P0571

P0571 BRAKE SWITCH A

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, power switch OFF and wait for at least
10 seconds, then perform the next test.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT
1.Set the vehicle to READY.
2.Accelerate the vehicle up to 50 km/h (31 MPH) and then depress the brake pedal to decelerate and stop the vehicle.
3.Repeat step 2 five more times.
4.Check DTC.
Is "P0571" detected?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK STOP LAMP SWITCH SIGNAL

With CONSULT
1.Set the vehicle to READY.
2.Select "Data Monitor" in "SHIFT".
3.Select "BRAKE SWITCH" and "BRAKE SWITCH (CAN)".
4.Identify an abnormal signal value.





Which signal value is abnormal?
BRAKE SWITCH-GO TO 2.
BRAKE SWITCH (CAN)-GO TO 5.

2. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1.Power switch OFF.
2.Disconnect the stop lamp switch connector.
3.Check the voltage between stop lamp switch vehicle side harness connector terminal and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 3.

3. DETECTION OF MALFUNCTION ITEMS

Check the following items:
- Harness open circuit or short circuit between the stop lamp switch vehicle side harness connector and 12V
battery.
- 12V battery
- 10A fuse (# 12)
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace the malfunctioning parts.

4. CHECK STOP LAMP SWITCH SIGNAL INPUT CIRCUIT

1.Disconnect the electric shift control module connector.
2.Check the continuity between electric shift control module vehicle side harness connector terminal and stop lamp switch vehicle side harness connector terminal.





3.Check the continuity between electric shift control module vehicle side harness connector terminal and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace the malfunctioning parts.

5. CHECK STOP LAMP SWITCH

Check the stop lamp switch. Refer to "Component Inspection" C1116.
Is the inspection result normal?
YES- Replace the electric shift control module. Refer to "Removal and Installation" Removal And Installation.
NO- Replace the stop lamp switch. Refer to "Component Parts Location" Locations.