NISSAN LATIO 2008 Service Repair Manual

DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
EC-457
< SERVICE INFORMATION >
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Follow the procedure “With CONSULT-II” above.
PROCEDURE FOR DTC P2103
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
With CONSULT-II
1. Turn ignition switch ON and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. If DTC is detected, go to EC-459, "
Diagnosis Procedure".
With GST
Follow the procedure “With CONSULT-II” above.
SEF058Y

EC-458
< SERVICE INFORMATION >
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
Wiring Diagram
INFOID:0000000001702989
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
BBWA2644E

DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
EC-459
< SERVICE INFORMATION >
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Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis ProcedureINFOID:0000000001702990
1.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-II 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
COLORITEM CONDITION DATA (DC Voltage)
1LThrottle control motor
(Open)[Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully depressedApproximately 3.2V
2SBThrottle 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 releasedApproximately 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-460
< SERVICE INFORMATION >
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
3.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-II 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-136
.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-26, "Removal and Installation of IPDM E/R".
NG >> Repair or replace harness or connectors.
Ignition switch Voltage
OFF Approximately 0V
ONBattery voltage
(11 - 14V)
PBIA9568J
Continuity should exist.

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION
EC-461
< SERVICE INFORMATION >
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DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION
DescriptionINFOID:0000000001702991
NOTE:
If DTC P2101 is displayed with DTC P2100 or P2119, first perform the trouble diagnosis for DTC P2100
or P2119. Refer to EC-456
or EC-472.
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feed-
back to the ECM to control the throttle control motor to make the throttle valve opening angle properly in
response to driving condition.
On Board Diagnosis LogicINFOID:0000000001702992
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation ProcedureINFOID:0000000001702993
NOTE:
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 more than 11V when engine
is running.
WITH CONSULT-II
1. Turn ignition switch ON and wait at least 2 seconds.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 5 seconds.
4. If DTC is detected, go to EC-463, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2101
2101Electric throttle control
performanceElectric throttle control function does not oper-
ate properly.• Harness or connectors
(Throttle control motor circuit is open or
shorted)
• Electric throttle control actuator
Engine operating condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return
spring.
SEF058Y

EC-462
< SERVICE INFORMATION >
DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION
Wiring Diagram
INFOID:0000000001702994
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
BBWA2643E

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION
EC-463
< SERVICE INFORMATION >
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Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis ProcedureINFOID:0000000001702995
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body.
Refer to EC-142, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
1LThrottle control motor
(Open)[Ignition switch: ON]
• Engine stopped
• Shift lever: D (A/T, CVT), 1st (M/T)
• Accelerator pedal: Fully depressedApproximately 3.2V
2SBThrottle 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 releasedApproximately 1.8V
15 Y Throttle control motor relay[Ignition switch: OFF]BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]0 - 1.0V
PBIA8150J
PBIA8149J
:Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15
BBIA0698E

EC-464
< SERVICE INFORMATION >
DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION
Check voltage between ECM terminal 2 and ground under the fol-
lowing conditions with CONSULT-II or tester.
OK or NG
OK >> GO TO 10.
NG >> GO TO 3.
3.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 5.
NG >> GO TO 4.
4.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.
5.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1. Reconnect all harness connectors disconnected.
2. Check voltage between ECM terminal 15 and ground with CON-
SULT-II or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 6.
6.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E46.
3. Check harness 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 8.
NG >> GO TO 7.
Ignition switch Voltage
OFF Approximately 0V
ONBattery voltage
(11 - 14V)
PBIA9568J
Continuity should exist.
Voltage: Battery voltage
PBIA9569J
Continuity should exist.

DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION
EC-465
< SERVICE INFORMATION >
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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 FUSE
1. Disconnect 15A fuse.
2. Check 15A fuse for blown.
OK or NG
OK >> GO TO 9.
NG >> Replace 15A fuse.
9.CHECK INTERMITTENT INCIDENT
Refer to EC-136
.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-26, "Removal and Installation of IPDM E/R".
NG >> Repair or replace harness or connectors.
10.CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Turn ignition switch OFF.
2. Disconnect electric throttle control actuator (1) harness connec-
tor.
- : Vehicle front
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> Repair or replace.
11 .CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct.
2. Check if foreign matter is caught between the throttle valve (1)
and the housing.
- : Vehicle front
OK or NG
OK >> GO TO 12.
NG >> Remove the foreign matter and clean the electric throttle
control actuator inside.
12.CHECK THROTTLE CONTROL MOTOR
Electric throttle control
actuator terminalECM terminal Continuity
51 Should not exist.
4 Should exist.
61 Should exist.
4 Should not exist.
PBIB3325E
BBIA0711E

EC-466
< SERVICE INFORMATION >
DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION
Refer to EC-466, "Component Inspection".
OK or NG
OK >> GO TO 13.
NG >> GO TO 14.
13.CHECK INTERMITTENT INCIDENT
Refer to EC-136
.
OK or NG
OK >> GO TO 14.
NG >> Repair or replace harness or connectors.
14. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-76, "
Throttle Valve Closed Position Learning".
3. Perform EC-76, "
Idle Air Volume Learning".
>>INSPECTION END
Component InspectionINFOID:0000000001702996
THROTTLE CONTROL MOTOR
1. Disconnect electric throttle control actuator harness connector.
2. Check resistance between terminals 5 and 6.
3. If NG, replace electric throttle control actuator and go to next
step.
4. Perform EC-76, "
Throttle Valve Closed Position Learning".
5. Perform EC-76, "
Idle Air Volume Learning".
Removal and InstallationINFOID:0000000001702997
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-18. Resistance: Approximately 1 - 15 Ω [at 25 °C (77°F)]
PBIB2909E