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Home >> Infiniti >> 2004 >> QX56 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1218 (Brake Control System) >> Trouble Diagnosis For Self-Diagnostic Items >> Actuator Motor, Motor Relay, and Circuit Inspection

Actuator Motor, Motor Relay, and Circuit Inspection

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

INSPECTION PROCEDURE

  1. CHECKING SELF-DIAGNOSIS RESULTS 

    Check self-diagnosis results.

    ACTUATOR MOTOR, MOTOR RELAY AND CIRCUIT - SELF-DIAGNOSIS RESULTS

    Self-diagnosis results
    CONSULT-II display items
    PUMP MOTOR
    ACTR RELAY CIRCUIT

    Is the above displayed in the self-diagnosis display items? 

    1. YES: GO TO 2.
    2. NO: Inspection End.
  2. CONNECTOR INSPECTION 
    1. Disconnect ABS actuator and electric unit (control unit) connector E125.
    2. Check the terminals for deformation, disconnection, looseness or damage.

    OK or NG 

    1. OK: GO TO 3.
    2. NG: Repair or replace as necessary.
  3. CHECKING ABS MOTOR AND MOTOR RELAY POWER SYSTEM 
    1. Check voltage between ABS actuator and electric unit (control unit) harness connector E125 and body ground.
      ABS ACTUATOR AND ELECTRIC UNIT - VOLTAGE SPECIFICATION

      ABS actuator and electric unit (control unit) connector E125  Body ground  Measured value (Approx.) 
      1 (Y)  -  12V 
      Fig 1: Checking Voltage Between ABS Actuator And Electric Unit (Control Unit) Harness Connector E125 And Body Ground
      G02385037Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Check resistance between ABS actuator and electric unit (control unit) connector E125 and body ground.
      ABS ACTUATOR AND ELECTRIC UNIT - RESISTANCE SPECIFICATION

      ABS actuator and electric unit (control unit) harness connector E125  Body ground  Measured value Ω (Approx.) 
      16 (B)  -  0Ω 
      47 (B)  -  0Ω 
      Fig 2: Checking Resistance Between ABS Actuator And Electric Unit (Control Unit) Connector E125 And Body Ground
      G02385038Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: Perform self-diagnosis again. If the same results appear, replace ABS actuator and electric unit (control unit). Refer to "REMOVAL AND INSTALLATION ".
    2. NG: Repair the circuit.