Infiniti F50. Manual — part 490
DTC P1780 SHIFT CHANGE SIGNAL
EC-601
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EC
3.
REPLACE ECM
1.
Replace ECM.
2.
Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to
BL-200, "ECM Re-communicating Function"
.
3.
Perform
EC-46, "Accelerator Pedal Released Position Learning"
4.
Perform
EC-46, "Throttle Valve Closed Position Learning"
5.
Perform
EC-46, "Idle Air Volume Learning"
>> INSPECTION END
EC-602
DTC P1805 BRAKE SWITCH
DTC P1805 BRAKE SWITCH
PFP:25320
Description
EBS00MMN
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
EBS00MMO
Specification data are reference values.
On Board Diagnosis Logic
EBS00MMP
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
EBS00MMQ
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-604, "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 an
extremely long time while the vehicle is driving.
●
Harness or connectors
(Stop lamp switch circuit is open or
shorted.)
●
Stop lamp switch
Engine operation condition in fail-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
PBIB1952E
DTC P1805 BRAKE SWITCH
EC-603
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Wiring Diagram
EBS00MMR
TBWM0115E
EC-604
DTC P1805 BRAKE SWITCH
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
EBS00MMS
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)
106
R/W
Stop lamp switch
[Ignition switch “ON”]
●
Brake pedal is fully released
Approximately 0V
[Ignition switch “ON”]
●
Brake pedal is slightly depressed
BATTERY VOLTAGE
(11 - 14V)
Brake pedal
Stop lamp
Fully released
Not illuminated
Slightly depressed
Illuminated
PBIB0034E
Voltage: Battery voltage
PBIB0117E
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