Infiniti FX35 / FX45. Manual — part 561
DTC P0603 ECM POWER SUPPLY
EC-1005
< SERVICE INFORMATION >
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Diagnosis Procedure
INFOID: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
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 RESULTS” 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?
Yes or No
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
EC-1006
< SERVICE INFORMATION >
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DTC P0603 ECM POWER SUPPLY
5.
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.
4.
EC-662, "Accelerator Pedal Released Position Learning"
5.
EC-663, "Throttle Valve Closed Position Learning"
6.
EC-663, "Idle Air Volume Learning"
.
>> INSPECTION END
DTC P0605 ECM
EC-1007
< SERVICE INFORMATION >
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DTC P0605 ECM
Component Description
INFOID: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 Logic
INFOID: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 Procedure
INFOID:0000000001326866
Perform PROCEDURE FOR MALFUNCTION A first. If the 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 conducted, 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.
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 Procedure
INFOID: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?
Yes or No
Yes
>> GO TO 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.
4.
EC-662, "Accelerator Pedal Released Position Learning"
5.
EC-663, "Throttle Valve Closed Position Learning"
6.
EC-663, "Idle Air Volume Learning"
.
>> INSPECTION END
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