Nissan Frontier D40. Manual - part 350

U0101 CAN COMM CIRCUIT

EC-91

< COMPONENT DIAGNOSIS >

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U0101 CAN COMM CIRCUIT

Description

INFOID:0000000005273050

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:0000000005273051

This self-diagnosis has the one trip detection logic.

DTC Confirmation Procedure

INFOID:0000000005273052

1.

Turn ignition switch ON and wait at least 3 seconds.

2.

Check DTC.

3.

If DTC is detected, go to 

EC-92, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005273053

Go to 

LAN-14, "Trouble Diagnosis Flow Chart"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

 U0101

0101

Lost communication 
with TCM

When ECM is not transmitting or receiving CAN 
communication signal of OBD (emission related di-
agnosis) with TCM for 2 seconds or more.

• CAN communication line between 

TCM and ECM

• CAN communication line open or 

shorted

EC-92

< COMPONENT DIAGNOSIS >

[QR25DE]

U0140 CAN COMM CIRCUIT

U0140 CAN COMM CIRCUIT

Description

INFOID:0000000005273054

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:0000000005273055

This self-diagnosis has the one trip detection logic.

DTC Confirmation Procedure

INFOID:0000000005273056

1.

Turn ignition switch ON and wait at least 3 seconds.

2.

Check DTC.

3.

If DTC is detected, go to 

EC-92, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005273057

Go to 

LAN-14, "Trouble Diagnosis Flow Chart"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

 U0140

0140

Lost communication 
with BCM

When ECM is not transmitting or receiving CAN 
communication signal of OBD (emission related di-
agnosis) with BCM for 2 seconds or more.

• CAN communication line between 

BCM and ECM

• CAN communication line open or 

shorted

U1001 CAN COMM CIRCUIT

EC-93

< COMPONENT DIAGNOSIS >

[QR25DE]

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U1001 CAN COMM CIRCUIT

Description

INFOID:0000000005273058

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:0000000005273059

The MIL will not light up for this self-diagnosis.

DTC Confirmation Procedure

INFOID:0000000005273060

1.

Turn ignition switch ON and wait at least 3 seconds.

2.

Check 1st trip DTC.

3.

If 1st trip DTC is detected, go to 

EC-93, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005273061

Go to 

LAN-48, "CAN System Specification Chart"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

  U1001

 1001

CAN communication line

When ECM is not transmitting or receiving CAN 
communication signal other than OBD (emission 
related diagnosis) for 2 seconds or more.

• Harness or connectors

(CAN communication line is open or 
shorted)

EC-94

< COMPONENT DIAGNOSIS >

[QR25DE]

P0011 IVT CONTROL

P0011 IVT CONTROL

On Board Diagnosis Logic

INFOID:0000000005273062

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode.

DTC Confirmation Procedure

INFOID:0000000005273063

CAUTION:

Always drive at a safe speed.
NOTE:
• If DTC P0011 is displayed with DTC P0075, first perform trouble diagnosis for DTC P0075. Refer to

EC-103

.

• 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 between 10V and 16V at
idle.

 WITH CONSULT-III

1.

Start engine and warm it up to the normal operating temperature.

2.

Maintain the following conditions for at least 10 consecutive seconds.
Hold the accelerator pedal as steady as possible.

3.

Stop vehicle with engine running and let engine idle for 10 seconds.

4.

Check 1st trip DTC.

5.

If the 1st trip DTC is detected, go to 

EC-95, "Diagnosis Procedure"

.

If the 1st trip DTC is not detected, go to next step.

6.

Maintain the following conditions for at least 20 consecutive seconds.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P0011
0011

Intake valve timing 
control performance

There is a gap between angle of target and 
phase-control angle degree.

• Crankshaft position sensor (POS)
• Camshaft position sensor (PHASE)
• Intake valve control solenoid valve
• Accumulation of debris to the signal pick-up 

portion of the camshaft

• Timing chain installation
• Foreign matter caught in the oil groove for in-

take valve timing control

Detected items

Engine operating condition in fail-safe mode

Intake valve timing control

The signal is not energized to the solenoid valve and the valve control does not function

ENG SPEED

1,200 - 2,000 rpm (A constant rotation is maintained.)

COOLAN TEMP/S

More than 60 

°

C (140 

°

F)

B/FUEL SCHDL

More than 4.3 msec

Shift lever

P or N (A/T), Neutral (M/T)

ENG SPEED

1,200 - 3,175 rpm (A constant rotation is maintained.)

COOLAN TEMP/S

65 - 120 

°

C (149 - 248 

°

F)

Shift lever

1st or 2nd position

Driving location uphill

Driving vehicle uphill
(Increased engine load will help maintain the driving 
conditions required for this test.)