Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect ASCD brake switch harness connector.
Turn ignition switch ON.

Check the voltage between ASCD brake switch harness connector and ground.

VOLTAGE SPECIFICATION

ASCD brake switch		Ground	Voltage
Connector	Terminal	Ground	Voltage
E37	1	Ground	Battery voltage

Fig 1: Checking Voltage Between ASCD Brake Switch Harness Connector And Ground

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

Is the inspection result normal?

YES: GO TO 3.

NO: GO TO 2.

DETECT MALFUNCTIONING PART
Check the following.
- Fuse block (J/B) connector E6
- Junction block connectors E44, E46
- 10 A fuse (No. 3)
- 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.

CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between ASCD brake switch harness connector and ECM harness connector.

CONTINUITY CHART

ASCD brake switch		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E37	2	E10	110	Existed

Also check harness for short to ground and short to power.
Is the inspection result normal?

YES: GO TO 5.

NO: GO TO 4.

DETECT MALFUNCTIONING PART
Check the following.
- Junction block connectors E45, E46
- Harness for open or short between ASCD brake switch and ECM
: Repair open circuit, short to ground or short to power in harness or connectors.
CHECK ASCD BRAKE SWITCH
Refer to "COMPONENT INSPECTION (ASCD BRAKE SWITCH) ".

Is the inspection result normal?

YES: GO TO 6.

NO: Replace ASCD brake switch.
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

: INSPECTION END