Infiniti M35/M45 Y50. Manual — part 543
DTC P2138 APP SENSOR
EC-645
[VQ35DE]
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15.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1.
Replace accelerator pedal assembly.
2.
Perform
EC-86, "Accelerator Pedal Released Position Learning"
3.
Perform
EC-86, "Throttle Valve Closed Position Learning"
4.
Perform
EC-86, "Idle Air Volume Learning"
>> INSPECTION END
16.
CHECK INTERMITTENT INCIDENT
Refer to
EC-153, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Component Inspection
NBS0057F
ACCELERATOR PEDAL POSITION SENSOR
1.
Reconnect all harness connectors disconnected.
2.
Turn ignition switch ON.
3.
Check voltage between ECM terminals 106 (APP sensor 1 sig-
nal), 98 (APP sensor 2 signal) and ground under the following
conditions.
4.
If NG, replace accelerator pedal assembly and go to next step.
5.
Perform
EC-86, "Accelerator Pedal Released Position Learning"
6.
Perform
EC-86, "Throttle Valve Closed Position Learning"
7.
Perform
EC-86, "Idle Air Volume Learning"
Removal and Installation
NBS0057G
ACCELERATOR PEDAL
Refer to
ACC-3, "ACCELERATOR CONTROL SYSTEM"
Terminal
Accelerator pedal
Voltage
106
(Accelerator pedal position
sensor 1)
Fully released
0.4 - 1.1V
Fully depressed
3.7 - 4.8V
98
(Accelerator pedal position
sensor 2)
Fully released
0.20 - 0.55V
Fully depressed
1.85 - 2.40V
MBIB0023E
EC-646
[VQ35DE]
DTC P2A00, P2A03 A/F SENSOR 1
DTC P2A00, P2A03 A/F SENSOR 1
PFP:22693
Component Description
NBS0057H
The air fuel ratio (A/F) sensor 1 is a planar dual-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is the combination of a
Nernst concentration cell (sensor cell) with an oxygen-pump cell,
which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range (0.7 <
< air).
The exhaust gas components diffuse through the diffusion gap at the
electrode of the oxygen pump and Nernst concentration cell, where
they are brought to thermodynamic balance.
An electronic circuit controls the pump current through the oxygen-
pump cell so that the composition of the exhaust gas in the diffusion
gap remains constant at = 1. Therefore, the A/F sensor 1 is able to
indicate air/fuel ratio by this pumping of current. In addition, a heater
is integrated in the sensor to ensure the required operating tempera-
ture of 700 - 800
°
C (1,292 - 1,472
°
F).
CONSULT-II Reference Value in Data Monitor Mode
NBS0057I
Specification data are reference values.
On Board Diagnosis Logic
NBS0057J
To judge the malfunction, the A/F signal computed by ECM from the A/F sensor 1 signal is monitored not to be
shifted to LEAN side or RICH side.
DTC Confirmation Procedure
NBS0057K
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 at idle.
WITH CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Turn ignition switch ON and select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CON-
SULT-II.
SEF579Z
SEF580Z
MONITOR ITEM
CONDITION
SPECIFICATION
A/F SEN1 (B1)
A/F SEN1 (B2)
●
Engine: After warming up
Maintaining engine speed at 2,000 rpm
Fluctuates around 1.5 V
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible Cause
P2A00
2A00
(Bank 1)
Air fuel ratio (A/F) sensor 1
circuit range/performance
●
The output voltage computed by ECM from the
A/F sensor 1 signal is shifted to the lean side
for a specified period.
●
The A/F signal computed by ECM from the A/F
sensor 1 signal is shifted to the rich side for a
specified period.
●
A/F sensor 1
●
A/F sensor 1 heater
●
Fuel pressure
●
Fuel injector
●
Intake air leaks
P2A03
2A03
(Bank 2)
DTC P2A00, P2A03 A/F SENSOR 1
EC-647
[VQ35DE]
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EC
4.
Clear the self-learning coefficient by touching “CLEAR”.
5.
Turn ignition switch OFF and wait at least 10 seconds.
6.
Start engine and keep the engine speed between 3,500 and
4,000 rpm for 1 minute under no load.
7.
Let engine idle for 1 minute.
8.
Keep engine speed between 2,500 and 3,000 rpm for 20 min-
utes.
9.
If 1st trip DTC is detected, go to
EC-651, "Diagnostic Procedure"
.
WITH GST
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Disconnect mass air flow sensor (1) harness connector.
4.
Start engine and let it idle for at least 5 seconds.
5.
Stop engine and reconnect mass air flow sensor harness con-
nector.
6.
Select Service $03 with GST and make sure that DTC P0102 is
detected.
7.
Select Service $04 with GST and erase the DTC P0102.
8.
Start engine and keep the engine speed between 3,500 and
4,000 rpm for 1 minute under no load.
9.
Let engine idle for 1 minute.
10. Keep engine speed between 2,500 and 3,000 rpm for 20 min-
utes.
11. Select Service $07 with GST.
If 1st trip DTC is detected, go to
EC-651, "Diagnostic Procedure"
SEF968Y
PBIB2783E
EC-648
[VQ35DE]
DTC P2A00, P2A03 A/F SENSOR 1
Wiring Diagram
NBS0057L
BANK 1
TBWT0979E
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