LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2004 >> Tundra Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 471 (Brakes - Abs With EBD & BA & TRAC & VSC (Diagnostics)) >> Abs With EBD & BA & TRAC & VSC System >> Circuit Inspection >> DTC C1249/49: Open Circuit in Stop Light Switch Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Tundra and 2005 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: When replacing the master cylinder solenoid, perform zero point CALIBRATION  .
  1. Check stop light switch operation.

    CHECK: 

    Check that the stop light comes on when the brake pedal is depressed and goes off when the brake pedal is released.

    OK: 

    Stop light function is normal.

    HINT:

    Check the stop light bulb as it may have burnt out.

    1. NG: Go to step   4 . 
    2. OK: Go to next step. 
  2. Measure voltage of the master cylinder solenoid (skid control ECU STP terminal). 

    PREPARATION: 

    Disconnect the skid control ECU connector S29.

    CHECK: 

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

    Fig 1: Identifying Terminal STP Of Skid Control ECU Connector S29
    G02642996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    SKID CONTROL ECU CONNECTOR S29 VOLTAGE SPECIFICATIONS

    Tester Connection Switch Condition Specified Condition
    S29-7 (STP) - Body ground Brake pedal depressed 8 to 14V
    S29-7 (STP) - Body ground Brake pedal released Below 1.5V
    1. NG: Repair or replace STP circuit. 
    2. OK: Go to next step. 
  3. Reconfirm DTC (See  DTC CHECK / CLEAR   ). 

    PREPARATION: 

    Clear the DTCs.

    CHECK: 

    Check if the same DTCs are detected.

    RESULT: 

    DTC OUTPUT RESULT

    DTC is output A
    DTC is not output B
    1. B: END. 
    2. A: Replace master cylinder solenoid (See  DISASSEMBLY  ). 
  4. Inspect stop light switch (Stop light power source terminal voltage). 

    PREPARATION: 

    Disconnect the stop light switch connector S4.

    CHECK: 

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

    OK: 

    Access Cab., Standard Cab.: 

    STOP LIGHT SWITCH CONNECTOR S4 VOLTAGE SPECIFICATIONS (1 OF 2)

    Tester Connection Condition Specified Value
    S4-2 - Body ground Ignition SW ON 10 to 14V
    Fig 2: Identifying Stop Light Switch Connector S4 (Access, Standard Cab)
    G02642997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    Double Cab.: 

    STOP LIGHT SWITCH CONNECTOR S4 VOLTAGE SPECIFICATIONS (2 OF 2)

    Tester Connection Switch Condition Specified Value
    S4-4 - Body ground Ignition SW ON 10 to 14V
    Fig 3: Identifying Stop Light Switch Connector S4 (Double Cab)
    G02642998Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Repair or replace harness or connector (Stop light power source circuit). 
    2. OK: Go to next step. 
  5. Inspect stop light switch. 

    PREPARATION: 

    Disconnect the stop light switch connector S4.

    CHECK: 

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

    OK: 

    Access Cab., Standard Cab.: 

    STOP LIGHT SWITCH CONTINUITY CONDITIONS (1 OF 2)

    Tester Connection Switch Condition Specified Condition
    1 - 2 Free No continuity
    1 - 2 Pushed in Continuity
    Fig 4: Inspecting Stop Light Switch (Access, Standard Cab)
    G02642999Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    Double Cab.: 

    STOP LIGHT SWITCH CONTINUITY CONDITIONS (2 OF 2)

    Tester Connection Switch Condition Specified Condition
    1 - 4 Free No continuity
    1 - 4 Pushed in Continuity
    Fig 5: Inspecting Stop Light Switch (Double Cab)
    G02643000Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Replace stop light switch. 
    2. OK: Go to next step. 
  6. Check harness and connector between master cylinder solenoid (skid control ECU) and stop light switch. 
    1. NG: Repair or replace harness or connector (STP circuit). 
    2. OK: Go to next step. 
  7. Reconfirm DTC (See  DTC CHECK / CLEAR   ). 

    PREPARATION: 

    Clear the DTCs.

    CHECK: 

    Check if the same DTCs are detected.

    RESULT: 

    DTC OUTPUT RESULT

    DTC is output A
    DTC is not output B
    1. B: END. 
    2. A: Replace master cylinder solenoid (See  DISASSEMBLY  ). 
scientia non olet · About LEMON Manuals