Toyota Sienna Service Manual: Stop Light Switch Circuit Malfunction
DTC P0571 Stop Light Switch Circuit Malfunction
DESCRIPTION
The ECM receives the brake demand signal from the distance control ECU and transmits it to the skid control ECU (brake actuator assembly).
The skid control ECU (brake actuator assembly) receives a signal from the ECM and operates the brake actuator.
The skid control ECU (brake actuator assembly) operates the brake actuator and illuminates the stop light by operating the BRK relay at the same time.
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DTC No. |
DTC Detection Condition |
Trouble Area |
|
P0571 |
This trouble code is output when the ECM detected the BRK relay error signal from the skid control ECU for 0.2 sec. or more while the dynamic cruise control is in operation. |
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WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK BRK RELAY
- Remove the BRK relay from the Relay Block No. 6.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
- Apply battery voltage between terminals 1 and 2.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
2 CHECK HARNESS AND CONNECTOR (BRK RELAY - BATTERY)
- Disconnect the connector from the Relay Block No. 6.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
3 CHECK HARNESS AND CONNECTOR (BRK RELAY - SKID CONTROL ECU)
- Disconnect the S3 connector from the skid control ECU.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
REPLACE BRAKE ACTUATOR ASSEMBLY
Brake Switch "A" Circuit
DTC P0571 Brake Switch "A" Circuit
DESCRIPTION
When the brake pedal is depressed, the stop light switch sends a signal to
the ECM. When the ECM
receives this signal, it cancels the crui ...
Control Module Performance
DTC P0607 Control Module Performance
DESCRIPTION
This DTC indicates a malfunction in the ECM.
HINT:
The ECM receives signals from each sensor to control all the functions of the
cruise control w ...
Other materials:
Cellular Phone cannot Send / Receive
INSPECTION PROCEDURE
1 CHECK BLUETOOTH SETTINGS
Check if the Bluetooth settings are correct.
OK:
Bluetooth settings are correct.
2 CHECK CELLULAR PHONE
Check if the cellular phone is Bluetooth compatible.
HINT:
Some versions of Bluetooth compatible cellular phones
may not function ...
Short in Curtain Shield Squib RH Circuit
DTC B1160/83 Short in Curtain Shield Squib RH Circuit
DESCRIPTION
The curtain shield squib RH circuit consists of the center airbag sensor
assembly and the curtain shield
airbag assembly RH.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B1160/83 is record ...
Installation
1. INSTALL BRAKE PEDAL SUPPORT ASSEMBLY
(a) Install the brake pedal support sub-assembly with
the 4 nuts.
Torque: 16 N*m (160 kgf*cm, 12 ft.*lbf)
(b) Install the clip and clevis pin to the brake pedal
lever.
(c) Using needle-nose pliers, install the tension spring.
(d) Install the ...
