Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ASCD brake switch harness connector and ground.
   ASCD BRAKE SWITCH VOLTAGE CHART
   
   

   ASCD brake switch		Ground	Voltage
   Connector	Terminal
   E109	1	Ground	Battery voltage

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

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

   Is the inspection result normal? 

   YES: GO TO  3.

   NO: GO TO 2.

Check the following.

• Fuse block (J/B) connector E102
• 10 A fuse (No. 12)
• Harness for open or short between ASCD brake switch and fuse

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

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ASCD brake switch harness connector and ECM harness connector.
   CONNECTOR TERMINAL CONTINUITY CHART
   
   

   ASCD brake switch		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E109	2	M9	126	Existed

4. Also check harness for short to ground and short to power.

   Is the inspection result normal? 

   YES: GO TO  5.

   NO: GO TO 4.

Check the following.

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

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

Refer to "COMPONENT INSPECTION (ASCD BRAKE SWITCH) "

Is the inspection result normal? 

YES: GO TO 6.

NO: Replace ASCD brake switch.

Refer to "DESCRIPTION ".

INSPECTION END