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Clutch Switch Circuit: Wiring Diagram

Fig 1: Identifying Clutch Switch Wiring Diagram
G04049204Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. INSPECT ECM (CLSW TERMINAL) 
    1. Disconnect the A5 connector from the ECM.
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

    Standard voltage 

    TESTER CONNECTION AND SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    A5-9 (CLSW) - Body ground Clutch pedal depressed Below 1 V
    Clutch pedal released 10 to 14 V

    NG : Go to step  2

    Fig 2: Disconnecting A5 Connector From ECM
    G04049205Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  2. INSPECT CLUTCH SWITCH 
    1. Turn the engine switch off.
    2. Disconnect the A21 connector from the clutch switch.
    3. Remove the clutch switch.
    4. Measure the resistance according to the value(s) in the table below.

    Standard resistance 

    TESTER CONNECTION AND SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    1 - 2 Switch pin free (Clutch pedal depressed) 10 kΩ or higher
    Switch pin pushed in (Clutch pedal released) Below 1Ω
    Fig 3: Inspecting Clutch Switch
    G04049206Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : REPLACE CLUTCH SWITCH 

    OK : Go To Next Step 

  3. CHECK HARNESS AND CONNECTOR (ECM - CLUTCH SWITCH) 
    1. Measure the resistance according to the value(s) in the table below.

    Standard resistance 

    TESTER CONNECTION AND SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    A5-9 (CLSW) - A21-2 Always Below 1Ω
    A5-9 (CLSW) - Body ground Always 10 kΩ or higher
    Fig 4: Checking Harness And Connector (ECM - Clutch Switch)
    G04049207Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - CLUTCH SWITCH)