Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001EABQ
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 02/2019]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C1249; Open Circuit in Stop Light Switch Circuit; 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]

DTC

C1249

Open Circuit in Stop Light Switch Circuit

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) receives the stop light switch assembly signal and detects the brake pedal operation status.

The skid control ECU (brake booster with master cylinder assembly) has an open detection circuit, which stores this DTC if it detects an open in the stop light input line or ground line of the stop light circuit with the stop light switch assembly off (brake pedal not depressed).

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1249

Open Circuit in Stop Light Switch Circuit

231

When IG1 terminal voltage is 9.5 V higher than, an open circuit occurs between STP terminal circuits A and B for 10 seconds or more.

  • Harness or connector
  • Skid control ECU (Brake booster with master cylinder assembly)

-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY

PROCEDURE

1.

READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH ASSEMBLY)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Select the Data List on the Techstream.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DATA LIST / ACTIVE TEST

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Stop Light SW

Stop light switch assembly

ON or OFF

ON: Brake pedal depressed

OFF: Brake pedal released

-

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Stop Light SW

(d) Check that the stop light switch assembly display observed on the Techstream changes according to brake pedal operation.

OK:

The Techstream displays ON or OFF according to brake pedal operation.

NG

GO TO STEP 3

OK

2.

RECONFIRM DTC

(a) Clear the DTCs.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DTC CHECK / CLEAR

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(c) Turn the power switch on (READY).

(d) Depress the brake pedal several times to test the stop light circuit.

(e) Check if the same DTC is output.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DTC CHECK / CLEAR

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTC C1249 is not output.

A

DTC C1249 is output.

B

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

Click here 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): PROBLEM SYMPTOMS TABLE

A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

3.

CHECK HARNESS AND CONNECTOR (STP TERMINAL)

(a) Turn the power switch off.

*a

Front view of wire harness connector

(to Skid Control ECU (Brake Booster with Master Cylinder Assembly))

(b) Make sure that there is no looseness at the locking part and the connecting part of the connector.

(c) Disconnect the A42 skid control ECU (brake booster with master cylinder assembly) connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A42-33 (STP) - Body ground

Stop light switch assembly on (Brake pedal depressed)

11 to 14 V

A42-33 (STP) - Body ground

Stop light switch assembly off (Brake pedal released)

Below 1.5 V

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

Click here 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): PROBLEM SYMPTOMS TABLE

OK

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (STP CIRCUIT)