Nissan Cube. Instruction — part 356
EC-310
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
P050A, P050E COLD START CONTROL
P050A, P050E COLD START CONTROL
Description
INFOID:0000000009947427
ECM controls ignition timing and engine idle speed when engine is started with pre-warming up condition.
This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.
DTC Logic
INFOID:0000000009947428
DTC DETECTION LOGIC
NOTE:
If DTC P050A or P050E is displayed with other DTC, first perform the trouble diagnosis for other DTC.
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 11 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE-I
With CONSULT
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Select “DATA MONITOR” mode with CONSULT.
4.
Check the indication of “COOLAN TEMP/S”.
With GST
Follow the procedure “With CONSULT” above.
Is the value of “COOLAN TEMP/S” between 4
°
C (59
°
F) and 36
°
C (97
°
F)?
YES
>> GO TO 3.
NO-1 [If it is below 4
°
C (59
°
F)]>>Warm up the engine until the value of “COOLAN TEMP/S” reaches 4
°
C
(59
°
F) or more. Retry from step 1.
NO-2 [If it is above 36
°
C (97
°
F)]>>Cool engine down to less than 36
°
C (97
°
F). Retry from step 1.
3.
PERFORM DTC CONFIRMATION PROCEDURE-II
With CONSULT
1.
Set the select lever in N range.
2.
Start the engine and warm up in idle with the value of “COOLAN TEMP/S” between 4
°
C (59
°
F) and 40
°
C
(104
°
F) for more than 15 seconds.
3.
Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected?
YES
>> Go to
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P050A
Cold start idle air control system
performance
ECM does not control engine idle speed properly
when engine is started with pre-warming up con-
dition.
• Lack of intake air volume
• Fuel injection system
• ECM
P050E
Cold start engine exhaust temper-
ature too low
The temperature of the catalyst inlet does not
rise to the proper temperature when the engine
is started with pre-warming up condition.
P050A, P050E COLD START CONTROL
EC-311
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009947429
1.
PERFORM IDLE AIR VOLUME LEARNING
Perform
EC-20, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
Is Idle Air Volume Learning carried out successfully?
YES
>> GO TO 2.
NO
>> Follow the instruction of Idle Air Volume Learning.
2.
CHECK INTAKE SYSTEM
Check for the cause of intake air volume lacking. Refer to the following.
• Crushed intake air passage
• Intake air passage clogging
• Clogging of throttle body
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning part
3.
CHECK FUEL INJECTION SYSTEM FUNCTION
Perform DTC Confirmation Procedure for DTC P0171. Refer to
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Go to
4.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON.
2.
Erase DTC.
3.
Perform DTC Confirmation Procedure.
See
.
Is the 1st trip DTC P050A or P050E displayed again?
YES
>> GO TO 5.
NO
>> INSPECTION END
5.
REPLACE ECM
1.
Replace ECM.
2.
Go to
EC-16, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
.
>> INSPECTION END
EC-312
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
P0605 ECM
P0605 ECM
Description
INFOID:0000000009947430
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
DTC Logic
INFOID:0000000009947431
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
1.
Turn ignition switch ON.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION 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.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> GO TO 4.
4.
PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C
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.
Repeat step 2 for 32 times.
4.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
PBIA9222J
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0605
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.
P0605 ECM
EC-313
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Diagnosis Procedure
INFOID:0000000009947432
1.
INSPECTION START
1.
Turn ignition switch ON.
2.
Erase 1st trip DTC. Refer to
EC-109, "On Board Diagnosis Function"
or
.
3.
Perform DTC CONFIRMATION PROCEDURE. Refer to
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 : Special Repair Require-
.
>> INSPECTION END
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