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Home >> Nissan-Datsun >> 2013 >> Sentra SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Security Control System (With Intelligent Key System) (DTCS)) >> DTC/Circuit Diagnosis >> DTC B2603: Shift Position >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different car, the 2017 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

  1. INSPECTION START

    Perform inspection in accordance with procedure that confirms DTC.

    Which procedure confirms DTC?

    DTC confirmation procedure 1 

    GO TO STEP 2  .

    DTC confirmation procedure 2 

    GO TO STEP   8  .

  2. CHECK FUSE

    1. Turn power switch OFF.
    2. Check that the following fuse in IPDM E/R is not blown.
      Signal name Fuse No.
      Ignition power supply 46 (10 A)

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Replace the blown fuse after repairing the cause of blowing.

  3. CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY

    1. Disconnect transmission range switch connector.
    2. Turn ignition switch ON.
    3. Check voltage between transmission range switch harness connector and ground.
      (+) (-) Voltage (V)
      (Approx.)
      Transmission range switch
      Connector Terminal
      F26 7 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    GO TO STEP 4  .

  4. CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R connector.
    3. Check continuity between transmission range switch harness connector and IPDM E/R harness connector.
      Transmission range switch IPDM E/R Continuity
      Connector Terminal Connector Terminal
      F26 7 E43 14 Yes

    Is the inspection result normal?

    YES 

    Replace IPDM E/R. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness.

  5. CHECK BCM INPUT SIGNAL

    1. Turn ignition switch OFF.
    2. Connect transmission range switch harness connector.
    3. Turn ignition switch ON.
    4. Check voltage between BCM harness connector and ground.
      (+) (-) Condition Voltage (V)
      (Approx.)
      BCM
      Connector Terminal
      M83 69 Ground Selector lever P or N position Battery voltage
      Other than above 0

    Is the inspection result normal?

    YES 

    GO TO STEP   13  .

    NO 

    GO TO STEP 6  .

  6. CHECK BCM INPUT SIGNAL CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect transmission range switch connector.
    3. Disconnect BCM connector.
    4. Check continuity between transmission range switch harness connector and BCM harness connector.
      Transmission range switch BCM Continuity
      Connector Terminal Connector Terminal
      F26 10 M83 69 Yes

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Repair or replace harness.

  7. CHECK TRANSMISSION RANGE SWITCH

    Refer to COMPONENT INSPECTION (TRANSMISSION RANGE SWITCH) .

    Is the inspection result normal?

    YES 

    GO TO STEP   12  .

    NO 

    Replace transmission range switch.

  8. CHECK CVT SHIFT SELECTOR POWER SUPPLY

    1. Turn ignition switch OFF.
    2. Disconnect CVT shift selector (park position switch) connector.
    3. Turn ignition switch ON.
    4. Check voltage between CVT shift selector (park position switch) harness connector and ground.
      (+) (-) Voltage (V)
      (Approx.)
      CVT shift selector (park position switch)
      Connector Terminal
      M38 12 Ground 12

    Is the inspection result normal?

    YES 

    GO TO STEP 10  .

    NO 

    GO TO STEP 9  .

  9. CHECK CVT SHIFT SELECTOR POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect BCM connector.
    3. Check continuity between CVT shift selector (park position switch) harness connector and BCM harness connector.
      CVT shift selector (park position switch) BCM Continuity
      Connector Terminal Connector Terminal
      M38 12 M83 67 Yes
    4. Check continuity between CVT shift selector (park position switch) harness connector and ground.
      CVT shift selector (park position switch) Ground Continuity
      Connector Terminal
      M38 12 No

    Is the inspection result normal?

    YES 

    GO TO STEP 12  .

    NO 

    Repair or replace harness.

  10. CHECK CVT SHIFT SELECTOR CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect BCM connector.
    3. Check continuity between CVT shift selector (park position switch) harness connector and BCM harness connector.
      CVT shift selector (park position switch) BCM Continuity
      Connector Terminal Connector Terminal
      M38 13 M84 37 Yes
    4. Check continuity between CVT shift selector (park position switch) harness connector and ground.
      CVT shift selector (park position switch) Ground Continuity
      Connector Terminal
      M38 13 No

    Is the inspection result normal?

    YES 

    GO TO STEP 11  .

    NO 

    Repair or replace harness.

  11. CHECK CVT SHIFT SELECTOR (PARK POSITION SWITCH)

    Refer to COMPONENT INSPECTION [CVT SHIFT SELECTOR (PARK POSITION SWITCH)] .

    Is the inspection result normal?

    YES 

    GO TO STEP 13  .

    NO 

    Replace CVT shift selector. Refer to REMOVAL AND INSTALLATION .

  12. CHECK INTERMITTENT INCIDENT

    Refer to INTERMITTENT INCIDENT .

    Inspection End.

  13. REPLACE BCM

    1. Replace BCM. Refer to REMOVAL AND INSTALLATION .
    2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT.

    Inspection End.

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