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Home >> Infiniti >> 2008 >> M45 Base >> Repair and Diagnosis >> Transmission >> Automatic Transmission >> A/T Indicator Circuit >> Diagnostic Procedure

Diagnostic Procedure

  1. CHECK INPUT SIGNALS 

    With CONSULT-III 

    1. Start engine.
    2. Select "MAIN SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-III and read out the value of "GEAR".
    3. Drive vehicle in the manual mode, and confirm that the actual gear position and the meter's indication of the position mutually coincide when the selector lever is shifted to the "+ (up)" or "- (down)" side (1st → 5th gear).

    OK or NG 

    OK: INSPECTION END 

    NG: Check the following.

A/T INDICATOR SYMPTOM CHART 

A/T INDICATOR SYMPTOM CHART

Items Possible location of malfunction
The actual gear position does not change, or shifting into the manual mode is not possible (no gear shifting in the manual mode possible).
The A/T indicator is not indicated.
Manual mode switch
Refer to "DTC P1815 MANUAL MODE SWITCH ". A/T main system (Fail-safe function actuated)
The actual gear position changes, but the A/T indicator is not indicated. Perform the self-diagnosis function.
The actual gear position and the indication on the A/T indicator do not coincide. Perform the self-diagnosis function.
Only a specific position or positions is/are not indicated on the A/T indicator. Check the unified meter and A/C amp.
Refer to "COMBINATION METERS ".