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Home >> Infiniti >> 2017 >> QX30 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (4 Of 5) >> DTC/Circuit Diagnosis >> DTC P0702: Transmission Control System >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK SELF-DIAGNOSTIC RESULT

    G-20 With CONSULT

    1. Perform "All DTC reading".
    2. Check DTC of "TRANSMISSION".

    Is the DTC related to "communication error with ECM" detected?

    YES 

    GO TO STEP 2  .

    NO 

    Replace ECM. Refer to REMOVAL AND INSTALLATION .

  2. CHECK HARNESS AND CONNECTORS FOR CAN COMMUNICATION

    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Disconnect TCM harness connector.
    4. Check the continuity between ECM harness connector and TCM harness connector.
      + - Continuity
      ECM TCM
      Connector Terminal Connector Terminal
      E48 138 E47 3 Existed
      151 1
    5. Also check harness for short to battery and short to ground.

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair or replace error-detected parts.

  3. REPLACE ECM

    G-20 With CONSULT

    1. Replace ECM. Refer to REMOVAL AND INSTALLATION .
    2. Turn ignition switch ON and wait at least 5 seconds.
    3. Check "Self-diagnostic result" of "ENGINE".

    Is DTC "P0702" detected again?

    YES 

    Replace TCM. Refer to REMOVAL AND INSTALLATION .

    NO 

    INSPECTION END