Nissan Titan A60. Manual - part 419

EC-342

< DTC/CIRCUIT DIAGNOSIS >

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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 

EC-343, "Diagnosis Procedure"

.

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 

EC-343, "Diagnosis Procedure"

.

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 

EC-343, "Diagnosis Procedure"

.

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 >

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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.

See 

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.

See 

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 

EC-119, "VIN Registration"

.

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 >

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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 

EC-344, "Diagnosis Procedure"

.

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.

See 

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.

See 

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 

EC-119, "VIN Registration"

.

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

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 >

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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 

EC-345, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006158795

1.

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

2. Loosen and retighten three ground screws on the body.

Refer to 

EC-139, "Ground Inspection"

.

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