Infiniti FX35, FX50 (S51). Manual — part 704
P0605 ECM
EC-357
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005236946
1.
INSPECTION START
1.
Turn ignition switch ON.
2.
Erase DTC.
3.
Perform DTC Confirmation Procedure.
See
.
Is the 1st trip DTC P0605 displayed again?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
REPLACE ECM
1.
Replace ECM.
2.
Go to
EC-23, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
.
>> INSPECTION END
EC-358
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
P0607 ECM
P0607 ECM
Description
INFOID:0000000005236947
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 speed 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 CAN 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.
DTC Logic
INFOID:0000000005236948
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON.
2.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005236949
1.
INSPECTION START
1.
Turn ignition switch ON.
2.
Erase DTC.
3.
Perform DTC Confirmation Procedure.
See
4.
Check DTC.
Is the DTC P0607 displayed again?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
REPLACE ECM
1.
Replace ECM.
2.
Go to
EC-23, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
>> INSPECTION END
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0607
CAN communication bus
When detecting error during the initial diagno-
sis of CAN controller of ECM.
• ECM
P0643 SENSOR POWER SUPPLY
EC-359
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0643 SENSOR POWER SUPPLY
DTC Logic
INFOID:0000000005236950
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and let it idle for 1 second.
2.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005236951
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection M95. Refer to Ground Inspection in
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK ACCELERATOR PEDAL POSITION (APP) SENSOR 1 POWER SUPPLY CIRCUIT
1.
Disconnect APP sensor harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between APP sensor harness connector and ground.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P0643
Sensor power supply
circuit short
ECM detects that the voltage of
power source for sensor is exces-
sively low or high.
• Harness or connectors
[Accelerator pedal position (APP) sensor 1 circuit is
shorted.]
[Throttle position (TP) sensor circuit is shorted.]
[Camshaft position (CMP) sensor (bank 1) circuit is
shorted.]
[Exhaust valve timing (EVT) control position sensor
(bank 1) circuit is shorted.]
[Power steering pressure (PSP) sensor circuit is short-
ed.]
• APP sensor
• TP sensor
• CMP sensor (bank 1)
• EVT control position sensor (bank 1)
• PSP sensor
EC-360
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
P0643 SENSOR POWER SUPPLY
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 3.
3.
CHECK SENSOR POWER SUPPLY CIRCUITS
Check harness for short to power and short to ground, between the following terminals.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair short to ground or short to power in harness or connectors.
4.
CHECK COMPONENTS
Check the following.
• CMP sensor (bank 1) (Refer to
EC-277, "Component Inspection"
.)
• EVT control position sensor (bank 1) (Refer to
EC-369, "Component Inspection"
• PSP sensor (Refer to
EC-352, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace malfunctioning component.
5.
CHECK THROTTLE POSITION (TP) SENSOR
EC-191, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 6.
6.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace electric throttle control actuator.
2.
Go to
EC-191, "Special Repair Requirement"
.
>> INSPECTION END
7.
CHECK APP SENSOR
EC-444, "Component Inspection"
APP sensor
Ground
Voltage (V)
Connector
Terminal
E112
(Without ICC)
5
Ground
Approx. 5
E116
(With ICC)
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
F101
43
Electric throttle control actuator (bank 2)
F27
1
44
Electric throttle control actuator (bank 1)
F6
6
F102
60
Camshaft position (CMP) sensor (bank
1)
F5
1
Exhaust valve timing (EVT) control posi-
tion sensor (bank 1)
F4
1
Power steering pressure (PSP) sensor
F35
3
M107
99
APP sensor
E112
(Without ICC)
5
E116
(With ICC)
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