Diagnostic Procedure

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.
   BRAKE PEDAL CONDITION CHART
   
   

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

Without CONSULT-III 

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

OK or NG 

OK: GO TO 2.

NG: GO TO  3.

Fig 1: Checking Voltage Between ECM Terminal 108 And Ground

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

With CONSULT-III 

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

Without CONSULT-III 

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

Fig 2: Checking Voltage Between ECM Terminal 101 And Ground

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

OK or NG 

OK: INSPECTION END 

NG: GO TO  8.

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

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between ICC brake switch terminal 1 and ground with CONSULT-III or tester.

   Voltage: Battery voltage 

OK or NG 

OK: GO TO  5.

NG: GO TO 4.

Fig 4: Checking Voltage Between ICC Brake Switch Terminal 1 And Ground

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

Check the following.

• Fuse block (J/B) connector E102
• 10A fuse
• Harness for open or short between ICC 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 ICC brake switch terminal 2 and ECM terminal 108.

   Refer 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 ICC brake switch and ECM

  >> 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  15.

NG: Replace ICC brake switch.

Refer to TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS .

OK or NG 

OK: GO TO 9.

NG: Repair or replace.

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

     Courtesy of NISSAN MOTOR CO., U.S.A.
3. Disconnect ICC brake hold relay (1) harness connector.
   • ← : Vehicle front
     Fig 6: Identifying ICC Brake Hold Relay Harness Connector.

     Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-III or tester.

   Voltage: Battery voltage 

   Fig 7: Checking Voltage Between Stop Lamp Switch Terminal 1 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Check voltage between ICC brake hold relay terminal 3 and ground with CONSULT-III or tester.

   Voltage: Battery voltage 

OK or NG 

OK: GO TO  11.

NG: GO TO 10.

Fig 8: Checking Voltage Between ICC Brake Hold Relay Terminal 3 And Ground

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

Check the following.

• Fuse block (J/B) connector E101
• 10A fuse
• Harness for open or short between battery and stop lamp switch
• Harness for open or short between battery and ICC brake hold relay

  >> 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 the following;

   ECM terminal 101 and stop lamp switch terminal 2,

   ECM terminal 101 and ICC brake hold relay terminal 5.

   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  13.

NG: GO TO 12.

Check the following.

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

  >> 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 14.

NG: Replace stop lamp switch.

Refer to "COMPONENT INSPECTION ".

OK: GO TO 15  .

NG: Replace ICC brake hold relay.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

>> INSPECTION END