Infiniti M45 (Y34). Manual — part 481
DTC P1805 BRAKE SWITCH
EC-613
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D
E
F
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M
A
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
, 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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D
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M
A
EC
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
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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