BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Vacuum Brake Booster): TEST MODE PROCEDURE; 2019 - 2024 MY RAV4 RAV4 HV [11/2018

NOTICE:

After replacing or removing and installing a speed sensor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.
After replacing or removing and installing a speed sensor rotor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.

HINT:

Signals related to the electronically controlled brake system can be inspected by performing a Dealer Mode (Signal Check) inspection. During the inspection, the display of items determined normal by the skid control ECU (brake actuator assembly) changes from incomplete to complete.
During Dealer Mode (Signal Check), the VSC system does not operate regardless of whether the system is normal or a malfunction is detected.
If a sensor is malfunctioning, ABS does not operate and the ABS warning and slip indicator lights illuminate.
w/ Pre-collision System:
When entering Dealer Mode (Signal Check), the skid control ECU (brake actuator assembly) communicates with the forward recognition camera to judge whether the vehicle is equipped with the pre-collision system. Therefore, do not exit Dealer Mode (Signal Check) within 5 seconds of entering Dealer Mode (Signal Check).
Even during Dealer Mode (Signal Check), if there is a system malfunction that causes brake hold control to be prohibited, when the vehicle is under the following conditions and the brake hold switch (integration control and panel assembly) is turned on, the brake hold operated indicator light blinks.
- Vehicle Conditions:
  1. The driver door is closed.
  2. The driver seat belt is fastened.

(8) Switch the skid control ECU (brake actuator assembly) to Dealer Mode (Signal Check) using the Techstream. Enter the following menus: Chassis / Brake/EPB / Utility / Signal Check.

Chassis > Brake/EPB > Utility

Do not exit Dealer Mode (Signal Check) within 5 seconds of entering Dealer Mode (Signal Check). If Dealer Mode (Signal Check) is exited within 5 seconds of entering Dealer Mode (Signal Check), DTC U023A87 may be stored. If DTC U023A87 is output after exiting Dealer Mode (Signal Check), enter Dealer Mode (Signal Check) again, wait at least 5 seconds, then recheck for DTCs.

(1) Confirm that the ABS warning light and slip indicator light indicate the Dealer Mode pattern (blinking at 0.25-second intervals).

HINT:

If the ABS warning light or slip indicator light remains illuminated or does not illuminate when Dealer Mode (Signal Check) is entered, a component or wire harness may be malfunctioning.
When entering Dealer Mode (Signal Check), if the parking brake is engaged, the parking brake indicator light (red) will illuminate, and if the parking brake is not engaged, the parking brake indicator light (red) will blink in the Dealer Mode pattern (blinking at 0.25-second intervals).

(1) Depress the brake pedal several times with the engine stopped to release the vacuum from the brake booster assembly.

(2) Turn the ignition switch on (IG) (engine stopped) and depress the brake pedal at a pedal force of approximately 74 N (7.5 kgf, 16.6 lfg) or above for 1 second or more and check that the warning light illuminates. (Malfunction check)

(3) After the booster malfunction check is complete, maintain a pedal force of approximately 74 N (7.5 kgf, 16.6 lbf) or above on the brake pedal and turn on the engine. Immediately release the brake pedal and check that the warning light turns off. (Normal status check)

Before checking again after starting the engine, exit and then activate the test mode and depress the brake pedal several times with the engine stopped to release the booster vacuum.

Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds.

NOTICE:

If the sensor check does not complete successfully or a malfunctioning sensor is detected, the ABS warning light indicates the Dealer Mode pattern (blinking at 0.25-second intervals) and the ABS system will not operate.
If the vehicle is driven at 80 km/h (50 mph) or more after the ABS warning light turns off, the speed sensor check will be performed again. In this situation, the ABS warning light will start blinking again.
The speed sensor check may not complete if the sensor check is started with the steering wheel turned or one or more wheels spinning.

If the sensor check completes successfully, the ABS warning light turns off when the vehicle is being driven, and indicates the Dealer Mode pattern (blinking at 0.25-second intervals) when the vehicle is stopped.

(1) If the sensor check completes successfully, the ABS warning light turns off when the vehicle is being driven, and indicates the Dealer Mode pattern (blinking at 0.25-second intervals) when the vehicle is stopped.

NOTICE:

When all Dealer Mode (Signal Check) Inspection Items are complete, the sensor check is complete.
If the sensor checks have not completed, the ABS warning light will remain blinking while the vehicle is being driven, and the ABS will not operate.
If any malfunctions are detected during Dealer Mode (Signal Check), the ABS warning light or slip indicator light remains illuminated.
If any DTCs are output or if Dealer Mode (Signal Check) items do not complete even after repeated attempts, repair or replace the malfunctioning part.