ECD SYSTEM(for Swirl Control Valve), 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.

DTC Detection Condition

Trouble Area

P0704

No clutch switch signals to ECM despite gears being shifted.

(3 trip detection logic)

  • Open or short in No. 2 clutch start switch assembly circuit

  • No. 2 clutch start switch assembly

  • ECM

WIRING DIAGRAM

A311429E05

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 NO. 2 CLUTCH START SWITCH ASSEMBLY

    1. Check the No. 2 clutch start switch assembly installation (Click here).

      OK

      No. 2 clutch start switch assembly is installed correctly.

    SECURELY REINSTALL NO. 2 CLUTCH START SWITCH ASSEMBLYClick here

  2. INSPECT NO. 2 CLUTCH START SWITCH ASSEMBLY

    1. Inspect the No. 2 clutch start switch assembly (Click here).

    REPLACE NO. 2 CLUTCH START SWITCH ASSEMBLYClick here

  3. CHECK HARNESS AND CONNECTOR (ECM - NO. 2 CLUTCH START SWITCH ASSEMBLY)

    1. Disconnect the No. 2 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

      Tester Connection

      Condition

      Specified Condition

      A3-2 - A76-7 (D)

      Always

      Below 1 Ω

      A3-2 or A76-7 (D) - Body ground

      Always

      10 kΩ or higher

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    U122125E02

    1. Disconnect the No. 2 clutch start switch assembly connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      A3-1 - Body ground

      Ignition switch ON

      11 to 14 V
      Table 1. Text in Illustration

      *a

      Front view of wire harness connector

      (to No. 2 clutch start switch assembly)

    CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY - NO. 2 CLUTCH START SWITCH ASSEMBLY)Click here

  5. REPLACE ECM

    1. Replace the ECM (Click here).

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  6. SECURELY REINSTALL NO. 2 CLUTCH START SWITCH ASSEMBLY

    1. Securely reinstall the No. 2 clutch start switch assembly (Click here).

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  7. REPLACE NO. 2 CLUTCH START SWITCH ASSEMBLY

    1. Replace the No. 2 clutch start switch assembly (Click here).

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  8. CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY - NO. 2 CLUTCH START SWITCH ASSEMBLY)

    1. Disconnect the No. 2 clutch start switch assembly connector.

    2. Remove the EFI MAIN relay from the engine room No. 1 relay block.

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

      Standard Resistance (for LHD)

      Tester Connection

      Condition

      Specified Condition

      A3-1 - 3 (EFI MAIN relay holder)

      Always

      Below 1 Ω

      A3-1 or 3 (EFI MAIN relay holder) - Body ground

      Always

      10 kΩ or higher

      Standard Resistance (for RHD)

      Tester Connection

      Condition

      Specified Condition

      A3-1 - 5 (EFI MAIN relay holder)

      Always

      Below 1 Ω

      A3-1 or 5 (EFI MAIN relay holder) - Body ground

      Always

      10 kΩ or higher

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

  9. CHECK ECM POWER SOURCE CIRCUIT

    1. Check the ECM power source circuit (Click here).

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  10. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

  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 (Click here).

    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.

    8. Confirm that the DTC is not output again.

    END