LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2004 >> MR2 C56 >> Repair and Diagnosis >> Transmission >> Manual Trans >> Manual Trans Sequential - Diagnostics >> Transmission Control Ecu Power Source >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

  1. Check battery positive voltage. 

    OK: 

    1. Voltage: 10 -14 V 
    1. NG: Check charging system. 
    2. OK: Go to next step 
  2. Inspect SMT-B fuse. 

    PREPARATION: 

    Remove SMT-B fuse from the FL Block and J/B No. 1.

    CHECK: 

    Check continuity of SMT-B fuse.

    OK: 

    1. Continuity 
    Fig 1: Removing SMT-B Fuse From FL Block And J/B No. 1
    G02914121Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Check for short in wire harness related to SMT-B fuse ( PROCEDURE  ). 
    2. OK: Go to next step 
  3. Check wire harness and connectors between transmission control ECU and battery ( PROCEDURE  ). 
    1. NG: Repair or replace wire harness and connector. 
    2. OK: Replace transmission control ECU ( PROCEDURE  ).