Nissan Frontier. Manual — part 444
P0605 ECM
EC-347
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
C
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EC
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P0605 ECM
Component Description
INFOID:0000000009481024
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:0000000009481025
This self-diagnosis has one or two trip detection logic.
FAIL-SAFE MODE
ECM enters fail-safe mode when malfunction A is detected.
DTC Confirmation Procedure
INFOID:0000000009481026
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
With CONSULT
1. Turn ignition switch ON.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to
With GST
Follow the procedure “With CONSULT” above.
PROCEDURE FOR MALFUNCTION B
With CONSULT
1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to
PBIA9222J
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-348
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P0605 ECM
With GST
Follow the procedure “With CONSULT” above.
PROCEDURE FOR MALFUNCTION C
With CONSULT
1. Turn ignition switch ON and wait at least 1 second.
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
With GST
Follow the procedure “With CONSULT” above.
Diagnosis Procedure
INFOID:0000000009481027
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-347, "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-347, "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 PROCEDURE AFTER REPLACING ECM. Refer to
EC-121, "Procedure After Replacing ECM"
.
Replace ECM.
>> INSPECTION END
P0607 ECM
EC-349
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0607 ECM
Description
INFOID:0000000009481028
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:0000000009481029
This self-diagnosis has the one trip detection logic (A/T models).
The MIL will not light up for this diagnosis (M/T models).
DTC Confirmation Procedure
INFOID:0000000009481030
WITH CONSULT
1. Turn ignition switch ON.
2. Check 1st trip.
3. If 1st trip DTC is detected, go to
WITH GST
Follow the procedure “WITH CONSULT” above.
Diagnosis Procedure
INFOID:0000000009481031
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-349, "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-349, "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 PROCEDURE AFTER REPLACING ECM. Refer to
EC-121, "Procedure After Replacing ECM"
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 for CAN controller of each control unit.
• ECM
EC-350
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P0643 SENSOR POWER SUPPLY
P0643 SENSOR POWER SUPPLY
On Board Diagnosis Logic
INFOID:0000000009481032
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
INFOID:0000000009481033
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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8V at idle.
WITH CONSULT
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to
.
WITH GST
Follow the procedure “WITH CONSULT” above.
Diagnosis Procedure
INFOID:0000000009481034
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body. Refer to
.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0643
0643
Sensor power supply circuit
short
ECM detects that the voltage of power
source for sensor is excessively low or
high.
• Harness or connectors
(Accelerator pedal position sensor 1 circuit is
shorted.)
(Battery current sensor circuit is shorted.)
(Camshaft position sensor circuit is shorted.)
(Power steering pressure sensor circuit is
shorted.)
(Throttle position sensor circuit is shorted.)
• Accelerator pedal position sensor (Accelerator
pedal position sensor 1)
• Battery current sensor
• Camshaft position sensor
• Power steering pressure sensor
• Throttle position sensor
Engine operation condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return
spring.
BBIA0614E
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