Diagnostic Procedure

Inspection Start
ABS motor relay inspection

Fig 1: ABS Motor Relay Circuit Diagram
Courtesy of NISSAN MOTOR CO., U.S.A.

: GO TO 2.
Check Motor Power Supply Circuit
Check 40A [D] fusible link (ABS MTR) for ABS motor relay. For fusible link layout, refer to FUSES & CIRCUIT BREAKERS .

Is fusible link OK?

Yes: GO TO 3.

No: GO TO 6 .
Check Connector
1. Disconnect ABS actuator and electric unit (control unit) connector E162. Check terminals for damage or loose connection. Then reconnect connectors.
2. Carry out self-diagnosis again.
Does warning lamp activate again?

Yes: GO TO 4.

No: Inspection End
Check Motor Relay Power Supply Circuit
1. Disconnect ABS actuator and electric unit (control unit) connector E162.
2. Check voltage between ABS actuator and electric unit (control unit) harness connector E162 terminal 15 (GY) and 17 (Y) and ground.
  
  Fig 2: Checking Motor Relay Power Supply Voltage
  Courtesy of NISSAN MOTOR CO., U.S.A.
Does battery voltage exist?

Yes: GO TO 5.

No: Check the following.
- Harness connector E162
- Harness for open or short between ABS actuator and electric unit (control unit) and fusible link
  If NG, repair harness or connectors.
Check ABS Actuator And Electric Unit (Control Unit) Ground Circuit
Refer to ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND in Ground Circuit Check.

Is ground circuit OK?

Yes: Replace ABS actuator and electric unit (control unit).

No: Check the following.
- Harness connector E162
- Harness for open or short between ABS actuator and electric unit (control unit) and ground
  If NG, repair harness or connectors.
Replace Fusible Link
Replace fusible link.

Does the fusible link blow out when ignition switch is turned "ON"?

Yes: GO TO 7.

No: Inspection End
Check ABS Actuator Motor Power Supply Circuit
1. Disconnect battery cable and ABS actuator and electric unit (control unit) connector E162.
2. Check continuity between ABS actuator and electric unit (control unit) harness connector E162 terminal 15 (GY) and 17 (Y) and ground.
Fig 3: Checking ABS Actuator Motor Power Supply Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.

Does continuity exist?

Yes: Check the following.
- Harness connector E162
- Harness for open or short between ABS actuator and electric unit (control unit) and fusible link
  If NG, repair harness or connectors.
No: Check ABS actuator and electric unit (control unit) connector E162 pin terminals for damage or the connection of ABS actuator and electric unit (control unit) harness connector E 162. Reconnect ABS actuator and electric unit (control unit) harness connector E162. Then retest.