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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 2064 (Continuously Variable Transmission (CVT)) >> DTC P1701 Transmission Control Module (Power Supply) >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC 
    1. Turn ignition switch ON. (Do not start engine.)
    2. Select "SELF-DIAG RESULTS" mode for "TRANSMISSION" with CONSULT-III.
    3. Erase self-diagnostic results. Refer to "HOW TO ERASE DTC ".
    4. Turn ignition switch OFF, and wait for 5 seconds or more.
    5. Start engine.
    6. Confirm self-diagnostic results again. Refer to "SELF-DIAGNOSTIC RESULT MODE ".

    Is the "P1701 TCM-POWER SUPPLY" displayed? 

    Yes: GO TO  2.

    NO: INSPECTION END 

  2. CHECK TCM POWER SOURCE, STEP 1 
    1. Turn ignition switch OFF.
    2. Check voltage between TCM connector terminal and ground.
      VOLTAGE REFERENCE CHART

      Name Connector Terminal Condition Voltage (Approx.)
      Power supply (memory backup) F57 28 - Ground Always Battery voltage
      Fig 1: Checking Voltage Between TCM Connector Terminal And Ground
      G04916174Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  3.

    NG: GO TO  4.

  3. CHECK TCM POWER SOURCE, STEP 2 
    1. Turn ignition switch ON. (Do not start engine.)
    2. Check voltage between TCM connector terminals and ground.
      VOLTAGE REFERENCE CHART

      Name Connector Terminal Condition Voltage (Approx.)
      Power supply F56 10 - Ground
      G04916175Courtesy of NISSAN MOTOR CO., U.S.A.
      		 Battery voltage
      G04916176Courtesy of NISSAN MOTOR CO., U.S.A.
      		 0 V
      Power supply 19 - Ground
      G04916177Courtesy of NISSAN MOTOR CO., U.S.A.
      		 Battery voltage
      G04916178Courtesy of NISSAN MOTOR CO., U.S.A.
      		 0 V
      Power supply (memory back-up) F57 28 - Ground Always Battery voltage
      Fig 2: Checking Voltage Between TCM Connector Terminal And Ground
      G04916179Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  5.

    NG: GO TO  4.

  4. DETECT MALFUNCTIONING ITEM 

    Check the following.

    • Harness for short or open between battery and TCM connector terminal 28
    • Harness for short or open between ignition switch and TCM connector terminal 10, 19
    • 15 A fuse (No.35, located in the IPDM E/R) and 10 A fuse(No.48, located in the IPDM E/R)
    • Ignition switch. Refer to "POWER SUPPLY ROUTING CIRCUIT ".

    OK or NG 

    OK: GO TO  5.

    NG: Repair or replace damaged parts.

  5. CHECK TCM GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect TCM connector.
    3. Check continuity between TCM connector terminals and ground.
      TCM CONNECTOR TERMINALS AND GROUND

      Name Connector Terminal Continuity
      Ground F57 25 Yes
      48
      Fig 3: Checking Continuity Between TCM Connector Terminals And Ground
      G04916180Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  6.

    NG: Repair open circuit or short to ground or short to power in harness or connectors.

  6. CHECK DTC 

    Check again. Refer to "DIAGNOSTIC PROCEDURE ".

    OK or NG 

    OK: INSPECTION END 

    NG: GO TO  7.

  7. CHECK TCM 
    1. Check TCM input/output signals. Refer to "TCM INPUT/OUTPUT SIGNAL REFERENCE VALUES ".
    2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.

    OK or NG 

    OK: INSPECTION END 

    NG: Repair or replace damaged parts.

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