Nissan Titan A60. Manual — part 419
EC-342
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0605 ECM
P0605 ECM
Component Description
INFOID:0000000006158785
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:0000000006158786
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:0000000006158787
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
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
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.
5. If 1st trip DTC is detected, go to
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.
P0605 ECM
EC-343
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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Diagnosis Procedure
INFOID:0000000006158788
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.
EC-342, "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-342, "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 NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. Refer to
SEC-7, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"
.
3. Perform
.
4. Perform
EC-119, "Accelerator Pedal Released Position Learning"
.
5. Perform
EC-119, "Throttle Valve Closed Position Learning"
6. <Flexible Fuel Vehicle>
Perform
EC-119, "Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle)"
.
7. Perform
EC-120, "Idle Air Volume Learning"
.
>> INSPECTION END
EC-344
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0607 ECM
P0607 ECM
Description
INFOID:0000000006158789
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:0000000006158790
This self-diagnosis has the one trip detection logic.
DTC Confirmation Procedure
INFOID:0000000006158791
1. Turn ignition switch ON.
2. Check DTC.
3. If DTC is detected, go to
.
Diagnosis Procedure
INFOID:0000000006158792
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.
EC-344, "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-344, "DTC Confirmation Procedure"
4. Is the DTC P0607 displayed again?
Yes or No
Yes
>> GO TO 2.
No
>> INSPECTION END
2.
REPLACE ECM
1. Replace ECM.
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
SEC-7, "ECM RE-COMMUNICATING FUNCTION : Description"
.
3. Perform
.
4. Perform
EC-119, "Accelerator Pedal Released Position Learning"
.
5. Perform
EC-119, "Throttle Valve Closed Position Learning"
6. <Flexible Fuel Vehicle>
EC-119, "Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle)"
.
7. Perform
EC-120, "Idle Air Volume Learning"
.
>> 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
P0643 SENSOR POWER SUPPLY
EC-345
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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P0643 SENSOR POWER SUPPLY
On Board Diagnosis Logic
INFOID:0000000006158793
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
INFOID:0000000006158794
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1. Turn ignition swich OFF and wait at least 10 seconds.
2. Turn ignition swich ON.
3. Turn ignition swich OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to
.
Diagnosis Procedure
INFOID:0000000006158795
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
OK or NG
OK
>> GO TO 2.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0643
0643
Sensor power supply circuit
short
ECM detects a voltage of power source
for sensor is excessively low or high.
• Harness or connectors
(APP sensor 1 circuit is shorted.)
(PSP sensor circuit is shorted.)
(Battery current sensor circuit is shorted.)
(Refrigerant pressure sensor circuit is short-
ed.)
(EVAP control system pressure sensor circuit
is shorted.)
• Accelerator pedal position sensor
• Power steering pressure sensor
• Refrigerant pressure sensor
• EVAP control system pressure 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.
BBIA0354E
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