Infiniti M45 (Y34). Manual - part 481

 

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Infiniti M45 (Y34). Manual - part 481

 

 

DTC P1805 BRAKE SWITCH

EC-613

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EC

3. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M61, M401

●

Fuse block (J/B) No. 1 connector M1

●

15A fuse

●

Harness for open and short between stop lamp switch and battery

>> 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 ECM harness connector.

2.

Disconnect stop lamp switch harness connector.

3.

Check harness continuity between ECM terminal 106 and stop
lamp 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 6.

NG

>> GO TO 5.

5. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M401, M61

●

Harness connectors M135, F105

●

Joint connector-7

●

Harness for open or short between ECM and stop lamp switch

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

6. 

CHECK STOP LAMP SWITCH 

Refer to 

EC-614, "Component Inspection"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Replace stop lamp switch.

7. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

PBIB0034E

EC-614

DTC P1805 BRAKE SWITCH

Component Inspection

ABS002SL

STOP LAMP SWITCH

1.

Disconnect stop lamp switch harness connector.

2.

Check continuity between stop lamp switch terminals 1 and 2
under the following conditions.

3.

If NG, adjust stop lamp switch installation, refer to 

BR-6,

"BRAKE PEDAL"

 , and perform step 2 again.

PBIB0034E

Conditions

Continuity

Brake pedal: Fully released

Should not exist.

Brake pedal: Slightly depressed

Should exist.

PBIB0118E

DTC P2122, P2123 APP SENSOR

EC-615

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DTC P2122, P2123 APP SENSOR

PFP:18002

Component Description

ABS002SM

Electric throttle control actuator consists of throttle control motor,
acceleration pedal position sensor, throttle position sensor, etc.
Accelerator pedal position sensor is connected to the accelerator
pedal through the throttle drum and accelerator wire, and detects the
accelerator pedal position by the throttle drum rotation angle.
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

ABS002SN

Specification data are reference values.

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

On Board Diagnosis Logic

ABS002SO

NOTE:
If DTC P2122, P2123 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229.
Refer to 

EC-531

 .

These self-diagnoses have the one trip detection logic.

FAIL-SAFE MODE

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

PBIB1741E

MONITOR ITEM

CONDITION

SPECIFICATION

ACCEL SEN 1
ACCEL SEN 2*

●

Ignition switch: ON
(engine stopped)

●

Selector lever: D

Accelerator pedal: Fully released

More than 0.36V

Accelerator pedal: Fully depressed

Less than 4.75V

CLSD THL POS

●

Ignition switch: ON
(engine stopped)

●

Selector lever: D

Accelerator pedal: Fully released

ON

Accelerator pedal: Slightly depressed

OFF

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2122
2122

Accelerator pedal position 
sensor 1 circuit low input

An excessively low voltage from the APP 
sensor 1 is sent to ECM.

●

Harness or connectors
(The APP sensor 1 circuit is open or 
shorted.)

●

Accelerator pedal position sensor
(Accelerator pedal position sensor 1)

P2123
2123

Accelerator pedal position 
sensor 1 circuit high input

An excessively high voltage from the APP 
sensor 1 is sent to ECM.

Engine operating 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. 

EC-616

DTC P2122, P2123 APP SENSOR

DTC Confirmation Procedure

ABS002SP

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 10V at idle.

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and let it idle for 1 second.

4.

If DTC is detected, go to 

EC-618, "Diagnostic Procedure"

 .

 WITH GST

Follow the procedure WITH CONSULT-II above.

SEF058Y

 

 

 

 

 

 

 

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