Diagnosis Procedure

CHECK OVERALL FUNCTION-I

With CONSULT-III

Turn ignition switch ON.
Select "BRAKE SW1" in "DATA MONITOR" mode with CONSULT-III.
Check "BRAKE SW1" indication under the following conditions.

M/T models

BRAKE SWITCH INDICATION CONDITION CHART

CONDITION	INDICATION
Clutch pedal and/or brake pedal: Slightly depressed	OFF
Clutch pedal and brake pedal: Fully released	ON

CVT models

BRAKE SWITCH INDICATION CONDITION CHART

CONDITION	INDICATION
Brake pedal: Slightly depressed	OFF
Brake pedal: Fully released	ON

Without CONSULT-III

Turn ignition switch ON.
Check voltage between ECM terminal 110 and ground under the following conditions.

M/T models

TERMINAL VOLTAGE REFERENCE CHART

CONDITION	VOLTAGE
Clutch pedal and/or brake pedal: Slightly depressed	Approximately 0 V
Clutch pedal and brake pedal: Fully released	Battery voltage

CVT models

TERMINAL VOLTAGE REFERENCE CHART

CONDITION	VOLTAGE
Brake pedal: Slightly depressed	Approximately 0 V
Brake pedal: Fully released	Battery voltage

Fig 1: Checking Voltage Between ECM Terminal 110 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 2.

NG: GO TO 3.

CHECK OVERALL FUNCTION-II

With CONSULT-III

Check "BRAKE SW2" indication in "DATA MONITOR" mode.

BRAKE SWITCH INDICATION CONDITION CHART

CONDITION	INDICATION
Brake pedal: Fully released	OFF
Brake pedal: Slightly depressed	ON

Without CONSULT-III

Check voltage between ECM terminal 106 and ground under the following conditions.

TERMINAL VOLTAGE REFERENCE CHART

CONDITION	VOLTAGE
Brake pedal: Fully released	Approximately 0 V
Brake pedal: Slightly depressed	Battery voltage

Fig 2: Checking Voltage Between ECM Terminal 106 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: INSPECTION END

NG: GO TO 11.

CHECK ASCD BRAKE SWITCH POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch (1) harness connector.
  - Stop lamp switch (2)
  - Brake pedal (3)
3. Turn ignition switch ON.
  
  Fig 3: Location Of ASCD Brake Switch, Stop Lamp Switch And Brake Pedal
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between ASCD brake switch terminal 1 and ground with CONSULT-III or tester.
  Voltage : Battery voltage
  
  Fig 4: Checking Voltage Between ASCD Switch Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 8.

NG (M/T models) : GO TO 4.

NG (CVT models): GO TO 6.
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.
  
  Fig 5: Location Of ASCD Clutch Switch Harness Connector And Clutch Pedal
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between ASCD clutch switch terminal 1 and ground with CONSULT-III or tester.
  Voltage: Battery voltage
  
  Fig 6: Checking Voltage Between ASCD Switch Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
  
  OK: GO TO 7.
  
  NG: GO TO 5.
DETECT MALFUNCTIONING PART
Check the following.
- 10A fuse
- Harness for open or short between ASCD clutch switch and fuse
  Repair open circuit or short to ground or short to power in harness or connectors.
DETECT MALFUNCTIONING PART
Check the following.
- 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.
CHECK ASCD CLUTCH SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between ASCD brake switch terminal 1 and ASCD clutch switch terminal 2.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist .
3. 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.
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 110 and ASCD brake switch terminal 2.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist .
4. Also check harness for short to ground and short to power.
OK or NG

OK: GO TO 9.

NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK ASCD BRAKE SWITCH
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 15.

NG: Replace ASCD brake switch. Refer to "REMOVAL AND INSTALLATION ".
CHECK ASCD CLUTCH SWITCH
Refer to "COMPONENT INSPECTION "

OK or NG

OK: GO TO 15.

NG: Replace ASCD clutch switch. Refer to "REMOVAL AND INSTALLATION ".
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch (2) harness connector.
  - ASCD brake switch (1)
  - Brake pedal (3)
  Fig 7: Location Of ASCD Brake Switch, Stop Lamp Switch And Brake Pedal
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-III or tester.
  
  Fig 8: Checking Voltage Between Stop Lamp Switch Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
Voltage: Battery voltage

OK or NG

OK: GO TO 13.

NG: GO TO 12.
DETECT MALFUNCTIONING PART
Check the following.
- 10A fuse
- Harness for open or short between stop lamp switch and battery
  Repair open circuit or short to ground or short to power in harness or connectors.
CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 106 and stop lamp switch terminal 2.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist .
3. Also check harness for short to ground and short to power.
  OK or NG
  
  OK: GO TO 14.
  
  NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK STOP LAMP SWITCH
Refer to "COMPONENT INSPECTION "

OK or NG

OK: GO TO 15.

NG: Replace stop lamp switch. Refer to "REMOVAL AND INSTALLATION ".
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

INSPECTION END