NISSAN LATIO 2009 Service Repair Manual

EC
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DTC U0101 CAN COMMUNICATION LINE
Description INFOID:0000000004306003
CAN (Controller Area Network) is a serial communication li ne 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:0000000004306004
This self-diagnosis has the on e trip detection logic.
DTC Confirmation Procedure INFOID:0000000004306005
1. Turn ignition switch ON and wait at least 3 seconds.
2. Check DTC.
3. If DTC is detected, go to EC-1146, " Diagnosis Procedure " .
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
diagnosis) with TCM for 2 seconds or more. • CAN communication line between TCM
and ECM
• CAN communication line is open or short-
ed.

EC-1146< SERVICE INFOMATION >
[MR TYPE 2]
DTC U0101 CAN COMMUNICATION LINE
Wiring Diagram INFOID:0000000004306006
Diagnosis Procedure INFOID:0000000004306007
Go to LAN-26, " CAN System Specification Chart " . BBWA2626E

EC
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DTC U0140 CAN COMMUNICATION LINE
Description INFOID:0000000004477023
CAN (Controller Area Network) is a serial communication li ne 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:0000000004477024
This self-diagnosis has the on e trip detection logic.
DTC Confirmation Procedure INFOID:0000000004477025
1. Turn ignition switch ON and wait at least 3 seconds.
2. Check DTC.
3. If DTC is detected, go to EC-1148, " Diagnosis Procedure " .
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
diagnosis) with BCM for 2 seconds or more. • CAN communication line between BCM
and ECM
• CAN communication line is open or short-
ed.

EC-1148< SERVICE INFOMATION >
[MR TYPE 2]
DTC U0140 CAN COMMUNICATION LINE
Wiring Diagram INFOID:0000000004477026
Diagnosis Procedure INFOID:0000000004477027
Go to LAN-26, " CAN System Specification Chart " . BBWA2626E

EC
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DTC U1001 CAN COMMUNICATION LINE
Description INFOID:0000000004477028
CAN (Controller Area Network) is a serial communication li ne 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:0000000004477029
The MIL will not light up for this self-diagnosis.
DTC Confirmation Procedure INFOID:0000000004477030
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-1150, " Diagnosis Procedure " .
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-1150< SERVICE INFOMATION >
[MR TYPE 2]
DTC U1001 CAN COMMUNICATION LINE
Wiring Diagram INFOID:0000000004477031
Diagnosis Procedure INFOID:0000000004477032
Go to LAN-26, " CAN System Specification Chart " . BBWA2626E

DTC P0011 IVT CONTROL
EC-1151
< SERVICE INFOMATION >
[MR TYPE 2] C
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DTC P0011 IVT CONTROL
Description INFOID:0000000004499967
SYSTEM DESCRIPTION
*: This signal is sent to the ECM through CAN communication line.
This mechanism hydraulically controls cam phases c ontinuously with the fixed operating angle of the intake
valve. The ECM receives signals such as cranks haft position, camshaft position, engine speed, and engine
coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control sole-
noid valve depending on driving status. This makes it po ssible to control the shut/open timing of the intake
valve to increase engine torque in low/mid speed range and output in high-speed range.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004499968
Specification data are reference values. Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed and piston position
Intake valve
timing control Intake valve timing control
solenoid valve
Engine coolant temperature sensor Engine coolant temperature
ABS actuator and electric unit (control unit)
Vehicle speed*
Combination meter PBIB3333E
MONITOR ITEM CONDITION SPECIFICATION
INT/V TIM (B1) • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT), Neutral (M/T)
• No load Idle
−5 ° - 5 °CA
When revving engine up to 2,000 rpm
quickly Approx. 0
° - 40 °CA
INT/V SOL (B1) • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT), Neutral (M/T)
• No load Idle 0% - 2%
When revving engine up to 2,000 rpm
quickly Approx. 0% - 90%

.
• If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confir m that battery voltage is between 10V and 16V at
idle.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Maintain the following conditions for at least 10 consecutive seconds. Hold the accelerator pedal as steady as possible.
4. Let engine idle for 10 seconds.
5. If 1st trip DTC is detected, go to EC-1153, " Diagnosis Procedure " .
If 1st trip DTC is not detected, go to next step.
6. Maintain the following conditions for at least 20 consecutive seconds.
7. If 1st trip DTC is detected, go to EC-1153, " Diagnosis Procedure " .
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 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 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 rp
m (A constant rotation is maintained.)
COOLAN TEMP/S More than 60 °C (140 °F)
B/FUEL SCHDL More than 3.87 msec
Shift lever P or N position (A/T, CVT)
Neutral position (M/T)
ENG SPEED 2,000 - 3,175 rpm (A cons tant rotation is maintained.)
COOLAN TEMP/S 70 - 105 °C (158 - 221 °F)
Shift lever 1st or 2nd position
Driving location Driving vehicle uphill
(Increased engine load will help maintain the driving
conditions required for this test.)

DTC P0011 IVT CONTROL
EC-1153
< SERVICE INFOMATION >
[MR TYPE 2] C
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WITH GST
Follow the procedure “WITH CONSULT-III” above.
Diagnosis Procedure INFOID:00000000044999711.
CHECK OIL PRESSURE WARNING LAMP
1. Start engine.
2. Check oil pressure warning lamp and confirm it is not illumi- nated.
OK or NG OK >> GO TO 2.
NG >> Go to LU-16, " Inspection " .
2.
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE
Refer to EC-1154, " Component Inspection " .
OK or NG OK >> GO TO 3.
NG >> Replace intake valve timing control solenoid valve. 3.
CHECK CRANKSHAFT POSI TION SENSOR (POS)
Refer to EC-1298, " Component Inspection " .
OK or NG OK >> GO TO 4.
NG >> Replace crankshaft position sensor (POS). 4.
CHECK CAMSHAFT POSITI ON SENSOR (PHASE)
Refer to EC-1303, " Component Inspection " .
OK or NG OK >> GO TO 5.
NG >> Replace camshaft position sensor (PHASE). 5.
CHECK CAMSHAFT (INTAKE)
Check the following.
• Accumulation of debris to the signal plate of camshaft (1) rear end
• Chipping signal plate of camshaft rear end
OK or NG OK >> GO TO 6.
NG >> Remove debris and clean the signal plate of camshaft rear end or replace camshaft. 6.
CHECK TIMING CHAIN INSTALLATION
Check service records for any recent repairs that may cause timing chain misaligned.
Are there any service records that may cause timing chain misaligned?
Yes or No Yes >> Check timing chain installation. Refer to
EM-161, " Removal and Installation " .
No >> GO TO 7. 7.
CHECK LUBRICATION CIRCUIT PBIA8559J
PBIA9557J

EC-1154< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0011 IVT CONTROL
Refer to EM-170, " Removal and Installation " .
OK or NG OK >> GO TO 8.
NG >> Clean lubrication line. 8.
CHECK INTERMITTENT INCIDENT
Refer to EC-1138 .
For Wiring Diagram, refer to EC-1294, " Wiring Diagram " for CKP sensor (POS) and
EC-1300, " Wiring Dia-
gram " for CMP sensor (PHASE).
>> INSPECTION END
Component Inspection INFOID:0000000004499972
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
1. Disconnect intake valve timing control solenoid valve harness connector.
2. Check resistance between intake valve timing control solenoid valve as follows.
If NG, replace intake valve timing control solenoid valve.
If OK, go to next step.
3. Remove intake valve timing control solenoid valve.
4. Provide 12V DC between intake valve timing control solenoid valve terminals and then interrupt it. Make sure that the plunger
moves as shown in the figure.
CAUTION:
Do not apply 12V DC continuo usly for 5 seconds or more.
Doing so may result in damage to the coil in intake valve
timing control solenoid valve.
If NG, replace intake valve timing control solenoid valve.
NOTE:
Always replace O-ring when intake valve timing control
solenoid valve is removed.
Removal and Installation INFOID:0000000004499973
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
Refer to EM-161, " Removal and Installation " .
Terminal Resistance
1 and 2 6.7 - 7.7 Ω [at 20 °C (68 °F)]
1 or 2 and ground ∞Ω
(Continuity should not exist.) PBIB0574E
PBIB2388E