A/T Models

1. 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.
   DATA MONITOR MODE REFERENCE
   
   

   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.
   VOLTAGE SPECIFICATION
   
   

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

   Fig 1: Checking Voltage Between ECM Terminal 108 (ASCD Brake Switch Signal) And Ground

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

   OK or NG 

   OK: INSPECTION END.

   NG: GO TO 2.

2. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
   1. Turn ignition switch OFF.
   2. Disconnect ASCD brake switch harness connector.
   3. Turn ignition switch ON.
      Fig 2: Identifying ASCD Brake Switch And Stop Lamp Switch

      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 

   OK or NG 

   OK: GO TO  4.

   NG: GO TO 3.

   Fig 3: Checking Voltage Between ASCD Brake Switch Terminal 1 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. DETECT MALFUNCTIONING PART

   Check the following.

   • Fuse block (J/B) connector E160
   • 10A fuse (No. 12)
   • Harness for open or short between ASCD brake switch and fuse

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

4. 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 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 5.

   NG: Repair open circuit, short to ground or short to power in harness or connectors.

5. CHECK ASCD BRAKE SWITCH

   Refer to "COMPONENT INSPECTION ".

   OK or NG 

   OK: GO TO 6.

   NG: Replace ASCD brake switch.

6. CHECK INTERMITTENT INCIDENT

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END