Dtc P0504 Brake Switch A / B Correlation

Двигатель. Toyota Rav4. Aca30, 33, 38 Ala30
Система Управления Двигателем 2Ad-Fhv. Toyota Rav4. Aca30, 33, 38 Ala30

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK STOP LIGHT SWITCH

CHECK STP SIGNAL

INSPECT STOP LIGHT SWITCH

CHECK WIRE HARNESS (STOP LIGHT SWITCH - ECM)

DTC P0504 Brake Switch "A" / "B" Correlation


DESCRIPTION

In this system, the signals of the duplex type stop light switch (STP and ST1-) are used to judge whether the brake system is abnormal. When signals that indicate depressing and releasing the brake pedal are detected simultaneously, the ECM interprets this as a malfunction of the stop light switch.

УКАЗАНИЕ:
Normal conditions are shown in the table below.

Signal
Brake Pedal Released
In Transition
Brake Pedal Depressed
STP
OFF
ON
ON
ST1-
ON
ON
OFF

DTC No.
DTC Detection Condition
Trouble Area
P0504
Conditions (a), (b) and (c) continue for 0.5 seconds or more:
(1 trip detection logic)
(a) Ignition switch is on (IG)
(b) Brake pedal is released
(c) STP signal is OFF when ST1- signal is OFF
  1. Short in stop light switch signal circuit
  2. Stop light switch
  3. ECM

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0504 Brake Switch A / B Correlation


INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:
After replacing the ECM, the new ECM needs registration (see page RAV4_ACA30 RM000000TJ4007X.html) and initialization (see page RAV4_ACA30 RM000000TIN007X.html).
1.CHECK STOP LIGHT SWITCH

  1. Check if the stop lights turn ON and OFF when the brake pedal is depressed and released.

    OK:
    Stop lights turn ON and OFF normally.


NG
REPAIR OR REPLACE STOP LIGHT SWITCH
OK


2.CHECK STP SIGNAL


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0504 Brake Switch A / B Correlation

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester ON.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Stop Light Switch.

  1. Check the result.

    OK:
    Brake Pedal
    		Specified Condition
    Depressed
    		STP signal ON
    Released
    		STP signal OFF


OK
CHECK FOR INTERMITTENT PROBLEMS
NG


3.INSPECT STOP LIGHT SWITCH


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0504 Brake Switch A / B Correlation

  1. Disconnect the A5 stop light switch connector.

  1. Measure the resistance of the stop light switch.

    Standard resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    1 - 2
    		Pin not pushed
    		Below 1 Ω
    3 - 4
    		Pin not pushed
    		10 kΩ or higher
    1 - 2
    		Pin pushed
    		10 kΩ or higher
    3 - 4
    		Pin pushed
    		Below 1 Ω

  1. Reconnect the stop light switch connector.



NG
REPLACE STOP LIGHT SWITCH
OK


4.CHECK WIRE HARNESS (STOP LIGHT SWITCH - ECM)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0504 Brake Switch A / B Correlation

  1. Disconnect the A5 stop light switch connector.

  1. Disconnect the A12 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    A5-1 - A12-35 (STP)
    		Below 1 Ω
    A5-4 - A12-34 (ST1-)
    		Below 1 Ω
    A5-1 or A12-35 (STP) - Body ground
    		10 kΩ or higher
    A5-4 or A12-34 (ST1-) - Body ground
    		10 kΩ or higher

  1. Reconnect the stop light switch connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM