Code No.P0504: Brake Switch Correction
Code No.P0573: Brake Switch High










OPERATION



DIAGNOSIS CODE SET CONDITIONS



POSSIBLE CAUSES



DIAGNOSIS

STEP 1. M.U.T.-III CAN bus diagnosis.

  • Using M.U.T.-III, perform CAN bus line diagnosis.

Q. Is the check result satisfactory?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Diagnosis, Can Bus Diagnostic Table ). Then go to Step 7.

STEP 2. M.U.T.-III data list
Item 1D: Brake switch (Refer to data list reference table ).

Q. Is the check result normal?
Go to Step 7.
Go to Step 3.

STEP 3. Check the stop lamp switch.
(1)Remove the stop lamp switch (Refer to GROUP 35A, Brake Pedal ).


(2)Connect an ohmmeter to the stop lamp switch between terminals 3 and 4.
(3)Check for continuity between the terminals when the plunger of the stop lamp switch is pushed in and when it is released.
OK: The stop lamp switch is operating properly if the circuit is open between terminals 3 and 4 when the plunger is released, and if resistance value is less than 2 ohms between terminals 3 and 4 when the plunger is pushed in to a depth of within 4.5 mm from the outer case edge surface.

Q. Is the check result normal?

Install the stop lamp switch (Refer to GROUP 35A, Brake Pedal ). Then go to Step 4.

Replace the stop lamp switch (Refer to GROUP 35A, Brake Pedal ). Then go to Step 8.

STEP 4. Connectors check: B-06 engine-ECU connector, C-126 stop lamp switch connector

Q. Is the check result normal?
Go to Step 5.
Repair or replace the damaged components. Then go to Step 8.

STEP 5. Check the harness between engine-ECU connector B-06 terminal No.81 and stop lamp switch connector C-126 terminal No.3.

Q. Is the check result normal?
Go to Step 6.
Repair the damaged harness wire. Then go to Step 8.

STEP 6. M.U.T.-III data list
Item 1D: Brake switch (Refer to data list reference table ).

Q. Is the check result normal?
Go to Step 7.
Replace the engine-ECU (Refer to GROUP 13A, Engine-ECU ). Then go to Step 8.

STEP 7. Check the M.U.T.-III diagnosis code.

Q. Is M.U.T.-III diagnosis code No. P0504 or P0573 set?
Replace the engine-ECU (Refer to GROUP 13A, Engine-ECU ). Then go to Step 8.
It can be assumed that this malfunction is intermittent.

STEP 8. Check the M.U.T.-III diagnosis code.

Q. Is M.U.T.-III diagnosis code No. P0504 or P0573 set?
Return to Step 1.
The procedure is complete.