2009 NISSAN LATIO service

DTC P1226 TP SENSOR
EC-897
< SERVICE INFOMATION >
[MR TYPE 1] C
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DTC P1226 TP SENSOR
Component Description INFOID:0000000004537406
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.
On Board Diagnosis Logic INFOID:0000000004537407
The MIL will not light up for this diagnosis.
DTC Confirmation Procedure INFOID:0000000004537408
NOTE:
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, confirm that battery voltage is more than 10V at idle.
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Repeat steps 3 and 4 for 32 times.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-897, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:00000000045374091.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
3. Check if foreign matter is c aught between the throttle valve (1)
and the housing.
- : Vehicle front
OK or NG OK >> GO TO 2.
NG >> Remove the foreign matter and clean the electric throttle control actuator inside. 2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-572, " Throttle Valve Closed Position Learning " . PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1226
1226 Closed throttle position
learning performance Closed throttle position learning is not per-
formed successfully, repeatedly. • Electric throttle control actuator
(TP sensor 1 and 2) BBIA0711E

EC-904< SERVICE INFOMATION >
[MR TYPE 1]
DTC P1564 ASCD STEERING SWITCH
Diagnosis Procedure INFOID:00000000045374201.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-632, " Ground Inspection " .
OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. 2.
CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch ON.
2. Select “MAIN SW”, “RESUME/ACC SW”, “SET SW and “CANCEL SW” in “DATA MONITOR” mode with
CONSULT-III.
3. Check each item indication under the following conditions. TERMI-
NAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
94 R ASCD steering switch [Ignition switch: ON]
• ASCD steering switch: OFF Approximately 4V
[Ignition switch: ON]
• MAIN switch: Pressed Approximately 0V
[Ignition switch: ON]
• CANCEL switch: Pressed Approximately 1V
[Ignition switch: ON]
• RESUME/ACCELERATE switch: Pressed Approximately 3V
[Ignition switch: ON]
• SET/COAST switch: Pressed Approximately 2V
95 B Sensor ground [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E
Switch Monitor item Condition Indication
MAIN switch MAIN SW Pressed ON
Released OFF
CANCEL switch CANCEL SW Pressed ON
Released OFF

EC-912< SERVICE INFOMATION >
[MR TYPE 1]
DTC P1572 ASCD BRAKE SWITCH
2. Disconnect ASCD brake switch (2) harness connector.
- Stop lamp switch (1)
3. Turn ignition switch ON.
4. Check voltage between ASCD brake switch terminal 1 and ground with CONSULT-III or tester.
OK or NG OK (M/T models) >>GO TO 6.
OK (A/T and CVT m odels) >>GO TO 7.
NG >> GO TO 5. 5.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M69, E7
• 10A fuse
• Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors. 6.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between ASCD brake switch terminal 2 and ASCD clutch switch terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 7.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 100 and ASCD brake switch terminal 2.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 8.
CHECK ASCD BRAKE SWITCH
Refer to EC-914, " Component Inspection " . BBIA0708E
Voltage: Battery voltage
PBIB0857E
Continuity should exist.
Continuity should exist.

DTC P1572 ASCD BRAKE SWITCH
EC-913
< SERVICE INFOMATION >
[MR TYPE 1] C
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OK or NG OK >> GO TO 15.
NG >> Replace ASCD brake switch. 9.
CHECK ASCD CLUTCH SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 100 and ASCD clutch switch terminal 2.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 10.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 10.
CHECK ASCD CLUTCH SWITCH
Refer to EC-914, " Component Inspection "
OK or NG OK >> GO TO 15.
NG >> Replace ASCD clutch switch. 11.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch (1) harness connector.
- ASCD brake switch (2)
3. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 13.
NG >> GO TO 12. 12.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M69, E7
• 10A fuse Continuity should exist.
BBIA0708E
Voltage: Battery voltage PBIB3317E

DTC P1572 ASCD BRAKE SWITCH
EC-915
< SERVICE INFOMATION >
[MR TYPE 1] C
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3. Check continuity between ASCD clutch switch terminals 1 and 2
under the following conditions.
If NG, adjust ASCD clutch switch installation, refer to CL-5 , and
perform step 3 again.
STOP LAMP SWITCH 1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check continuity between stop lamp switch terminals 1 and 2 under the following conditions.
If NG, adjust stop lamp switch installation, refer to BR-6 , and perform step 3 again.
Condition Continuity
Clutch pedal: Fully released. Should exist.
Clutch pedal: Slightly depressed. Should not exist. SEC023D
Condition Continuity
Brake pedal: Fully released. Should not exist.
Brake pedal: Slightly depressed. Should exist. PBIB3318E

EC-924< SERVICE INFOMATION >
[MR TYPE 1]
DTC P1805 BRAKE SWITCH
>> Repair open circuit or short to ground or short to power in harness or connectors. 4.
CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect stop lamp switch (1) harness connector.
2. Disconnect ECM harness connector.
3. Check harness continuity between stop lamp switch terminal 2 and ECM terminal 99.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness connectors. 5.
CHECK STOP LAMP SWITCH
Refer to EC-924, " Component Inspection " .
OK or NG OK >> GO TO 6.
NG >> Replace stop lamp switch. 6.
CHECK INTERMITTENT INCIDENT
Refer to EC-626 .
>> INSPECTION END
Component Inspection INFOID:0000000004537448
STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check continuity between stop lamp switch terminals 1 and 2 under the following conditions.
If NG, adjust stop lamp switch installation, refer to BR-6 , and perform step 3 again.
Continuity should exist.
Condition Continuity
Brake pedal: Fully released. Should not exist.
Brake pedal: Slightly depressed. Should exist. PBIB3318E

DTC P2100, P2103 THROTTLE
CONTROL MOTOR RELAY
EC-927
< SERVICE INFOMATION >
[MR TYPE 1] C
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Do not use ECM ground terminals wh
en measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis Procedure INFOID:00000000045374541.
CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Check voltage between ECM terminal 15 and ground with CON- SULT-III or tester.
OK or NG OK >> GO TO 5.
NG >> GO TO 2. 2.
CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E46.
3. Check continuity between ECM terminal 15 and IPDM E/R terminal 46. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 4.
NG >> GO TO 3. TERMI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
1 L Throttle control motor
(Open) [Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully depressed Approximately 3.2V
2 SB Throttle control motor power
supply [Ignition switch: ON] BATTERY VOLTAGE
(11 - 14V)
4 P Throttle control motor (Close) [Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully released Approximately 1.8V
15 Y Throttle control motor relay [Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON] 0 - 1.0V PBIA8150J
PBIA8149J
Voltage: Battery voltage
PBIA9569J
Continuity should exist.

EC-928< SERVICE INFOMATION >
[MR TYPE 1]
DTC P2100, P2103 THROTTLE
CONTROL MOTOR RELAY3.
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. 4.
CHECK FUSE
1. Disconnect 15A fuse.
2. Check 15A fuse for blown.
OK or NG OK >> GO TO 8.
NG >> Replace 15A fuse. 5.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
Check voltage between ECM terminal 2 and ground under the fol-
lowing conditions with CONSULT-III or tester.
OK or NG OK >> GO TO 8.
NG >> GO TO 6. 6.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector E43.
4. Check continuity between ECM terminal 2 and IPDM E/R terminal 8.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 8.
NG >> GO TO 7. 7.
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. 8.
CHECK INTERMITTENT INCIDENT
Refer to EC-626 .
OK or NG OK >> Replace IPDM E/R. Refer to
PG-27, " Removal and Installation of IPDM E/R " .
NG >> Repair or replace harness or connectors. Ignition switch Voltage
OFF Approximately 0V
ON Battery voltage
(11 - 14V) PBIA9568J
Continuity should exist.