Transmission Control Module (TCM) Repair Procedures

Removal

When replacing the TCM on a vehicle equipped with an immobilizer, perform the procedure below. [When installing a used TCM] 1 Perform the "TCM Neutral Mode" procedure using GDS. (Refer to Body Electrical System - "Immobilizer System") 2 After completing the "TCM Neutral Mode", perform the "Key Learning" procedure using GDS. (Refer to Body Electrical System - "Immobilizer System") [When installing a new TCM] Perform the "Key Learning" procedure using GDS. (Refer to Body Electrical System - "Immobilizer System")

When replacing the TCM on a vehicle equipped with a Smart Key System (Push Button Start), perform the procedure below. [When installing a used TCM] 1 Perform the "TCM Neutral Mode" procedure using GDS. (Refer to Body Electrical System - "Immobilizer System") 2 After completing the "TCM Neutral Mode", insert the key (or press the start button) and turn it to IGN ON and OFF. The TCM then automatically learns the Smart Key information. [When installing a new TCM] Insert the key (or press the start button) and turn it to IGN ON and OFF. The TCM then automatically learns the Smart Key information.

1. 1
   Turn the ignition switch OFF and disconnect the negative (-) battery cable.
2. 2
   Remove the battery. (Refer to Engine Electrical System - "Battery")
3. 3
   Remove the air cleaner assembly. (Refer to Engine Mechanical System - "Air Cleaner")
4. 4
   Disconnect the TCM connector (A).

   

5. 5
   Remove the mounting bolts (A) and nut (B), then remove the TCM (C).

   

Installation

When replacing the TCM on a vehicle equipped with an immobilizer, perform the procedure below. [When installing a used TCM] 1 Perform the "TCM Neutral Mode" procedure using GDS. (Refer to Body Electrical System - "Immobilizer System") 2 After completing the "TCM Neutral Mode", perform the "Key Learning" procedure using GDS. (Refer to Body Electrical System - "Immobilizer System") [When installing a new TCM] Perform the "Key Learning" procedure using GDS. (Refer to Body Electrical System - "Immobilizer System")

When replacing the TCM on a vehicle equipped with a Smart Key System (Push Button Start), perform the procedure below. [When installing a used TCM] 1 Perform the "TCM Neutral Mode" procedure using GDS. (Refer to Body Electrical System - "Immobilizer System") 2 After completing the "TCM Neutral Mode", insert the key (or press the start button) and turn it to IGN ON and OFF. The TCM then automatically learns the Smart Key information. [When installing a new TCM] Insert the key (or press the start button) and turn it to IGN ON and OFF. The TCM then automatically learns the Smart Key information.

1. 1
   Install in the reverse order of removal. TCM mounting bolt: 9.8 ~ 11.8 N·m TCM bracket mounting bolt/nut: 9.8 ~ 11.8 N·m

   Perform TCM learning after replacing the transmission to prevent slow shift response, acceleration jerk, and start jerk (refer to "Automatic Transmission Control System - Repair Procedures").

2. 2
   TCM GROUND CIRCUIT INSPECTION: Measure the resistance between the TCM and chassis ground using the rear side of the TCM harness connector as the TCM side test point. If a problem is found, repair it.

   Specification: Below 1 Ω

3. 3
   TCM CONNECTOR INSPECTION: Disconnect the TCM connector and visually inspect the ground terminals on the TCM side and harness side for bent pins or poor contact pressure. If a problem is found, repair it.
4. 4
   If no problem is found in steps 1 and 2, the TCM may be faulty. If so, before replacing the TCM, make sure there are no DTCs, then replace the TCM with a new one and recheck the vehicle. If DTCs were detected, check them first before replacing the TCM.
5. 5
   RECHECK ORIGINAL TCM: Install the original TCM (which may be faulty) into a known good vehicle and check the vehicle. If the problem recurs, replace the original TCM with a new one. If the problem does not occur, the problem is intermittent (refer to the "Problem Verification Procedure" in the "Basic Diagnostic Procedure" section).