Infiniti I30. Emission Control System (2003 year). Manual

DTC Confirmation Procedure

NHEC1435

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 bat-
tery voltage is more than 10V at idle.

SEF058Y

With CONSULT-II

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and let it idle for 1 second.

If DTC is detected, go to “Diagnostic Procedure”, EC-659.

With GST

Follow the procedure “WITH CONSULT-II” above.

IDX

DTC P2135 TP SENSOR

DTC Confirmation Procedure

EC-657

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.

TERMI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Sensor ground

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

Approximately 0V

Throttle position sensor
1

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Shift lever position is “D”

쐌

Accelerator pedal released

More than 0.36V

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Shift lever position is “D”

쐌

Accelerator pedal fully depressed

Less than 4.75V

Throttle position sensor
2

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Shift lever position is “D”

쐌

Accelerator pedal released

Less than 4.75V

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Shift lever position is “D”

쐌

Accelerator pedal fully depressed

More than 0.36V

111

Sensor power supply

[Ignition switch “ON”]

Approximately 5V

Diagnostic Procedure

NHEC1370

RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEC047D

䊳

GO TO 2.

IDX

DTC P2135 TP SENSOR

Wiring Diagram (Cont’d)

EC-659

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT

1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch “ON”.

SEC054D

3. Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-II or tester.

PBIB0082E

Voltage: Approximately 5V

OK or NG

䊳

GO TO 3.

䊳

Repair open circuit or short to ground or short to power in harness or connectors.

CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Check harness continuity between electric throttle control actuator terminal 5 and engine ground.

Refer to Wiring Diagram.

Continuity should exist.

3. Also check harness for short to ground and short to power.

OK or NG

䊳

GO TO 5.

䊳

GO TO 4.

DETECT MALFUNCTIONING PART

Check the following.

쐌

Joint connector-20

쐌

Harness for open or short between electric throttle control actuator and ECM

䊳

Repair open circuit or short to ground or short to power in harness or connectors.

DTC P2135 TP SENSOR

Diagnostic Procedure (Cont’d)

EC-660

CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 83 and electric throttle control actuator terminal 4, ECM terminal 84

and electric throttle control actuator terminal 2.
Refer to Wiring Diagram.

Continuity should exist.

3. Also check harness for short to ground and short to power.

OK or NG

䊳

GO TO 6.

䊳

Repair open circuit or short to ground or short to power in harness or connectors.

CHECK THROTTLE POSITION SENSOR

Refer to “Component Inspection”, EC-661.

OK or NG

䊳

GO TO 8.

䊳

GO TO 7.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace the electric throttle control actuator.
2. Perform “Throttle Valve Closed Position Learning”, EC-71.
3. Perform “Idle Air Volume Learning”, EC-71.

䊳

INSPECTION END

CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.

䊳

INSPECTION END

SEC900C

Component Inspection

NHEC1371

THROTTLE POSITION SENSOR
1.

Reconnect all harness connectors disconnected.

Perform “Throttle Valve Closed Position Learning”, EC-71.

Turn ignition switch “ON”.

Set selector lever to “D” position.

Check voltage between ECM terminals 83 (TP sensor 1), 84
(TP sensor 2) and engine ground under the following condi-
tions.

Terminal

Accelerator pedal

Voltage

83
(Throttle position sensor
1)

Released

More than 0.36V

Fully depressed

Less than 4.75V

84
(Throttle position sensor
2)

Released

Less than 4.75V

Fully depressed

More than 0.36V

If NG, replace electric throttle control actuator and go to the
next step.

Perform “Throttle Valve Closed Position Learning”, EC-71.

Perform “Idle Air Volume Learning”, EC-71.

IDX

DTC P2135 TP SENSOR

Diagnostic Procedure (Cont’d)

EC-661

PBIB1741E

Component Description

NHEC1379

The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accel-
erator position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal
from these signals and controls the throttle control motor based on
these signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The
ECM uses this signal for the engine operation such as fuel cut.

CONSULT-II Reference Value in Data Monitor
Mode

NHEC1380

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

ACCEL SEN1

쐌

Ignition switch: ON
(engine stopped)

쐌

Shift lever: “D”

Accelerator pedal: Released

0.41 - 0.71V

Accelerator pedal: Fully depressed

More than 3.7V

ACCEL SEN2*

쐌

Ignition switch: ON
(engine stopped)

쐌

Shift lever: “D”

Accelerator pedal: Released

0.15 - 0.97V

Accelerator pedal: Fully depressed

More than 3.5V

CLSD THL POS

쐌

Ignition switch: ON
(engine stopped)

쐌

Shift lever: “D”

Accelerator pedal: Released

Accelerator pedal: Slightly
depressed

OFF

*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.

On Board Diagnosis Logic

NHEC1438

This self-diagnosis has the one trip detection logic.

DTC No.

Trouble diagnosis

name

DTC Detecting Condition

Possible Cause

P2138
2138

Accelerator pedal
position sensor circuit
range/performance
problem

Rationally incorrect voltage is sent to ECM com-
pared with the signals from APP sensor 1 and
APP sensor 2.

쐌

Harness or connector
(The APP sensor 1 and 2 circuit is
open or shorted.)

쐌

Accelerator pedal position sensor 1
and 2

DTC P2138 APP SENSOR

Component Description

EC-662

FAIL-SAFE MODE

=NHEC1438S01

When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.

Engine operation condition in fail-safe mode

The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within
+10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.

DTC Confirmation Procedure

NHEC1439

SEF058Y

With CONSULT-II

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and let it idle for 1 second.

If DTC is detected, go to “Diagnostic Procedure”, EC-665.

With GST

Follow the procedure “WITH CONSULT-II” above.

IDX

DTC P2138 APP SENSOR

On Board Diagnosis Logic (Cont’d)

EC-663

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.

TERMI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Sensor ground

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

Approximately 0V

Accelerator pedal posi-
tion sensor 2 power
supply

[Ignition switch “ON”]

Approximately 2.5V

B/P

Accelerator pedal posi-
tion sensor 2 ground

[Ignition switch “ON”]

Approximately 0V

Accelerator pedal posi-
tion sensor 1

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Shift lever: “D”

쐌

Accelerator pedal released

0.41 - 0.71V

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Shift lever: “D”

쐌

Accelerator pedal fully depressed

More than 3.7V

W/B

Accelerator pedal posi-
tion sensor 2

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Shift lever: “D”

쐌

Accelerator pedal released

0.08 - 0.48V

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Shift lever: “D”

쐌

Accelerator pedal fully depressed

More than 1.8V

111

Sensor power supply

[Ignition switch “ON”]

Approximately 5V

Diagnostic Procedure

NHEC1384

RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEC047D

䊳

GO TO 2.

IDX

DTC P2138 APP SENSOR

Wiring Diagram (Cont’d)

EC-665

CHECK APP SENSOR POWER SUPPLY CIRCUIT

1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch “ON”.

SEC081D

3. Check voltage between APP sensor terminals 4, 6 and ground with CONSULT-II or tester.

MTBL1167

SEC092D

OK or NG

䊳

GO TO 4.

䊳

GO TO 3.

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors M229, F66

쐌

Harness connectors M223, F53

쐌

Harness for open or short between ECM and accelerator pedal position sensor

䊳

Repair open circuit or short to ground or short to power in harness or connectors.

CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Check harness continuity between APP sensor terminals 1, 3 and engine ground.

Refer to Wiring Diagram.

Continuity should exist.

3. Also check harness for short to ground and short to power.

OK or NG

䊳

GO TO 6.

䊳

GO TO 5.

DTC P2138 APP SENSOR

Diagnostic Procedure (Cont’d)

EC-666

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors M229, F66

쐌

Joint connector-20

쐌

Harness for open or short between ECM and accelerator pedal position sensor

䊳

Repair open circuit or short to ground or short to power in harness or connectors.

CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 73 and APP sensor terminal 5, ECM terminal 74 and APP sensor ter-

minal 2.
Refer to Wiring Diagram

Continuity should exist.

3. Also check harness for short to ground and short to power.

OK or NG

䊳

GO TO 8.

䊳

GO TO 7.

DETECT MALFUNCTIONING PART

Check the following.

쐌

Harness connectors M229, F66

쐌

Harness for open or short between ECM and accelerator pedal position sensor

䊳

Repair open circuit or short to ground or short to power in harness or connectors.

CHECK APP SENSOR

Refer to “Component Inspection”, EC-667.

OK or NG

䊳

GO TO 9.

䊳

Replace accelerator pedal assembly.

CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.

䊳

IINSPECTION END

SEC901C

Component Inspection

NHEC1385

ACCELERATOR PEDAL POSITION SENSOR
1.

Reconnect all harness connectors disconnected.

Turn ignition switch “ON”.

Check voltage between ECM terminals 73 (APP sensor 1
signal), 74 (APP sensor 2 signal) and engine ground under the
following conditions.

IDX

DTC P2138 APP SENSOR

Diagnostic Procedure (Cont’d)

EC-667

Terminal

Accelerator pedal

Voltage

73
(Accelerator pedal posi-
tion sensor 1)

Released

0.41 - 0.71V

Fully depressed

More than 3.7V

74
(Accelerator pedal posi-
tion sensor 2)

Released

0.08 - 0.48V

Fully depressed

More than 1.8V

If NG, replace accelerator pedal assembly.

Perform “Accelerator Pedal Released Position Learning”,
EC-71.

Perform “Throttle Valve Closed Position Learning”, EC-71.

Perform “Idle Air Volume Learning”, EC-71.

DTC P2138 APP SENSOR

Component Inspection (Cont’d)

EC-668

Description

NHEC0596

SYSTEM DESCRIPTION

NHEC0596S01

Sensor

Input Signal to ECM

ECM func-

tion

Actuator

Mass air flow sensor

Amount of intake air

VIAS con-
trol

VIAS control solenoid valve

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Ignition switch

Start signal

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed

Engine coolant temperature sensor

Engine coolant temperature

PBIB1822E

When the engine is running at medium speed, the ECM sends the
ON signal to the VIAS control solenoid valve. This signal introduces
the intake manifold vacuum into the power valve actuator and
therefore closes the power valve.
Under this condition, the effective intake manifold length is equiva-
lent to the total length of passage A and passage B. This long
intake manifold provides increased amount of intake air, which
results in improved suction efficiency and higher torque.
When engine is running at low or high speed, the ECM sends the
OFF signal to the VIAS control solenoid valve and the power valve
is opened.
Under this condition, the effective intake manifold length is equiva-
lent to the length of passage B. This shortened intake manifold
length results in enhanced engine output due to reduced suction
resistance under high speeds.

IDX

VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)

Description

EC-669

SEC059D

COMPONENT DESCRIPTION

NHEC0596S02

Power Valve

NHEC0596S0201

The power valve is installed in intake manifold collector and used
to control the suction passage of the variable induction air control
system. It is set in the fully closed or fully opened position by the
power valve actuator operated by the vacuum stored in the surge
tank. The vacuum in the surge tank is controlled by the VIAS con-
trol solenoid valve.

SEC058D

VIAS Control Solenoid Valve

NHEC0596S0202

The VIAS control solenoid valve cuts the intake manifold vacuum
signal for power valve control. It responds to ON/OFF signals from
the ECM. When the solenoid is off, the vacuum signal from the
intake manifold is cut. When the ECM sends an ON signal the coil
pulls the plunger downward and feeds the vacuum signal to the
power valve actuator.

VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)

Description (Cont’d)

EC-670

Wiring Diagram

NHEC0597

MEC897D

SEF636XC

IDX

VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)

Wiring Diagram

EC-671

Diagnostic Procedure

NHEC0598

CHECK OVERALL FUNCTION

With CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CONSULT-II.
3. Turn VIAS control solenoid valve “ON” and “OFF”, and make sure that power valve actuator rod moves.

SEC128D

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Rev engine quickly up to above 5,000 rpm and make sure that power valve actuator rod moves.

SEC060D

OK or NG

䊳

INSPECTION END

䊳

GO TO 2.

VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)

Diagnostic Procedure

EC-672

Infiniti I30. Emission Control System (2003 year). Manual - part 42