2009 NISSAN LATIO clutch

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

EC-912< SERVICE INFOMATION >
[MR TYPE 1]
DTC P1572 ASCD BRAKE SWITCH
2. Disconnect ASCD brake switch (2) harness connector.
- Stop lamp switch (1)
3. Turn ignition switch ON.
4. Check voltage between ASCD brake switch terminal 1 and ground with CONSULT-III or tester.
OK or NG OK (M/T models) >>GO TO 6.
OK (A/T and CVT m odels) >>GO TO 7.
NG >> GO TO 5. 5.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M69, E7
• 10A fuse
• Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors. 6.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between ASCD brake switch terminal 2 and ASCD clutch switch terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 7.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 100 and ASCD brake 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 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 8.
CHECK ASCD BRAKE SWITCH
Refer to EC-914, " Component Inspection " . BBIA0708E
Voltage: Battery voltage
PBIB0857E
Continuity should exist.
Continuity should exist.

DTC P1572 ASCD BRAKE SWITCH
EC-913
< SERVICE INFOMATION >
[MR TYPE 1] C
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OK or NG OK >> GO TO 15.
NG >> Replace ASCD brake switch. 9.
CHECK ASCD CLUTCH SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 100 and ASCD clutch 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 10.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 10.
CHECK ASCD CLUTCH SWITCH
Refer to EC-914, " Component Inspection "
OK or NG OK >> GO TO 15.
NG >> Replace ASCD clutch switch. 11.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch (1) harness connector.
- ASCD brake switch (2)
3. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 13.
NG >> GO TO 12. 12.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M69, E7
• 10A fuse Continuity should exist.
BBIA0708E
Voltage: Battery voltage PBIB3317E

OK >> GO TO 14.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. Component Inspection "
OK or NG OK >> GO TO 15.
NG >> Replace stop lamp switch. .
>> INSPECTION END
Component Inspection INFOID:0000000004537428
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 , and
perform step 3 again.
ASCD CLUTCH SWITCH
1. Turn ignition switch OFF.
2. Disconnect ASCD clutch switch harness connector. Continuity should exist.
Condition Continuity
Brake pedal: Fully released. Should exist.
Brake pedal: Slightly depressed. Should not exist.

DTC P1572 ASCD BRAKE SWITCH
EC-915
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
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M A EC
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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 , and
perform step 3 again.
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 , and perform step 3 again.
Condition Continuity
Clutch pedal: Fully released. Should exist.
Clutch pedal: Slightly depressed. Should not exist. SEC023D
Condition Continuity
Brake pedal: Fully released. Should not exist.
Brake pedal: Slightly depressed. Should exist. PBIB3318E

ASCD BRAKE SWITCH
EC-973
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
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G H
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M A EC
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ASCD BRAKE SWITCH
Component Description INFOID:0000000004537512
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-524 for the ASCD function.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004537513
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 de- pressed (M/T) OFF
BRAKE SW2
(Stop lamp switch) • Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON

ASCD BRAKE SWITCH
EC-975
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
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M A EC
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Diagnosis Procedure
INFOID:00000000045375151.
CHECK OVERALL FUNCTION-I
With CONSULT-III
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.
3. Check “BRAKE SW1” indication under the following conditions.
M/T models
A/T and CVT models
Without CONSULT-III
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 model s) >>GO TO 3.
NG (A/T and CVT models) >>GO TO 4. 2.
CHECK OVERALL FUNCTION-II
With CONSULT-III
Check “BRAKE SW2” indication in “DATA MONITOR” mode. TERMI-
NAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
99 R Stop lamp switch [Ignition switch: ON]
• Brake pedal: Fully released Approximately 0V
[Ignition switch: ON]
• Brake pedal: Slightly depressed BATTERY 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 de- pressed (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) 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 PBIB3315E

EC-976< SERVICE INFOMATION >
[MR TYPE 1]
ASCD BRAKE SWITCH
Without CONSULT-III
Check voltage between ECM terminal 99 and ground under the fol-
lowing conditions.
OK or NG OK >> INSPECTION END.
NG >> GO TO 11. 3.
CHECK ASCD CLUTCH SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD clutch switch (1) harness connector.
- Clutch pedal (2)
3. Turn ignition switch ON.
4. Check voltage between ASCD clutch switch terminal 1 and ground under the following conditions with CONSULT-III or
tester.
OK or NG OK >> GO TO 9.
NG >> GO TO 4. 4.
CHECK ASCD BRAKE SWITCH POWER SUPPLY
1. Turn ignition switch OFF. CONDITION INDICATION
Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON CONDITION VOLTAGE
Brake pedal: Fully released Approximately 0V
Brake pedal: Slightly depressed Battery voltage PBIB0311E
BBIA0709E
CONDITION VOLTAGE
Brake pedal: Fully released Battery voltage
Brake pedal: Slightly depressed Approx. 0V PBIB0857E