Nissan Pathfinder (2007 year). Manual — part 211
DTC P1805 BRAKE SWITCH
EC-555
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EC
2007 Pathfinder
DTC P1805 BRAKE SWITCH
PFP:25320
Description
UBS00KGS
Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.
This signal is used mainly to decrease the engine speed when the vehicle is driving.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KGT
Specification data are reference values.
On Board Diagnosis Logic
UBS00KGU
The MIL will not light up for this diagnosis.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation Procedure
UBS00KGV
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.
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Fully depress the brake pedal for at least 5 seconds.
3.
Erase the DTC with CONSULT-II.
4.
Select “DATA MONITOR” mode with CONSULT-II.
5.
If 1st trip DTC is detected, go to
EC-557, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
MONITOR ITEM
CONDITION
SPECIFICATION
BRAKE SW
●
Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1805
1805
Brake switch
A brake switch signal is not sent to ECM for
extremely long time while the vehicle is driving.
●
Harness or connectors
(Stop lamp switch circuit is open or
shorted.)
●
Stop lamp switch
Engine operating condition in fail-safe mode
ECM controls the electric throttle control actuator by regulating the throttle opening to a small range.
Therefore, acceleration will be poor.
Vehicle condition
Driving condition
When engine is idling
Normal
When accelerating
Poor acceleration
SEF058Y
EC-556
DTC P1805 BRAKE SWITCH
2007 Pathfinder
Wiring Diagram
UBS00KGW
BBWA2375E
DTC P1805 BRAKE SWITCH
EC-557
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2007 Pathfinder
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.
Diagnostic Procedure
UBS00KGX
1.
CHECK STOP LAMP SWITCH CIRCUIT
1.
Turn ignition switch OFF.
2.
Check the stop lamp when depressing and releasing the brake pedal.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1.
Disconnect stop lamp switch harness connector.
2.
Check voltage between stop lamp switch terminal 1 and ground
with CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
101
LG
Stop lamp switch
[Ignition switch: OFF]
●
Brake pedal: Fully released
Approximately 0V
[Ignition switch: OFF]
●
Brake pedal: Slightly depressed
BATTERY VOLTAGE
(11 - 14V)
Brake pedal
Stop lamp
Fully released
Not illuminated
Slightly depressed
Illuminated
BBIA0560E
Voltage: Battery voltage
PBIB1184E
EC-558
DTC P1805 BRAKE SWITCH
2007 Pathfinder
3.
DETECT MALFUNCTIONING PART
Check the following.
●
10A fuse
●
Fuse block (J/B) connector E160
●
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 101 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 5.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
5.
CHECK STOP LAMP SWITCH
Refer to
EC-559, "Component Inspection"
OK or NG
OK
>> GO TO 6.
NG
>> Replace stop lamp switch.
6.
CHECK INTERMITTENT INCIDENT
Refer to
EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Continuity should exist.
BBIA0560E
DTC P1805 BRAKE SWITCH
EC-559
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2007 Pathfinder
Component Inspection
UBS00KGY
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.
BBIA0560E
Conditions
Continuity
Brake pedal: Fully released
Should not exist.
Brake pedal: Slightly depressed
Should exist.
PBIB1185E
EC-560
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
2007 Pathfinder
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
PFP:16119
Component Description
UBS00KCC
Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle
control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends
an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition
switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not
provided to the ECM.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KCD
Specification data are reference values.
On Board Diagnosis Logic
UBS00KCE
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MlL lights up.
DTC Confirmation Procedure
UBS00KCF
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.
PROCEDURE FOR DTC P2100
With CONSULT-II
1.
Turn ignition switch ON and wait at least 2 seconds.
2.
Select “DATA MONITOR””mode with CONSULT-II.
3.
Start engine and let it idle for 5 seconds.
4.
If DTC is detected, go to
EC-563, "Diagnostic Procedure"
.
With GST
Follow the procedure “With CONSULT-II” above.
MONITOR ITEM
CONDITION
SPECIFICATION
THRTL RELAY
●
Ignition switch: ON
ON
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2100
2100
Throttle control motor
relay circuit open
ECM detects a voltage of power source for
throttle control motor is excessively low.
●
Harness or connectors
(Throttle control motor relay circuit is
open)
●
Throttle control motor relay
P2103
2103
Throttle control motor
relay circuit short
ECM detects the throttle control motor relay is
stuck ON.
●
Harness or connectors
(Throttle control motor relay circuit is
shorted)
●
Throttle control motor relay
Engine operating condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return
spring.
SEF058Y
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
EC-561
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EC
2007 Pathfinder
PROCEDURE FOR DTC P2103
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8V.
With CONSULT-II
1.
Turn ignition switch ON and wait at least 1 second.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
If DTC is detected, go to
EC-563, "Diagnostic Procedure"
With GST
Follow the procedure “With CONSULT-II” above.
SEF058Y
EC-562
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
2007 Pathfinder
Wiring Diagram
UBS00KCG
BBWA1760E
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