2006 NISSAN VERSA brake light

DTC P1572 ASCD BRAKE SWITCH
EC-481
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Revision: June 20062007 Versa
14. CHECK STOP LAMP SWITCH
Refer to EC-481, "
Component Inspection"
OK or NG
OK >> GO TO 15.
NG >> Replace stop lamp switch.
15. CHECK INTERMITTENT INCIDENT
Refer to EC-143, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionUBS00QLS
ASCD BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Check continuity between ASCD brake switch terminals 1 and 2
under the following conditions.
If NG, adjust ASCD brake switch installation, refer to BR-6,
"BRAKE PEDAL" , and perform step 3 again.
ASCD CLUTCH SWITCH
1. Turn ignition switch OFF.
2. Disconnect ASCD clutch switch harness connector.
3. Check continuity between ASCD clutch switch terminals 1 and 2
under the following conditions.
If NG, adjust ASCD clutch switch installation, refer to CL-5,
"CLUTCH PEDAL" , and perform step 3 again.
Condition Continuity
Brake pedal: Fully released. Should exist.
Brake pedal: Slightly depressed. Should not exist.
SEC0 23 D
Condition Continuity
Clutch pedal: Fully released. Should exist.
Clutch pedal: Slightly depressed. Should not exist.
SEC0 23 D

EC-482Revision: June 2006
DTC P1572 ASCD BRAKE SWITCH
2007 Versa
STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check continuity between stop lamp switch terminals 1 and 2 under the following conditions.
If NG, adjust stop lamp switch installation, refer to BR-6, "
BRAKE PEDAL" , and perform step 3 again.
Condition Continuity
Brake pedal: Fully released. Should not exist.
Brake pedal: Slightly depressed. Should exist.
PBIB3318E

EC-488Revision: June 2006
DTC P1805 BRAKE SWITCH
2007 Versa
DTC P1805 BRAKE SWITCHPFP:25320
DescriptionUBS00QLX
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 ModeUBS00QLY
Specification data are reference values.
On Board Diagnosis LogicUBS00QLZ
The MIL will not light up for this self-diagnosis.
FAIL -S AFE M OD E
When the malfunction is detected, the ECM enters in fail-safe mode.
DTC Confirmation ProcedureUBS00QM1
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-490, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW

Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1805
1805Brake switchA brake switch signal is not sent to ECM for
extremely long time while the vehicle is driv-
ing.

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
Engine: Idling Normal
Accelerating Poor acceleration
PBIB1952E

EC-490Revision: June 2006
DTC P1805 BRAKE SWITCH
2007 Versa
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 ProcedureUBS00QM3
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 (1) harness connector.
–Brake pedal (2)
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.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
99 R Stop lamp switch[Ignition switch: OFF]

Brake pedal: Fully releasedApproximately 0V
[Ignition switch: OFF]

Brake pedal: Slightly depressedBATTERY VOLTAGE
(11 - 14V)
Brake pedal Stop lamp
Fully released Not illuminated
Slightly depressed Illuminated
BBIA0710E
Voltage: Battery voltage
PBIB3317E

EC-492Revision: June 2006
DTC P1805 BRAKE SWITCH
2007 Versa
Component InspectionUBS00QM4
STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check continuity between stop lamp switch terminals 1 and 2 under the following conditions.
If NG, adjust stop lamp switch installation, refer to BR-6, "
BRAKE PEDAL" , and perform step 3 again.
Condition Continuity
Brake pedal: Fully released. Should not exist.
Brake pedal: Slightly depressed. Should exist.
PBIB3318E

ASCD BRAKE SWITCH
EC-549
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EC
Revision: June 20062007 Versa
ASCD BRAKE SWITCHPFP:25320
Component DescriptionUBS00QNW
When depress on the brake pedal, ASCD brake switch (2) is turned
OFF and stop lamp switch (1) is turned ON. ECM detects the state of
the brake pedal by this input of two kinds (ON/OFF signal)
Refer to EC-28, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)"
for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeUBS00QNX
Specification data are reference values.
BBIA0708E
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW1
(ASCD brake switch)

Ignition switch: ON

Brake pedal: Fully released (A/T, CVT)

Brake pedal and clutch pedal: Fully
released (M/T)ON

Brake pedal: Slightly depressed (A/T, CVT)

Brake pedal and/or clutch pedal: Slightly
depressed (M/T)OFF
BRAKE SW2
(Stop lamp switch)

Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON

ASCD BRAKE SWITCH
EC-551
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EC
Revision: June 20062007 Versa
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.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
99 R Stop lamp switch[Ignition switch: ON]

Brake pedal: Fully releasedApproximately 0V
[Ignition switch: ON]

Brake pedal: Slightly depressedBATTERY VOLTAGE
(11 - 14V)
100 G ASCD brake switch[Ignition switch: ON]

Brake pedal: Slightly depressed (A/T, CVT)

Brake pedal and/or clutch pedal: Slightly
depressed (M/T) Approximately 0V
[Ignition switch: ON]

Brake pedal: Fully released (A/T, CVT)

Brake pedal and clutch pedal: Fully released
(M/T)BATTERY VOLTAGE
(11 - 14V)

EC-552Revision: June 2006
ASCD BRAKE SWITCH
2007 Versa
Diagnostic ProcedureUBS00QNZ
1. CHECK OVERALL FUNCTION-I
With CONSULT-II
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CON-
SULT-II.
3. Check “BRAKE SW1” indication under the following conditions.
M/T models
A/T and CVT models
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 100 and ground under the
following conditions.
M/T models
A/T and CVT models
OK or NG
OK >> GO TO 2.
NG (M/T models) >>GO TO 3.
NG (A/T and CVT models) >>GO TO 4.
CONDITION INDICATION
Clutch pedal and/or brake pedal: Slightly depressed OFF
Clutch pedal and brake pedal: Fully released ON
CONDITION INDICATION
Brake pedal: Slightly depressed OFF
Brake pedal: Fully released ON
CONDITION VOLTAGE
Clutch pedal and/or brake pedal: Slightly depressed Approximately 0V
Clutch pedal and brake pedal: Fully released Battery voltage
CONDITION VOLTAGE
Brake pedal: Slightly depressed Approximately 0V
Brake pedal: Fully released Battery voltage
SEC0 11D
PBIB3315E