Nissan Versa Sedan. Manual — part 335
P0603 ECM POWER SUPPLY
EC-339
< DTC/CIRCUIT DIAGNOSIS >
[HR16DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0603 ECM POWER SUPPLY
Description
INFOID:0000000009267226
ECM has the memory function of the DTC memory, the air-fuel ratio
feedback compensation value memory, the Idle Air Volume Learning
value memory, etc. even when the ignition switch is turned OFF.
DTC Logic
INFOID:0000000009267227
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.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON wait at least 10 seconds.
2. Turn ignition switch OFF and wait at least 5 minutes
3. Turn ignition switch ON, wait at least 10 seconds.
4. Repeat step 2 and 3 for five times.
5. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009267228
1.
INSPECTION START
1. Erase DTC.
2. Perform DTC CONFIRMATION PROCEDURE.
.
Is the 1st trip DTC P0603 displayed again?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
REPLACE ECM
1. Replace ECM. Refer to
EC-463, "Removal and Installation"
PBIA9222J
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0603
ECM BACK UP/CIRCUIT
(ECM power supply circuit)
ECM back-up RAM system
does not function properly.
• Harness or connectors
[ECM power supply (back up) circuit is open or shorted.]
• ECM
P0605 ECM
EC-341
< DTC/CIRCUIT DIAGNOSIS >
[HR16DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0605 ECM
DTC Logic
INFOID:0000000009267229
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.
>> 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
Diagnosis Procedure
INFOID:0000000009267230
1.
INSPECTION START
1. Erase DTC.
2. Perform DTC CONFIRMATION PROCEDURE.
.
Is the 1st trip DTC P0605 displayed again?
YES
>> GO TO 2.
NO
>> INSPECTION END
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.
EC-342
< DTC/CIRCUIT DIAGNOSIS >
[HR16DE]
P0605 ECM
2.
REPLACE ECM
1. Replace ECM. Refer to
EC-463, "Removal and Installation"
2. Perform
.
>> INSPECTION END
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст