1.CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

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 | Ground | Voltage
   Connector | Terminal
   E109 | 1 | Ground | Battery voltage

Is the inspection result normal?
YES>>GO TO 3.
NO>>GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.

- Fuse block (J/B) connector E103
- 10A fuse (No. 3)
- Harness for open or short between ASCD brake switch and fuse

>>Repair open circuit or short to ground in harness or connectors.
3.CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

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

   ASCD brake switch | ECM | Continuity
   Connector | Terminal | Connector | Terminal
   E109 | 2 | M107 | 117 | 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.
4.DETECT MALFUNCTIONING PART
Check the following.

- Harness connectors E106, M6
- 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.
5.CHECK ASCD BRAKE SWITCH
Refer to Component Inspection (ASCD Brake Switch) (GT-R certified NISSAN dealer) .
Is the inspection result normal?
YES>>GO TO 6.
NO>>Replace ASCD brake switch.
6.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
>>INSPECTION END