Infiniti G37 Coupe. Manual — part 544
P0605 ECM
EC-357
< COMPONENT DIAGNOSIS >
[VQ37VHR]
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:0000000001734172
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
.
With GST
1.
Turn ignition switch ON.
2.
Select Service $04 with GST.
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.
EC-16, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM) : Special Repair
.
>> INSPECTION END
EC-358
< COMPONENT DIAGNOSIS >
[VQ37VHR]
P0643 SENSOR POWER SUPPLY
P0643 SENSOR POWER SUPPLY
DTC Logic
INFOID:0000000001734173
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing 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 10V 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:0000000001734174
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 SENSOR 1 POWER SUPPLY CIRCUIT
1.
Disconnect accelerator pedal position (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 a voltage of power
source for sensor is excessively low
or high.
• Harness or connectors
(APP sensor 1 circuit is shorted.)
(TP sensor circuit is shorted.)
[CMP sensor (PHASE) (bank 1) circuit is shorted.]
[Manifold absolute pressure (MAP) sensor circuit is
shorted.]
(PSP sensor circuit is shorted.)
[CMP sensor (PHASE) (bank 2) circuit is shorted.]
[Battery current sensor circuit is shorted/]
• Accelerator pedal position sensor
• Throttle position sensor
• Camshaft position sensor (PHASE) (bank 1)
• Manifold absolute pressure (MAP) sensor
• Power steering pressure sensor
• Camshaft position sensor (PHASE) (bank 2)
• Battery current sensor
P0643 SENSOR POWER SUPPLY
EC-359
< COMPONENT DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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.
• Camshaft position sensor (PHASE) (bank 1) (Refer to
EC-271, "Component Inspection"
• Manifold absolute pressure (MAP) sensor (Refer to
EC-178, "Component Inspection"
• Power steering pressure sensor (Refer to
EC-347, "Component Inspection"
• Camshaft position sensor (PHASE) (bank 2) (Refer to
EC-271, "Component Inspection"
• Battery current sensor (Refer to
EC-410, "Component Inspection"
.)
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace malfunctioning component.
5.
CHECK TP SENSOR
EC-189, "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-189, "Special Repair Requirement"
.
>> INSPECTION END
7.
CHECK APP SENSOR
EC-460, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 9.
APP sensor
Ground
Voltage
Connector
Terminal
E112
5
Ground
Approx. 5V
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
CMP sensor (PHASE) (bank 1)
F5
1
Manifold absolute pressure (MAP) sen-
sor
F50
1
PSP sensor
F35
3
64
CMP sensor (PHASE) (bank 2)
F18
1
Battery current sensor
E21
1
M107
99
APP sensor
E112
5
EC-360
< COMPONENT DIAGNOSIS >
[VQ37VHR]
P0643 SENSOR POWER SUPPLY
NO
>> GO TO 8.
8.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1.
Replace accelerator pedal assembly.
2.
Go to
EC-460, "Special Repair Requirement"
.
>> INSPECTION END
9.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
>> INSPECTION END
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