service INFINITI FX35 2008 Service Manual

DTC P0603 ECM POWER SUPPLYEC-1005
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Diagnosis ProcedureINFOID:0000000001326863
1.CHECK ECM POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check voltage between ECM terminal 121 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors E211, M41
 20A fuse
 IPDM E/R harness connector E8
 Harness for open or short between ECM and battery
>> Repair or replace harness or connectors.
3.CHECK INTERMITTENT INCIDENT
Refer to EC-717
.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness or connectors.
4.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select “SELF-DIAG RESU LTS” mode with CONSULT-III.
3. Touch “ERASE”.
4. Perform DTC Confirmation Procedure.
See EC-1003, "
DTC Confirmation Procedure".
5. Is the 1st trip DTC P0603 displayed again?
With GST
1. Turn ignition switch ON.
2. Select “Service $04” with GST.
3. Perform DTC Confirmation Procedure.
See EC-1003, "
DTC Confirmation Procedure".
4. Is the 1st trip DTC P0603 displayed again?
Ye s o r N o
Yes >> GO TO 5.
No >> INSPECTION END
TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
121 R/W Power supply for ECM
(Back-up) [Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
Voltage: Battery voltage
MBIB0026E
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EC-1006
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DTC P0603 ECM POWER SUPPLY
5.REPLACE ECM
1. Replace ECM.
2. Perform initialization of IVIS (NATS) system and regist ration of all IVIS (NATS) ignition key IDs. Refer to
BL-187, "
ECM Re-Communicating Function".
3. Perform EC-662, "
VIN Registration".
4. Perform EC-662, "
Accelerator Pedal Released Position Learning".
5. Perform EC-663, "
Throttle Valve Closed Position Learning".
6. Perform EC-663, "
Idle Air Volume Learning".
>> INSPECTION END
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DTC P0605 ECMEC-1007
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DTC P0605 ECM
Component DescriptionINFOID:0000000001326864
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
On Board Diagnosis LogicINFOID:0000000001326865
This self-diagnosis has one or two trip detection logic.
FAIL-SAFE MODE
ECM enters fail-safe mode when the malfunction A is detected.
DTC Confirmation ProcedureINFOID:0000000001326866
Perform PROCEDURE FOR MALFUNCTION A first. If th
e 1st trip DTC cannot be confirmed, perform
PROCEDURE FOR MALFUNCTION B. If there is no malfunction on PROCEDURE FOR MALFUNCTION
B, perform PROCEDURE FOR MALFUNCTION C.
NOTE:
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.
PROCEDURE FOR MALFUNCTION A
1. Turn ignition switch ON.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to EC-1008, "
Diagnosis Procedure".
PROCEDURE FOR MALFUNCTION B
1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds, and then turn ON.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to EC-1008, "
Diagnosis Procedure".
PROCEDURE FOR MALFUNCTION C
With CONSULT-III
1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds, and then turn ON.
PBIB1164E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0605
0605 Engine control module A) ECM calculation function is malfunctioning.
ECM
B) ECM EEP-ROM system is malfunctioning.
C) ECM self shut-off function is malfunctioning.
Detected items Engine operation condition in fail-safe mode
Malfunction A  ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5
degrees) by the return spring.
 ECM deactivates ASCD operation.
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EC-1008
< SERVICE INFORMATION >[VK45DE]
DTC P0605 ECM
3. Repeat step 2 for 32 times.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to
EC-1008, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001326867
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-1007, "
DTC Confirmation Procedure".
5. Is the 1st trip DTC P0605 displayed again?
With GST
1. Turn ignition switch ON.
2. Select “Service $04” with GST.
3. Perform DTC Confirmation Procedure.
See EC-1007, "
DTC Confirmation Procedure".
4. Is the 1st trip DTC P0605 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 regist ration of all IVIS (NATS) ignition key IDs. Refer to
BL-187, "
ECM Re-Communicating Function".
3. Perform EC-662, "
VIN Registration".
4. Perform EC-662, "
Accelerator Pedal Released Position Learning".
5. Perform EC-663, "
Throttle Valve Closed Position Learning".
6. Perform EC-663, "
Idle Air Volume Learning".
>> INSPECTION END
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DTC P0643 SENSOR POWER SUPPLYEC-1009
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DTC P0643 SENSOR POWER SUPPLY
On Board Diagnosis LogicINFOID:0000000001326868
This self-diagnosis has the on
e trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM ent ers fail-safe mode and the MIL lights up.
DTC Confirmation ProcedureINFOID:0000000001326869
NOTE:
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, confirm that battery voltage is more than 10V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to EC-1011, "
Diagnosis Procedure".
DTC No.Trouble diagnosis
name DTC detecting condition Possible cause
P0643
0643 Sensor power supply
circuit short ECM detects a voltage of power source for
sensor is excessively low or high.  Harness or connectors
(APP sensor 1 circuit is shorted.)
(EVAP control system pressure sensor is
shorted.)
(Refrigerant pressure sensor circuit is short-
ed.)
(PSP sensor circuit is shorted.)
 Accelerator pedal position sensor
 EVAP control system pressure sensor
 Refrigerant pressure sensor
 Power steering pressure sensor
Engine operation condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) b y the return
spring.
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EC-1010
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DTC P0643 SENSOR POWER SUPPLY
Wiring Diagram
INFOID:0000000001326870
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
TBWM1350E
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DTC P0643 SENSOR POWER SUPPLYEC-1011
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Diagnosis ProcedureINFOID:0000000001326871
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to EC-723, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
TER- MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
48 L Sensor power supply
(EVAP control system pres-
sure sensor)
[Ignition switch: ON]
Approximately 5V
49 PU Sensor power supply
(Refrigerant pressure sen-
sor) [Ignition switch: ON]
Approximately 5V
68 SB Sensor power supply
(Power steering pressure
sensor) [Ignition switch: ON]
Approximately 5V
82 B/W Sensor ground
(APP sensor 1 / ICC steering
switch / ASCD steering
switch) [Engine is running]

Warm-up condition
 Idle speed Approximately 0V
83 G/OR Sensor ground
(APP sensor 2) [Engine is running]

Warm-up condition
 Idle speed Approximately 0V
90 L/B Sensor power supply
(APP sensor 1)
[Ignition switch: ON]
Approximately 5V
91 G Sensor power supply
(APP sensor 2) [Ignition switch: ON]
Approximately 5V
98 Y/R Accelerator pe
dal position
sensor 2 [Ignition switch: ON]
 Engine stopped
 Accelerator pedal: Fully released
0.15 - 0.60V
[Ignition switch: ON]
 Engine stopped
 Accelerator pedal: Fully depressed 1.95 - 2.40V
106 OR Accelerator pe
dal position
sensor 1 [Ignition switch: ON]
 Engine stopped
 Accelerator pedal: Fully released
0.5 - 1.0V
[Ignition switch: ON]
 Engine stopped
 Accelerator pedal: Fully depressed 3.9 - 4.7V
PBIB2195E
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EC-1012
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DTC P0643 SENSOR POWER SUPPLY
2.CHECK ACCELERATOR PEDAL POSITION
SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 6 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
3.CHECK SENSOR POWER SUPPLY CIRCUITS
Check harness for short to power and short to ground, between the following terminals.
OK or NG
OK >> GO TO 4.
NG >> Repair short to ground or short to power in harness or connectors.
4.CHECK COMPONENTS
Check the following.
 EVAP control system pressure sensor (Refer to EC-965, "
Component Inspection".)
 Refrigerant pressure sensor (Refer to ATC-69, "
Magnet Clutch Circuit".)
 Power steering pressure sensor (Refer to EC-1002, "
Component Inspection".)
OK or NG
OK >> GO TO 7.
NG >> Replace malfunctioning component.
5.CHECK APP SENSOR
Refer to EC-1109, "
Component Inspection".
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-662, "
Accelerator Pedal Released Position Learning".
PBIB1548E
Voltage: Approximately 5V
PBIB0914E
ECM terminal Sensor terminal Reference Wiring Diagram
90 APP sensor terminal 6 EC-1010
48 EVAP control system pressure sensor terminal 3 EC-962
49 Refrigerant pressure sensor terminal 1EC-1178
68 PSP sensor terminal 1 EC-999
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DTC P0643 SENSOR POWER SUPPLYEC-1013
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3. Perform
EC-663, "Throttle Valve Closed Position Learning".
4. Perform EC-663, "
Idle Air Volume Learning".
>> INSPECTION END
7.CHECK INTERMITTENT INCIDENT
Refer to EC-717
.
>> INSPECTION END
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EC-1014
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DTC P0850 PNP SWITCH
DTC P0850 PNP SWITCH
Component DescriptionINFOID:0000000001326872
When the selector lever position is P or N,
park/neutral position (PNP) switch is ON.
ECM detects the position because the conti nuity of the line (the ON signal) exists.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001326873
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001326874
DTC Confirmation ProcedureINFOID:0000000001326875
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
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.
WITH CONSULT-III
1. Turn ignition switch ON.
2. Select “P/N POSI SW” in “DATA MONITOR” mode wit h CONSULT-III. Then check the “P/N POSI SW” sig-
nal under the following conditions.
If NG, go to EC-1017, "
Diagnosis Procedure".
If OK, go to following step.
3. Start engine and warm it up to normal operating temperature.
4. Maintain the following conditions for at least 60 consecutive seconds.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-1017, "
Diagnosis Procedure".
MONITOR ITEM CONDITION SPECIFICATION
P/N POSI SW  Ignition switch: ON Selector lever: P or N ON
Selector lever: Except above OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0850
0850 Park/neutral position
switch The signal of the park/neutral position (PNP)
switch is not changed in the process of engine
starting and driving.  Harness or connectors
[The park/neutral position (PNP) switch
circuit is open or shorted.]
 Park/neutral position (PNP) switch
 Unified meter and A/C amp.
TCM
Position (Selector lever) Known-good signal
N or P position ON
Except above position OFF
ENG SPEED 1,200 - 6,375 rpm
COOLAN TEMP/S More than 70 °C (158 °F)
B/FUEL SCHDL 2.0 - 31.8 msec
VHCL SPEED SE More than 64 km/h (40 MPH)
Selector lever Suitable position
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