2011 NISSAN LATIO ignition

TROUBLE DIAGNOSISEC-621
< SERVICE INFORMATION > [MR18DE]
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HO2S2 (B1)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for 1 minute under no load 0 - 0.3 V
←→ Approx. 0.6 -
1.0 V
HO2S2 MNTR (B1) LEAN ←→ RICH
VHCL SPEED SE • Turn drive wheels and compare CONSULT-III value with the speedometer
indication. Almost the same speed as the
speedometer indication.
BATTERY VOLT • Ignition switch: ON (Engine stopped) 11 - 14 V
ACCEL SEN 1 • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released
0.6 - 0.9 V
Accelerator pedal: Fully depressed 4.0 - 4.8 V
ACCEL SEN 2* • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released
0.6 - 0.9 V
Accelerator pedal: Fully depressed 3.9 - 4.8 V
EVAP SYS PRES • Ignition switch: ON Approx. 1.8 - 4.8 V
TP SEN 1-B1
TP SEN 2-B1* • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released
More than 0.36 V
• Shift lever: D (A/T, CVT), 1st (M/T) Accelerator pedal: Fully depressed
Less than 4.75 V
START SIGNAL • Ignition switch: ON → START → ON OFF → ON → OFF
CLSD THL POS • Ignition switch: ON Accelerator pedal: Fully released
ON
Accelerator pedal: Slightly depressed OFF
AIR COND SIG • Engine: After warming up, idle the
engine Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates.) ON
P/N POSI SW • Ignition switch: ON Shift lever: P or N (A/T, CVT),
Neutral (M/T)
ON
Shift lever: Except above OFF
PW/ST SIGNAL • Engine: After warming up, idle the
engine Steering wheel: Not being turned
OFF
Steering wheel: Being turned ON
LOAD SIGNAL • Ignition switch: ON Rear window defogger switch: ON
and/or Lighting switch: 2nd
ON
Rear window defogger switch and light-
ing switch: OFF OFF
IGNITION SW • Ignition switch: ON → OFF → ON ON → OFF → ON
HEATER FAN SW • Ignition switch: ON Heater fan: Operating
ON
Heater fan: Not operating OFF
BRAKE SW • Ignition switch: ON Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed ON
INJ PULSE-B1 • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
•No load Idle
2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
•No load Idl
e
8° - 18 ° BT
DC
2,000 rpm 25° - 45 ° BTDC
CAL/LD VALUE • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
•No load Idle
10% - 35%
2,500 rpm 10% - 35%
Monitor item
Condition Specification
Revision: May 2010 2011 Versa

EC-622
< SERVICE INFORMATION >[MR18DE]
TROUBLE DIAGNOSIS
MASS AIRFLOW• Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
•No load Idle
1.0 - 4.0 g·m/s
2,500 rpm 2.0 - 10.0 g·m/s
PURG VOL C/V • Engine: After warming up
• Air conditioner switch: OFF
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
•No load Idle
(Accelerator pedal is not depressed
even slightly, after engine starting)
0%
2,000 rpm 0 - 50%
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%
AIR COND RLY • Engine: After warming up, idle the
engine Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates) ON
FUEL PUMP RLY • For 1 second after turning ignition switch ON
• Engine running or cranking
ON
• Except above conditions OFF
VENT CONT/V • Ignition switch: ON OFF
THRTL RELAY • Ignition switch: ON ON
COOLING FAN • Engine: After warming up, idle the
engine
• Air conditioner switch: OFF Engine coolant temperature: 97
°C
(207 °F) or less OFF
Engine coolant temperature: Between
98 °C (208 °F) and 99 °C (210 °F) LOW
Engine coolant temperature: 100 °C
(212 °F) or more HIGH
HO2S2 HTR (B1) • Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and
at idle for 1 minute under no load ON
• Engine speed: Above 3,600 rpm OFF
I/P PULLY SPD • Vehicle speed: More than 20 km/h (12 MPH) Almost the same speed as the
tachometer indication
VEHICLE SPEED • Turn drive wheels and compare CONSULT-III value with the speedometer
indication. Alm
os
t
the same speed as the
speedometer indication
TRVL AFTER MIL • Ignition switch: ON Vehicle has traveled after MIL has
turned ON.0 - 65,535 km
(0 - 40,723 mile)
A/F S1 HTR (B1) • Engine: After warming up, idle the engine
(More than 140 seconds after starting engine.) 4 - 100%
AC PRESS SEN • Engine: Idle
• Air conditioner switch: ON (Compressor operates) 1.0 - 4.0 V
VHCL SPEED SE • Turn drive wheels and compare speedometer indication with the CONSULT-
III value. Almost the same speed as the
speedometer indication
SET VHCL SPD • Engine: Ru nningASCD: Operating The preset vehicle speed is
displayed.
Monitor item
Condition Specification
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISEC-623
< SERVICE INFORMATION > [MR18DE]
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*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they
differ from
ECM terminals voltage signal. MAIN SW
• Ignition switch: ON MAIN switch: Pressed
ON
MAIN switch: Released OFF
CANCEL SW • Ignition switch: ON CANCEL switch: Pressed
ON
CANCEL switch: Released OFF
RESUME/ACC SW • Ignition switch: ON RESUME/ACCELERATE switch:
Pressed
ON
RESUME/ACCELERATE switch: Re-
leased OFF
SET SW • Ignition switch: ON SET/COAST switch: Pressed
ON
SET/COAST switch: Released OFF
BRAKE SW1 • Ignition switch: ON • Brake pedal: Fully released (A/T,
CVT)
• Brake pedal and clutch pedal: Fully
released (M/T) ON
• Brake pedal: Slightly depressed (A/T, CVT)
• Brake pedal and/or clutch pedal:
Slightly depressed (M/T) OFF
BRAKE SW2 • Ignition switch: ON Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed ON
CRUISE LAMP • Ignition switch: ON MAIN switch: Pressed at the 1st time
→
at the 2nd time ON
→ OFF
SET LAMP • MAIN switch: ON
• Vehicle speed: Between 40 km/h
(25 MPH) and 144 km/h (89
MPH) ACSD: Operating
ON
ASCD: Not operating OFF
HO2 S2 DIAG1 (B1) DTC P0139 self-diagnosis (delayed response) is incomplete.
INCMP
DTC P0139 self-diagnosis (delayed response) is complete. CMPLT
HO2 S2 DIAG2 (B1) DTC P0139 self-diagnosis (slow
response) is incomplete. INCMP
DTC P0139 self-diagnosis (slo w response) is complete. CMPLT
A/F SEN1 DIAG1 (B1) DTC P015A and P015B self-diagnosis is incomplete.
INCMP
DTC P015A and P015B self-diagnosis is complete. CMPLT
A/F SEN1 DIAG2 (B1) DTC P014C and P014D self-diagnosis is incomplete.
INCMP
DTC P014C and P014D self-diagnosis is complete. CMPLT
A/F SEN1 DIAG3 (B1) The vehicle condition is not within the diagnosis range of DTC P014C, P014D,
P015A or P015B.
ABSNT
The vehicle condition is within the diagnosis range of DTC P014C, P014D,
P015A or P015B. PRSNT
Monitor item
Condition Specification
Revision: May 2010 2011 Versa

EC-628
< SERVICE INFORMATION >[MR18DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
>> GO TO 8.
8.CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITO R” mode, and make sure that the indication is within
the SP value.
OK or NG
OK >> INSPECTION END
NG >> GO TO 9.
9.PERFORM POWER BALANCE TEST
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode.
2. Make sure that the each cylinder produces a momentary engine speed drop.
OK or NG
OK >> GO TO 12.
NG >> GO TO 10.
10.DETECT MALFUNCTIONING PART
1. Check the following.
- Ignition coil and its circuit (Refer to EC-1019
.)
- Fuel injector and its circuit (Refer to EC-1009
.)
- Intake air leakage
- Low compression pressure (Refer to EM-186
.)
2. If NG, repair or replace the malfunctioning part. If OK, replace fuel injector. (It may be caus ed by leakage from fuel injector or clogging.)
>> GO TO 11.
11 .CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITO R” mode, and make sure that the indication is within
the SP value.
OK or NG
OK >> INSPECTION END
NG >> GO TO 12.
12.CHECK A/F SENSOR 1 FUNCTION
Perform all DTC Confirmation Procedure related with A/F sensor 1.
• For DTC P0130, refer to EC-704, "
DTC Confirmation Procedure".
• For DTC P0131, refer to EC-710, "
DTC Confirmation Procedure".
• For DTC P0132, refer to EC-716, "
DTC Confirmation Procedure".
• For DTC P014C, P014D refer to EC-750, "
DTC Confirmation Procedure".
• For DTC P2A00, refer to EC-989, "
DTC Confirmation Procedure".
OK or NG
OK >> GO TO 15.
NG >> GO TO 13.
13.CHECK A/F SENSOR 1 CIRCUIT
Perform Diagnostic Procedure according to corresponding DTC.
>> GO TO 14.
14.CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITO R” mode, and make sure that the indication is within
the SP value.
OK or NG
Revision: May 2010 2011 Versa

EC-630
< SERVICE INFORMATION >[MR18DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
2. Disconnect mass air flow sensor harness connector. Check pin terminal and connector for damage and
then reconnect it again.
>> GO TO 22.
22.CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITO R” mode, and make sure that the indication is within
the SP value.
OK or NG
OK >> 1. Detect malfunctioning part of mass air flow sensor circuit and repair it. Refer to EC-664.
2. GO TO 29.
NG >> GO TO 23.
23.CHECK “MAS A/F SE-B1”
Select “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.
OK or NG
OK >> GO TO 24.
NG (More than the SP value)>>Replace mass air flow sensor, and then GO TO 29.
24.REPLACE ECM
1. Replace ECM.
2. Perform initialization of NVIS(NATS) system and registration of all NVIS (NATS) ignition key IDs.
Refer to BL-247, "
ECM Re-communicating Function".
3. Perform EC-580, "
VIN Registration".
4. Perform EC-580, "
Accelerator Pedal Released Position Learning".
5. Perform EC-580, "
Throttle Valve Closed Position Learning".
6. Perform EC-580, "
Idle Air Volume Learning".
>> GO TO 29.
25.CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
• Crushed air ducts
• Malfunctioning seal of air cleaner element
• Uneven dirt of air cleaner element
• Improper specification of intake air system
OK or NG
OK >> GO TO 27.
NG >> Repair or replace malfunctioning part, and then GO TO 26.
26.CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.
OK or NG
OK >> INSPECTION END
NG (Less than the SP value)>>GO TO 27.
27.CHECK “MAS A/F SE-B1”
Select “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.
OK or NG
OK >> GO TO 28.
NG (Less than the SP value)>>Replace mass air flow sensor, and then GO TO 30.
28.CHECK INTAKE SYSTEM
Check for the cause of air leak after the mass air flow sensor. Refer to the following.
Revision: May 2010 2011 Versa

EC-634
< SERVICE INFORMATION >[MR18DE]
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID:0000000006341749
1.INSPECTION START
Start engine.
Is engine running?
Ye s o r N o
Ye s > > G O T O 8 .
No >> GO TO 2.
2.CHECK ECM POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF and then ON.
2. Check voltage between ECM terminal 93 and ground with CON- SULT-III or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M69, E7
• 10 A fuse
• Harness for open or short between ECM and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-638, "
Ground Inspection".
TER-
MI-
NAL
NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
10 11 B
B
ECM ground
[Engine is running]
• Idle speed Body ground
32 P ECM relay
(Self shut-off) [Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition switch
OFF 0 - 1.0 V
[Ignition switch: OFF]
• More than a few seconds after turning ignition switch OFF BATTERY VOLTAGE
(11 - 14 V)
93 O Ignition switch [Ignition switch: OFF]
0 V
[Ignition switch: ON] BATTERY VOLTAGE
(11 - 14 V)
105 G Power supply for
ECM [Ignition switch: ON] BATTERY VOLTAGE
(11 - 14 V)
108 B ECM ground [Engine is running]
• Idle speed
Body ground
Voltage: Battery voltage
PBIA9561J
Revision: May 2010
2011 Versa

POWER SUPPLY AND GROUND CIRCUITEC-635
< SERVICE INFORMATION > [MR18DE]
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OK or NG
OK >> GO TO 5.
NG >> Repair or replace ground connections.
5.CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 10, 11, 108 and ground. Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F8, E8
• Harness for open or short between ECM and ground
>> Repair open circuit or short to power in harness or connectors.
7.CHECK ECM POWER SUPPLY CIRCUIT-II
1. Reconnect ECM harness connector.
2. Turn ignition switch ON.
3. Check voltage between IPDM E/R terminal 3 and ground with CONSULT-III or tester.
OK or NG
OK >> Go to EC-1019.
NG >> GO TO 8.
8.CHECK ECM POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON and then OFF.
: Vehicle front
1. Body ground E24 2. Engine ground F93. Engine ground F16
4. Body ground E15
BBIA0698E
Continuity should exist.
Voltage: Battery voltage
PBIB2658E
Revision: May 2010 2011 Versa

EC-636
< SERVICE INFORMATION >[MR18DE]
POWER SUPPLY AND GROUND CIRCUIT
3. Check voltage between ECM terminal 105 and ground with
CONSULT-III or tester.
OK or NG
OK >> GO TO 14.
NG (Battery voltage does not exist.)>>GO TO 9.
NG (Battery voltage exists for more than a few seconds.)>>GO TO 11 .
9.CHECK ECM POWER SUPPLY CIRCUIT-IV
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Check voltage between ECM terminal 32 and ground with CON- SULT-III or tester.
OK or NG
OK >> GO TO 10.
NG >> GO TO 11.
10.CHECK ECM POWER SUPPLY CIRCUIT-V
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E43.
3. Check harness continuity between ECM terminal 105 and IPDM E/R terminal 4. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 17.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
11 .CHECK ECM POWER SUPPLY CIRCUIT-VI
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E43.
3. Check harness continuity between ECM terminal 32 and IPDM E/R terminal 7. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 13.
NG >> GO TO 12.
12.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
Voltage: After turning ignition switch OFF, battery
voltage will exist for a few seconds, then drop
approximately 0 V.
PBIB3037E
Voltage: Battery voltage
PBIA9562J
Continuity should exist.
Continuity should exist.
Revision: May 2010 2011 Versa