Infiniti M45 (Y34). Manual — part 378
DTC P0122, P0123 TP SENSOR
EC-201
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EC
Wiring Diagram
ABS002FZ
TBWA0282E
EC-202
DTC P0122, P0123 TP SENSOR
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
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.
Diagnostic Procedure
ABS002G0
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten two ground screws.
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
89
B
Sensor ground
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
98
w
Throttle position sensor 2
[Ignition switch: ON]
●
Engine stopped
●
Selector lever: D
●
Accelerator pedal: Fully released
Less than 4.75V
[Ignition switch: ON]
●
Engine stopped
●
Selector lever: D
●
Accelerator pedal: Fully depressed
More than 0.36V
103
L
Sensor power supply
[Ignition switch: ON]
Approximately 5V
108
B/W
Throttle position sensor 1
[Ignition switch: ON]
●
Engine stopped
●
Selector lever: D
●
Accelerator pedal: Fully released
More than 0.36V
[Ignition switch: ON]
●
Engine stopped
●
Selector lever: D
●
Accelerator pedal: Fully depressed
Less than 4.75V
PBIB1118E
DTC P0122, P0123 TP SENSOR
EC-203
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EC
2.
CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT
1.
Disconnect electric throttle control actuator harness connector.
2.
Turn ignition switch: ON.
3.
Check voltage between electric throttle control actuator terminal
1 and ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
3.
CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch: OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between electric throttle control actuator terminal 5 and ECM terminal 89.
Refer to Wiring Diagram.
4.
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.
●
Joint connector-30
●
Harness for open or short between electric throttle control actuator and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between ECM terminal 98 and electric throttle control actuator terminal 2.
Refer to Wiring Diagram.
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB0015E
Voltage: Approximately 5V
PBIB0082E
Continuity should exist.
Continuity should exist.
EC-204
DTC P0122, P0123 TP SENSOR
6.
CHECK THROTTLE POSITION SENSOR
Refer to
EC-204, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace the electric throttle control actuator.
2.
Perform
EC-44, "Accelerator Pedal Released Position Learning"
.
3.
Perform
EC-44, "Throttle Valve Closed Position Learning"
4.
Perform
EC-44, "Idle Air Volume Learning"
>> INSPECTION END
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
ABS002G1
THROTTLE POSITION SENSOR
1.
Reconnect all harness connectors disconnected.
2.
Perform
EC-44, "Accelerator Pedal Released Position Learning"
.
3.
Perform
EC-44, "Throttle Valve Closed Position Learning"
4.
Turn ignition switch ON.
5.
Set selector lever to D position.
6.
Check voltage between ECM terminals 108 (TP sensor 1signal),
98 (TP sensor 2signal) and ground under the following condi-
tions.
7.
If NG, replace electric throttle control actuator and go to the next
step.
8.
Perform
EC-44, "Accelerator Pedal Released Position Learning"
.
9.
Perform
EC-44, "Throttle Valve Closed Position Learning"
10. Perform
EC-44, "Idle Air Volume Learning"
Removal and Installation
ABS002G2
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to
Terminal
Accelerator pedal
Voltage
108
(Throttle position sensor 1)
Fully released
More than 0.36V
Fully depressed
Less than 4.75V
98
(Throttle position sensor 2)
Fully released
Less than 4.75V
Fully depressed
More than 0.36V
PBIB0179E
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