2004 INFINITI FX35 Service Manual

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Page 2561 of 4449

INFINITI FX35 2004 Service Manual EC-1220
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DTC P1805 BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
DTC P1805 BRAKE SWITCHPFP:25320
DescriptionABS00CDA
Brake switch signal is applied to the ECM through the stop lamp switc

Page 2562 of 4449

INFINITI FX35 2004 Service Manual DTC P1805 BRAKE SWITCH
EC-1221
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Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS00CDE
TBWM0260E

Page 2563 of 4449

INFINITI FX35 2004 Service Manual EC-1222
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DTC P1805 BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground

Page 2564 of 4449

INFINITI FX35 2004 Service Manual DTC P1805 BRAKE SWITCH
EC-1223
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Revision: 2004 November 2004 FX35/FX45
3. DETECT MALFUNCTIONING PART
Check the following.
10A fuse
Fuse block (J/B) connector E201

Page 2565 of 4449

INFINITI FX35 2004 Service Manual EC-1224
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DTC P1805 BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
Component InspectionABS00CDG
STOP LAMP SWITCH
1. Disconnect stop lamp switch harness connector.
2. Check continuity betwe

Page 2566 of 4449

INFINITI FX35 2004 Service Manual DTC P2122, P2123 APP SENSOR
EC-1225
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Revision: 2004 November 2004 FX35/FX45
DTC P2122, P2123 APP SENSORPFP:18002
Component DescriptionABS00CDH
The accelerator pedal p

DTC P2122, P2123 APP SENSOR
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Revision: 2004 November 2004 FX35/FX45
DTC P2122, P2123 APP SENSORPFP:18002
Component DescriptionABS00CDH
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor 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 oper-
ation such as fuel cut.
CONSULT-II Reference Value in Data Monitor ModeABS00CDI
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage.
On Board Diagnosis LogicABS00CDJ
These self-diagnoses have the one trip detection logic.
NOTE:
If DTC P2122 or P2123 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229.
Refer to EC-1156
.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
PBIB1741E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN1
Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.5 - 1.0V
Accelerator pedal: Fully depressed 4.0 - 4.7V
ACCEL SEN2*
Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.3 - 1.2V
Accelerator pedal: Fully depressed 3.9 - 4.8V
CLSD THL POS
Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2122
2122Accelerator pedal posi-
tion sensor 1 circuit low
inputAn excessively low voltage from the APP sen-
sor 1 is sent to ECM.
Harness or connectors
(APP sensor 1 circuit is open or
shorted.)
Accelerator pedal position sensor
(Accelerator pedal position sensor 1) P2123
2123Accelerator pedal posi-
tion sensor 1 circuit high
inputAn excessively high voltage from the APP sen-
sor 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.

Page 2567 of 4449

INFINITI FX35 2004 Service Manual EC-1226
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DTC P2122, P2123 APP SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC Confirmation ProcedureABS00CDK
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ig

Page 2568 of 4449

INFINITI FX35 2004 Service Manual DTC P2122, P2123 APP SENSOR
EC-1227
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Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS00CDL
TBWM0239E

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