Diagnostic Procedure

With CONSULT-II 

1. Turn ignition switch ON.
2. Select "BRAKE SW1" in "DATA MONITOR" mode with CONSULT-II.
3. Check "BRAKE SW1" indication under the following conditions.
   BRAKE PEDAL CONDITION CHART
   
   

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

   Fig 1: CONSULT-II Display - DATA MONITOR

   Courtesy of NISSAN NORTH AMERICA, INC.

Without CONSULT-II 

1. Turn ignition switch ON.
2. Check voltage between ECM terminal 108 and ground under the following conditions.
   BRAKE PEDAL CONDITION CHART
   
   

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

   Fig 2: Checking Voltage Between ECM Terminal 108 And Ground

   Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG 

OK: GO TO 2.

NG: GO TO  3.

With CONSULT-II 

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

Fig 3: CONSULT-II Display - DATA MONITOR

Courtesy of NISSAN NORTH AMERICA, INC.

Without CONSULT-II 

Check voltage between ECM terminal 101 and ground under the following conditions.

Fig 4: Checking Voltage Between ECM Terminal 101 And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG 

OK: INSPECTION END

NG: GO TO  8.

1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch (2) harness connector.
   • Stop lamp switch (1)
3. Turn ignition switch ON.
   Fig 5: Identifying ASCD Brake Switch And Stop Lamp Switch

   Courtesy of NISSAN NORTH AMERICA, INC.
4. Check voltage between ASCD brake switch terminal 1 and ground with CONSULT-II or tester.

   Voltage: Battery voltage 

OK or NG 

OK: GO TO  5.

NG: GO TO 4.

Fig 6: Checking Voltage Between ASCD Brake Switch Terminal 1 And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Check the following.

• Fuse block (J/B) connector E102
• 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.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 108 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  7.

NG: GO TO 6.

Check the following.

• Harness connectors E108, M15
• Harness for open or short between ECM and ASCD brake switch

  >> Repair open circuit or short to ground or short to power in harness or connectors.

Refer to "COMPONENT INSPECTION "

OK or NG 

OK: GO TO  13.

NG: Replace ASCD brake switch.

1. Turn ignition switch OFF.
2. Disconnect stop lamp switch (1) harness connector.
   • ASCD brake switch (2)
     Fig 7: Identifying ASCD Brake Switch And Stop Lamp Switch

     Courtesy of NISSAN NORTH AMERICA, INC.
3. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-II or tester.

   Voltage: Battery voltage 

OK or NG 

OK: GO TO  10.

NG: GO TO 9.

Fig 8: Checking Voltage Between Stop Lamp Switch Terminal 1 And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Check the following.

• Fuse block (J/B) connector E101
• 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.

1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 101 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  12.

NG: GO TO 11.

Check the following.

• Harness connectors E108, M15
• Harness for open or short between ECM and stop lamp switch

  >> Repair open circuit or short to ground or short to power in harness or connectors.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 13.

NG: Replace stop lamp switch.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

>> INSPECTION END