service Manual

POWER SUPPLY AND GROUND CIRCUITEC-141
< SERVICE INFORMATION > [VQ35DE]
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Diagnosis ProcedureINFOID:0000000001325947
1.INSPECTION START
Start engine.
Is engine running?
Ye s o r N o
Yes >> GO TO 8.
No >> GO TO 2.
2.CHECK ECM POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF and then ON.
2. Check voltage between ECM terminal 109 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
 Fuse block (J/B) connector M1
 15A fuse
 Harness for open or short between ECM and fuse
>> Repair open circuit or short ground or short power in harness or connectors.
4.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
TER- MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
1 B ECM ground [Engine is running]
 Idle speed Body ground
109 W/L Ignition switch [Ignition switch: OFF]
0V
[Ignition switch: ON] BATTERY VOLTAGE
(11 - 14V)
111 W / B ECM relay
(Self shut-off) [Engine is running]
[Ignition switch: OFF]
 For a few seconds after turning ignition
switch OFF 0 - 1.5V
[Ignition switch: OFF]
 More than a few seconds after turning igni- tion switch OFF BATTERY VOLTAGE
(11 - 14V)
11 5
11 6 B/R
B/W
ECM ground [Engine is running]
 Idle speed Body ground
11 9
120 R
R/B
Power supply for ECM
[Ignition switch: ON] BATTERY VOLTAGE
(11 - 14V)
Voltage: Battery voltage
MBIB0015E
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EC-142
< SERVICE INFORMATION >[VQ35DE]
POWER SUPPLY AND GROUND CIRCUIT
2. Loosen and retighten ground screw on the body. Refer to
EC-144, "Ground Inspection".
OK or NG
OK >> GO TO 5.
NG >> Repair or replace ground connections.
5.CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 1, 115, 116 and ground. Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors F102, M82
 Harness for open or short between ECM and ground
>> Repair open circuit or short to power in harness or connectors.
7.CHECK ECM POWER SUPPLY CIRCUIT-II
1. Reconnect ECM harness connector.
2. Turn ignition switch ON.
3. Check voltage between IPDM E/R connector E7 terminal 17 and ground with CONSULT-III or tester.
OK or NG
OK >> Go to EC-569.
NG >> GO TO 8.
8.CHECK ECM POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON and then OFF.
PBIB2625E
Continuity should exist.
Voltage: Battery voltage
PBIB1610E
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POWER SUPPLY AND GROUND CIRCUITEC-143
< SERVICE INFORMATION > [VQ35DE]
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3. Check voltage between ECM terminals 119, 120 and ground
with CONSULT-III or tester.
OK or NG
OK >> GO TO 15.
NG (Battery voltage does not exist.)>>GO TO 9.
NG (Battery voltage exists for more than a few seconds.)>>GO TO 12.
9.CHECK ECM POWER SUPPLY CIRCUIT-IV
Check voltage between ECM terminal 111 and ground with CON-
SULT-III or tester.
OK or NG
OK >> GO TO 10.
NG >> GO TO 12.
10.CHECK ECM POWER SUPPLY CIRCUIT-V
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E7.
3. Check harness continuity between ECM terminals 119, 120 and IPDM E/R terminal 18. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 15.
NG >> GO TO 11.
11 .DETECT MALFUNCTIONING PART
Check the following.
 Harness or connectors E211, M41
 Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
12.CHECK ECM POWER SUPPLY CIRCUIT-VI
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E9.
3. Check harness continuity between ECM terminal 111 and IPDM E/R terminal 46. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 14.
NG >> GO TO 13.
13.DETECT MALFUNCTIONING PART Voltage: After turning ignition switch OFF, battery
voltage will exist for a few seconds, then drop
approximately 0V.
PBIB1630E
Voltage: Battery voltage
PBIB1191E
Continuity should exist.
Continuity should exist.
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EC-144
< SERVICE INFORMATION >[VQ35DE]
POWER SUPPLY AND GROUND CIRCUIT
Check the following.
 Harness or connectors E211, M41
 Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK 20A FUSE
1. Disconnect 20 A fuse from IPDM E/R.
2. Check 20A fuse.
OK or NG
OK >> GO TO 18.
NG >> Replace 20A fuse.
15.CHECK GROUND CONNECTIONS
Loosen and retighten ground screw on the body. Refer to EC-144, "
Ground Inspection".
OK or NG
OK >> GO TO 16.
NG >> Repair or replace ground connections.
16.CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 1, 115, 116 and ground. Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 17.
NG >> Repair open circuit or short to power in harness or connectors.
17.DETECTION MALFUNCTIONING PART
Check the following.
 Harness connectors F102, M82
 Harness for open or short between ECM and ground
>> Repair open circuit or shoat to power in harness connectors.
18.CHECK INTERMITTENT INCIDENT
Refer to EC-139
.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-17
NG >> Repair open circuit or short to power in harness or connectors.
Ground InspectionINFOID:0000000001325948
Ground connections are very important to the proper oper ation of electrical and electronic circuits. Ground
connections are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can
become an unwanted resistance. This unwanted resistance can change the way a circuit works.
PBIB2625E
Continuity should exist.
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POWER SUPPLY AND GROUND CIRCUITEC-145
< SERVICE INFORMATION > [VQ35DE]
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Electronically controlled circuits are very sensitive
to proper grounding. A loose or corroded ground can drasti-
cally affect an electronically controlled circuit. A poor or corroded ground can easily affect the circuit. Even
when the ground connection looks clean, there can be a thin film of rust on the surface.
When inspecting a ground connection follow these rules:
 Remove the ground bolt or screw.
 Inspect all mating surfaces for tarnish, dirt, rust, etc.
 Clean as required to assure good contact.
 Reinstall bolt or screw securely.
 Inspect for “add-on” accessories which may be interfering with the ground circuit.
 If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the
wires are clean, securely fastened and providing a good ground path. If multiple wires are cased in one eye-
let make sure no ground wires have excess wire insulation.
For detailed ground distribution information, refer to PG-26, "
Ground Distribution".
PBIB1870E
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EC-146
< SERVICE INFORMATION >[VQ35DE]
DTC U1000, U1001 CAN COMMUNICATION LINE
DTC U1000, U1001 CAN COMMUNICATION LINE
DescriptionINFOID:0000000001325949
CAN (Controller Area Network) is a serial communication
line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication s peed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CA N communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
On Board Diagn osis LogicINFOID:0000000001325950
*1: This self-diagnosis has the one trip detection logic.
*2: The MIL will not light up for this self-diagnosis.
*3: This self-diagnosis has the one or two trip detection logic. (Models with ICC)
DTC Confirmation ProcedureINFOID:0000000001325951
1. Turn ignition switch ON and wait at least 3 seconds.
2. Check 1st tip DTC.
3. If 1st trip DTC is detected, go to EC-147, "
Diagnosis Procedure".
DTC No.Trouble diagnosis
name DTC detecting condition Possible cause
U1000*
1
1000*1
CAN communication
line  When ECM is not transmitting or receiving
CAN communication signal of OBD (emission-
related diagnosis) for 2 seconds or more.  Harness or connectors
(CAN communication line is open or
shorted)
U1001*
2 *3
1001*2 *3
 When ECM is not transmitting or receiving
CAN communication signal other than OBD
(emission-related diagnosis) for 2 seconds or
more.
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DTC U1000, U1001 CAN COMMUNICATION LINEEC-147
< SERVICE INFORMATION > [VQ35DE]
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Wiring DiagramINFOID:0000000001325952
Diagnosis ProcedureINFOID:0000000001325953
Go to
LAN-43, "CAN System Specification Chart".
TBWM1378E
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EC-148
< SERVICE INFORMATION >[VQ35DE]
DTC U1010 CAN COMMUNICATION
DTC U1010 CAN COMMUNICATION
DescriptionINFOID:0000000001325954
CAN (Controller Area Network) is a serial communication
line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication s peed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CA N communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
On Board Diagn osis LogicINFOID:0000000001325955
This self-diagnosis has the one trip detection logic.
DTC Confirmation ProcedureINFOID:0000000001325956
1. Turn ignition switch ON.
2. Check DTC.
3. If DTC is detected, go to EC-148, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001325957
1.INSPECTION START
With CONSULT-III
1. Turn ignition switch ON.
2. Select “SELF-DIAG RESULTS” mode with CONSULT-III.
3. Touch “ERASE”.
4. Perform DTC Confirmation Procedure.
See EC-148, "
DTC Confirmation Procedure".
5. Is the DTC U1010 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3. Perform DTC Confirmation Procedure.
See EC-148, "
DTC Confirmation Procedure".
4. Is the DTC U1010 displayed again?
Ye s o r N o
Ye s > > G O T O 2 .
No >> INSPECTION END
2.REPLACE ECM
1. Replace ECM.
2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs.
Refer to BL-187, "
ECM Re-Communicating Function".
3. Perform EC-84, "
VIN Registration".
4. Perform EC-85, "
Accelerator Pedal Released Position Learning".
5. Perform EC-85, "
Throttle Valve Closed Position Learning".
6. Perform EC-85, "
Idle Air Volume Learning".
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
U1010
1010 CAN communication bus When detecting error during the initial diagno-
sis of CAN controller of ECM.
ECM
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DTC P0011, P0021 IVT CONTROL
EC-149
< SERVICE INFORMATION > [VQ35DE]
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DTC P0011, P0021 IVT CONTROL
DescriptionINFOID:0000000001325958
SYSTEM DESCRIPTION
*: This signal is sent to the ECM through CAN communication line
This mechanism hydraulically controls cam phases c
ontinuously with the fixed operating angle of the intake
valve.
The ECM receives signals such as crankshaft posit ion, camshaft position, engine speed, and engine coolant
temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid
valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to
increase engine torque in low/mid speed range and output in high-speed range.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000001325959
Specification data are reference values.
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS) Engine speed and piston position
Intake valve
timing controlIntake valve timing control
solenoid valve
Camshaft position sensor (PHASE)
Engine coolant temperature sensor Engine coolant temperature
Wheel sensor Vehicle speed*
PBIB3276E
MONITOR ITEM CONDITION SPECIFICATION
INT/V TIM(B1)
INT/V TIM(B2)  Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
 No load Idle
−5° - 5 °CA
When revving engine up to 2,000 rpm
quickly Approx. 0
° - 30 °CA
INT/V SOL(B1)
INT/V SOL(B2)  Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
 No load Idle 0% - 2%
When revving engine up to 2,000 rpm
quickly
Approx. 0% - 50%
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EC-150
< SERVICE INFORMATION >[VQ35DE]
DTC P0011, P0021 IVT CONTROL
On Board Diagn osis Logic
INFOID:0000000001325960
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation ProcedureINFOID:0000000001325961
CAUTION:
Always drive at a safe speed.
NOTE:
If DTC P0011 or P0021 is displayed with DTC P0075 or P0081, first perform trouble diagnosis for DTC
P0075 or P0081. Refer to EC-168
.
 If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confir m that battery voltage is between 10V and 16V at
idle.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Maintain the following conditions for at least 6 c onsecutive seconds. Hold the accelerator pedal as steady
as possible.
4. Let engine idle for 10 seconds.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-151, "
Diagnosis Procedure".
If 1st trip DTC is not detected, go to next step.
7. Maintain the following conditions for at least 20 consecutive seconds.
DTC No. Trouble diagnosis
name Detecting condition Possible cause
P0011
0011
(Bank 1) Intake valve timing
control performance There is a gap between angle of target and
phase-control angle degree.  Crankshaft position sensor (POS)
 Camshaft position sensor (PHASE)
 Intake valve control solenoid valve
 Accumulation of debris to the signal pick-up
portion of the camshaft
 Timing chain installation
 Foreign matter caught in the oil groove for in- take valve timing control
P0021
0021
(Bank 2)
Detected items Engine operating condition in fail-safe mode
Intake valve timing control The signal is not energized to the solenoid valve and the valve control does not function.
VHCL SPEED SE 100 - 120 km/h (63 - 75 MPH)
ENG SPEED 1,200 - 2,000 rpm
COOLAN TEMP/S More than 60 °C (140 °F)
B/FUEL SCHDL More than 7.26 msec
Selector lever D position
ENG SPEED 1,700 - 3,175 rpm (A cons tant rotation is maintained.)
COOLAN TEMP/S More than 70 °C (158 °F)
Selector lever 1st or 2nd position
Driving location uphill Driving vehicle uphill
(Increased engine load will help maintain the driving
conditions required for this test.)
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