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Home >> Nissan-Datsun >> 2005 >> Sentra SE-R >> Repair and Diagnosis >> Transmission >> Automatic Transmission (Re4F04B) >> A/T Shift Lock System >> Diagnostic Procedure
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Diagnostic Procedure

SYMPTOM 1: 

SYMPTOM 2: 

Ignition key cannot be removed when selector lever is set to "P" position. It can be removed when selector lever is set to any position except "P". 

  1. CHECK KEY INTERLOCK CABLE 

    Check key interlock cable for damage.

    OK or NG 

    1. OK : GO TO  2.
    2. NG : Repair key interlock cable. Refer to COMPONENTS .
  2. CHECK SELECTOR LEVER POSITION 

    Check selector lever position for damage.

    OK or NG 

    1. OK: GO TO  3.
    2. NG: Check selector lever. Refer to CONTROL CABLE ADJUSTMENT .
  3. CHECK POWER SOURCE 

    Turn ignition switch to "ON" position.

    (Do not start engine.)

    • Check voltage between A/T device harness connector M44 terminal 7 (G) and ground.
      1. Voltage: 
        1. Brake pedal depressed: Battery voltage 
        2. Brake pedal released: 0 V 

    OK or NG 

    1. OK: GO TO  5.
    2. NG: GO TO  4.
    Fig 1: Checking Voltage Between A/T Device Harness Connector M44 Terminal 7 (G) & Ground
    G02456153Courtesy of NISSAN MOTOR CO., U.S.A.
  4. DETECT MALFUNCTIONING ITEM 

    Check the following items.

    1. Harness for open or short between fuse block (J/B) connector M1 terminal 12K and stop lamp switch harness connector M26 terminal 3.
    2. Harness for open or short stop lamp switch harness connector M26 terminal 3. 10A fuse [10, located in the fuse block (J/B)].
    3. Check continuity between stop lamp switch harness connector M26 terminals 3 (G) and 4 (G).
      CONTINUITY SPECIFICATIONS

      Condition Continuity
      When brake pedal is depressed Yes
      When brake pedal is released No

      Check stop lamp switch after adjusting brake pedal; refer to STOP LAMP SWITCH AND ASCD CANCEL SWITCH CLEARANCE .

      Fig 2: Checking Continuity Between Stop Lamp Switch Harness Connector M26 Terminals 3 (G) & 4 (G)
      G02456154Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  5.
    2. NG: Repair or replace damaged parts.
  5. CHECK GROUND CIRCUIT 
    1. Turn ignition switch to "OFF" position.
    2. Disconnect A/T device harness connector.
    3. Check continuity between A/T device harness M44 terminal 6 (B) and ground.
      1. Continuity should exist 

      Continuity should exist.

      If OK, check harness for short to power.

    OK or NG 

    1. OK: GO TO  6.
    2. NG: Repair open circuit in harness.
    Fig 3: Checking Continuity Between A/T Device Harness M44 Terminal 6 (B) & Ground
    G02456155Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK PARK POSITION SWITCH 

    Check continuity between A/T device harness connector M44 terminals 6 (B) and 7 (G).

    CONTINUITY SPECIFICATIONS

    Selector lever position Continuity
    "P" position Yes
    Other position No

    OK or NG 

    1. OK: GO TO  7.
    2. NG: Replace park position switch.
    Fig 4: Checking Continuity Between A/T Device Harness Connector M44 Terminals 6 (B) & 7 (G)
    G02456156Courtesy of NISSAN MOTOR CO., U.S.A.
  7. CHECK SHIFT LOCK SOLENOID 
    1. Connect A/T device harness connector.
    2. Turn ignition switch to "ON" position.
    3. Check operation sound.
    Fig 5: Brake Pedal Operation Chart
    G02456157Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  8.
    2. NG: Replace shift lock solenoid.
  8. CHECK SHIFT LOCK OPERATION 
    1. Reconnect shift lock harness connector.
    2. Turn ignition switch from "OFF" to "ON" position. (Do not start engine.)
    3. Recheck shift lock operation.

    OK or NG 

    1. OK: INSPECTION END
    2. NG: GO TO  9.
  9. CHECK A/T DEVICE INSPECTION 
    1. Perform A/T device input/output signal inspection test.
    2. If NG, recheck harness connector connection.

    OK or NG 

    1. OK: INSPECTION END
    2. NG: Repair or replace damaged parts.