Nissan Xterra. Instruction — part 309
EC-362
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0603 ECM POWER SUPPLY
>> Repair open circuit in harness or connectors.
3.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness or connectors.
4.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn ignition switch ON.
2. Select “SELF DIAG RESULTS” mode with CONSULT.
3. Touch “ERASE”.
4. Perform DTC Confirmation Procedure.
EC-361, "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.
EC-361, "DTC Confirmation Procedure"
4. Is the 1st trip DTC P0603 displayed again?
Yes or No
Yes
>> GO TO 5.
No
>> INSPECTION END
5.
REPLACE ECM
CAUTION:
Perform Additional Service When Replacing ECM. Refer to
EC-122, "Additional Service When Replac-
Replace ECM.
>> INSPECTION END
P0605 ECM
EC-363
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0605 ECM
Component Description
INFOID:0000000009484082
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:0000000009484083
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:0000000009484084
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 perform the following before conduct-
ing the next step.
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.
PROCEDURE FOR MALFUNCTION A
1. Turn ignition switch ON.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to
PROCEDURE FOR MALFUNCTION B
With CONSULT
1. Turn ignition switch ON and wait at least 1 second.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to
PROCEDURE FOR MALFUNCTION C
With CONSULT
1. Turn ignition switch ON and wait at least 1 second.
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-364
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0605 ECM
2. Turn ignition switch OFF, wait at least 10 seconds, and then turn it ON.
3. Repeat step 2 for 32 times.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000009484085
1.
INSPECTION START
With CONSULT
1. Turn ignition switch ON.
2. Select “SELF DIAG RESULTS” mode with CONSULT.
3. Touch “ERASE”.
4. Perform DTC Confirmation Procedure.
EC-363, "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.
EC-363, "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
CAUTION:
Perform Additional Service When Replacing ECM. Refer to
EC-122, "Additional Service When Replac-
Replace ECM.
>> INSPECTION END
P0607 ECM
EC-365
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0607 ECM
Description
INFOID:0000000009484086
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.
On Board Diagnosis Logic
INFOID:0000000009484087
This self-diagnosis has the one trip detection logic.
DTC Confirmation Procedure
INFOID:0000000009484088
1. Turn ignition switch ON.
2. Check DTC.
3. If DTC is detected, go to
.
Diagnosis Procedure
INFOID:0000000009484089
1.
INSPECTION START
With CONSULT
1. Turn ignition switch ON.
2. Select “SELF-DIAG RESULTS” mode with CONSULT.
3. Touch “ERASE”.
4. Perform DTC Confirmation Procedure.
EC-365, "DTC Confirmation Procedure"
5. Is the DTC P0607 displayed again?
With GST
1. Turn ignition switch ON.
2. Select “Service $04” with GST.
3. Perform DTC Confirmation Procedure.
EC-365, "DTC Confirmation Procedure"
4. Is the DTC P0607 displayed again?
Yes or No
Yes
>> GO TO 2.
No
>> INSPECTION END
2.
REPLACE ECM
CAUTION:
Perform Additional Service When Replacing ECM. Refer to
EC-122, "Additional Service When Replac-
.
Replace ECM.
>> INSPECTION END
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0607
0607
CAN communication bus
When detecting error during the initial diagno-
sis of CAN controller of ECM.
• ECM
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