Nissan Maxima. Manual - part 419

EC-160

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

U0101 CAN COMM CIRCUIT

U0101 CAN COMM CIRCUIT

Description

INFOID:0000000010094859

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.

DTC Logic

INFOID:0000000010094860

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 3 seconds.

2. Check DTC.
Is DTC detected?

YES

>>

EC-160, "Diagnosis Procedure"

.

NO

>> INSPECTION END 

Diagnosis Procedure

INFOID:0000000010094861

Go to 

LAN-15, "Trouble Diagnosis Flow Chart"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

U0101

Lost communication 
with TCM

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

• CAN communication line between 

TCM and ECM

• CAN communication line open or 

shorted

U1001 CAN COMM CIRCUIT

EC-161

< DTC/CIRCUIT DIAGNOSIS >

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U1001 CAN COMM CIRCUIT

Description

INFOID:0000000010094862

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.

DTC Logic

INFOID:0000000010094863

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 3 seconds.

2. Check DTC.
Is DTC detected?

YES

>>

EC-161, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010094864

Go to 

LAN-15, "Trouble Diagnosis Flow Chart"

.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

U1001

CAN communication 
line

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

• Harness or connectors

(CAN communication line is open or 
shorted)

EC-162

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0011, P0021 IVT CONTROL

P0011, P0021 IVT CONTROL

DTC Logic

INFOID:0000000010094865

DTC DETECTION LOGIC

NOTE:

If DTC P0011 or P0021 is displayed with DTC P0075, P0081, first perform the trouble diagnosis for DTC

P0075, P0081. Refer to 

EC-177, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing the next test. 

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.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is between 10 V and 16 V at

idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE-I

With CONSULT

1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT.

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

3. Maintain the following conditions for at least 6 consecutive seconds. Hold the accelerator pedal as steady

as possible.

CAUTION:

Always drive at a safe speed.

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

5. Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected?

YES

>> Go to 

EC-163, "Diagnosis Procedure"

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-II

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P0011

Intake valve timing 
control performance 
(bank 1)

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

• Crankshaft position sensor (POS)
• Camshaft position sensor (PHASE)
• Intake valve timing 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

P0021

Intake valve timing 
control performance 
(bank 2)

VHCL SPEED SE

100 - 120 km/h (63 - 75 mph)

ENG SPEED

1,200 - 2,000 rpm

COOLAN TEMP/S

More than 60

°C (140°F)

B/FUEL SCHDL

More than 7.3 msec

Selector lever

D position

P0011, P0021 IVT CONTROL

EC-163

< DTC/CIRCUIT DIAGNOSIS >

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With CONSULT

1. Maintain the following conditions for at least 20 consecutive seconds.

CAUTION:

Always drive at a safe speed.

2. Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected?

YES

>> Go to 

EC-163, "Diagnosis Procedure"

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010094866

1.

CHECK OIL PRESSURE WARNING LAMP

1. Start engine.

2. Check oil pressure warning lamp and confirm it is not illumi-

nated.

Is oil pressure warming lamp illuminated?

YES

>> Go to 

LU-8, "Inspection"

.

NO

>> GO TO 2.

2.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EC-164, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace malfunctioning intake valve timing control solenoid valve. Refer to 

EM-37, "Removal and

Installation (Upper Oil Pan)"

.

3.

CHECK CRANKSHAFT POSITION SENSOR (POS)

Refer to 

EC-299, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace crankshaft position sensor (POS). Refer to 

EM-37, "Removal and Installation (Upper Oil

Pan)"

.

4.

CHECK CAMSHAFT POSITION SENSOR (PHASE)

Refer to 

EC-302, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace malfunctioning camshaft position sensor (PHASE). Refer to 

EM-48, "Removal and Instal-

lation (LH)"

 (LH) or 

EM-49, "Removal and Installation (RH)"

 (RH).

5.

CHECK CAMSHAFT (INTAKE)

ENG SPEED

1,400 - 3,175 rpm (A constant rotation is maintained.)

COOLAN TEMP/S

More than 70

°C (158°F)

Selector lever

1st or 2nd position

Driving location uphill

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

PBIA8559J