Nissan Maxima Service and Repair Manual: Additional service when replacing TCM

Description

When replacing the TCM, perform the following work.

TCM PROGRAMMING

  •  Since vehicle specifications are not yet written in a new TCM, it is necessary to write them with CONSULT.

CAUTION:

When replacing TCM, save TCM data on CONSULT before removing TCM.

LOADING AND STORING OF CALIBRATION DATA

  •  The TCM acquires calibration data (individual characteristic value) of each solenoid that is stored in the ROM assembly (in the control valve). This enables the TCM to perform accurate control. After the TCM is replaced, check that the calibration data is correctly loaded and stored.

CAUTION:

When replacing TCM and transaxle assembly as a set, replace transaxle assembly first and then replace TCM.

If the TCM is replaced in advance, perform "ADDITIONAL SERVICE WHEN REPLACING TRANSAXLE ASSEMBLY". Refer to TM-10, "Description".

Procedure

CAUTION:

Immediately after TCM is replaced or after control valve or transaxle assembly is replaced (after TCM initialization is complete), self-diagnosis result of "P1701", "P1709" may be displayed. In this case, erase self-diagnosis result using CONSULT. After erasing self-diagnosis result, perform DTC P1701 reproduction procedure and check that malfunction is not detected. Refer to TM-95, "DTC Logic" (P1701), TM-99, "DTC Logic" (P1709).

1.CHECK TCM PART NUMBER

Check TCM part number to see whether it is blank TCM or not.

NOTE:

  •  Part number of blank TCM is 310F6-XXXXX.
  •  Check the part number when ordering TCM or with the one included in the label on the container box.

2.SAVING TCM DATA

With CONSULT

  •  Turn ignition switch OFF.
  •  Turn ignition switch ON.
  •  Select "Re/programming, Configuration".
  •  Select "AT/CVT".

    NOTE: If "AT/CVT" is not displayed and TCM data cannot be saved on CONSULT, GO TO 3.

  •  Select "Programming".
  •  Save TCM data on CONSULT according to the CONSULT display.

3.REPLACE TCM

Replace TCM. Refer to TM-168, "Removal and Installation".

4.LOAD CALIBRATION DATA

  1.  Shift the selector lever to the "P" position.
  2.  Turn ignition switch ON.
  3.  Check that "P" is displayed on shift position indicator on combination meter.

    NOTE: Displayed approximately 1 - 2 seconds after the selector lever is moved to the "P" position.

5.DETECT MALFUNCTIONING ITEM

Check the following items:

  •  Harness between the TCM and the ROM assembly inside the transaxle assembly is open or shorted.
  •  Disconnected, loose, bent, collapsed, or otherwise abnormal connector housing terminals

6.STORE CALIBRATION DATA

  1.  Turn ignition switch OFF and wait for 5 seconds.
  2.  Turn ignition switch ON.

7.PROGRAMMING

With CONSULT

  1.  Select "Programming".
  2.  Perform programming according to the CONSULT display.
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