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Home >> Toyota >> 2004 >> MR2 C65M >> Repair and Diagnosis >> Transmission >> Manual Trans >> Manual Trans Sequential - Diagnostics >> Transmission Shift Switch Circuit >> Inspection Procedure
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Inspection Procedure

  1. Check operation of transmission shift switch. 

    PREPARATION: 

    1. Turn the ignition switch ON.
    2. Shift the shift lever into the S position.

    CHECK: 

    Check the gear shift indicator when the transmission shift switch is pressed.

    OK: 

    TRANSMISSION SHIFT SWITCH CONDITION

    Switch Condition Odo Trip Display Panel
    UP switch pressed Up-shift 1 gear position
    DOWN switch pressed Down-shift 1 gear position
    Fig 1: Inspecting Gear Position Indicator Procedure
    G02914124Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   3 
    2. OK: Go to next step 
  2. Check harness and connector between battery and transmission control ECU, transmission control ECU and combination meter ( PROCEDURE  ). 
    1. NG: Repair or replace harness and connector. 
    2. OK: Replace transmission control ECU ( PROCEDURE  ). 
  3. Inspect transmission shift switch. 

    PREPARATION: 

    1. Remove the steering wheel pad.
    2. Disconnect the transmission shift switch connector.

    CHECK: 

    Check continuity between each terminal of transmission shift switch connector.

    OK: 

    TRANSMISSION SHIFT SWITCH CONDITION

    Switch Condition Tester Connection Specified Condition
    UP switch pressed 3 - 5 Continuity
    UP switch released 3 - 5 No continuity
    DOWN switch pressed 3 - 6 Continuity
    DOWN switch released 3 - 6 No continuity
    Fig 2: Checking Continuity Between Transmission Shift Switch Connector
    G02914125Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Replace the steering wheel. 
    2. OK: Check and replace combination meter ( COMBINATION METER  ).