ECD SYSTEM, Diagnostic DTC:P0704

DTC Code DTC Name
P0704 Clutch Switch Input Circuit

DESCRIPTION

The clutch switch is mounted on the clutch pedal. The switch is turned off when depressing the clutch pedal, and transmits a signal to the ECM.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0704

Clutch Switch Input Circuit

No clutch switch signals to ECM despite gears being shifted.

(3 trip detection logic)

  • Open or short in clutch start switch assembly circuit

  • Clutch start switch assembly

  • ECM

Does not come on

DTC stored

WIRING DIAGRAM

A311429E04

CAUTION / NOTICE / HINT

Note:

  • When replacing the ECM, the ECM needs registration and initialization.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tip:

  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE

  1. CHECK CLUTCH START SWITCH ASSEMBLY

    1. Check the clutch start switch assembly installation.

      OK

      Clutch start switch assembly is installed correctly.

    Result

    Proceed to

    OK

    NG
    NG

    SECURELY REINSTALL CLUTCH START SWITCH ASSEMBLYClick here

    OK

  2. INSPECT CLUTCH START SWITCH ASSEMBLY

    1. Inspect the clutch start switch assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE CLUTCH START SWITCH ASSEMBLYClick here

    OK

  3. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - ECM)

    1. Disconnect the clutch start switch assembly connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (for LHD)

      Tester Connection

      Condition

      Specified Condition

      A87-2 - A62-7 (D)

      Always

      Below 1 Ω

      A87-2 or A62-7 (D) - Body ground

      Always

      10 kΩ or higher

      Standard Resistance (for RHD)

      Tester Connection

      Condition

      Specified Condition

      F1-2 - A62-7 (D)

      Always

      Below 1 Ω

      F1-2 or A62-7 (D) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    A311430C03

    *a

    Front view of wire harness connector

    (to Clutch Start Switch Assembly (for LHD))

    *b

    Front view of wire harness connector

    (to Clutch Start Switch Assembly (for RHD))

    1. Disconnect the clutch start switch assembly connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage (for LHD)

      Tester Connection

      Switch Condition

      Specified Condition

      A87-1 - Body ground

      Ignition switch ON

      11 to 14 V

      Standard Voltage (for RHD)

      Tester Connection

      Switch Condition

      Specified Condition

      F1-1 - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - EFI MAIN NO. 1 RELAY)Click here

    OK

  5. REPLACE ECM

    1. Replace the ECM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  6. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - EFI MAIN NO. 1 RELAY)

    1. Disconnect the clutch start switch assembly connector.

    2. Remove the EFI MAIN NO. 1 relay from the engine room relay block and junction block.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (for LHD)

      Tester Connection

      Condition

      Specified Condition

      A87-1 - 3 (EFI MAIN NO. 1 relay holder)

      Always

      Below 1 Ω

      A87-1 or 3 (EFI MAIN NO. 1 relay holder) - Body ground

      Always

      10 kΩ or higher

      Standard Resistance (for RHD)

      Tester Connection

      Condition

      Specified Condition

      F1-1 - 3 (EFI MAIN NO. 1 relay holder)

      Always

      Below 1 Ω

      F1-1 or 3 (EFI MAIN NO. 1 relay holder) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  7. CHECK ECM POWER SOURCE CIRCUIT

    1. Check the ECM power source circuit.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  8. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  9. REPLACE CLUTCH START SWITCH ASSEMBLY

    1. Replace the clutch start switch assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  10. SECURELY REINSTALL CLUTCH START SWITCH ASSEMBLY

    1. Securely reinstall the clutch start switch assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

    Result

    Proceed to

    NEXT
    NEXT

    END