Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001HG80
Model Year Start: 2019 Model: RAV4 Prod Date Range: [02/2019 - 12/2021]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): CHECK FOR INTERMITTENT PROBLEMS; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]

CHECK FOR INTERMITTENT PROBLEMS

CHECK FOR INTERMITTENT PROBLEMS

HINT:

A momentary interruption (open circuit) in the connectors and/or wire harnesses between the sensors and ECUs can be detected using the Data List function of the Techstream.

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Follow the directions on the Techstream to display the Data List and select areas where momentary interruptions should be monitored.

HINT:

  • A momentary interruption (open circuit) cannot be detected for 3 seconds after the ignition switch is turned to ON (initial check).
  • If Error remains displayed for one of the items on the Techstream, check for continuity between the ECU and the item for which Error is displayed.
  • If a momentary interruption occurs and Error is displayed on the Techstream, Error will remain displayed on the Techstream for 1 second after the circuit returns to normal.

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

FR Speed Open

Front speed sensor RH open detection

Error or Normal

Error: Momentary interruption detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: C1464

FL Speed Open

Front speed sensor LH open detection

Error or Normal

Error: Momentary interruption detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: C1465

RR Speed Open

Rear speed sensor RH open detection

Error or Normal

Normal: Momentary interruption not detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: C1466

RL Speed Open

Rear speed sensor LH open detection

Error or Normal

Error: Momentary interruption detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: C1467

Yaw Rate Open

Yaw rate sensor open detection

Error or Normal

Error: Momentary interruption detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: U0123

Deceleration Open

Acceleration sensor open detection

Error or Normal

Error: Momentary interruption detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: U0124

Steering Open

Steering sensor open detection

Error or Normal

Error: Momentary interruption detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: U0126

Master Cylinder Open

Regulator pressure sensor open detection

Error or Normal

Error: Momentary interruption detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: C1246

Stroke Open

Brake pedal stroke sensor assembly open detection

Error or Normal

Error: Momentary interruption detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: C1247

FR Wheel Cylinder Open

Wheel cylinder pressure sensor open detection

Error or Normal

Error: Momentary interruption detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: C1364

Accumulator Open

Accumulator pressure sensor open detection

Error or Normal

Error: Momentary interruption detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: C1365

HV Communication Open

Hybrid vehicle communication open detection

Error or Normal

Error: Hybrid vehicle control ECU assembly communication invalid state detected

Normal: Hybrid vehicle control ECU assembly communication invalid state not detected
  • After hybrid vehicle control ECU assembly communication invalid state occurs, if there no further invalid state occurs, it switches from "Error" to "Normal".
  • Related DTC: U0293

Air Bag ECU Communication Open

Airbag ECU assembly communication open detection

Error or Normal

Error: Momentary interruption detected

Normal: Momentary interruption not detected
  • After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
  • Related DTC: U0151

(f) While observing the screen, gently jiggle the connectors or wire harnesses between the ECUs and sensors, or between ECUs.

OK:

Normal is displayed.

HINT:

If the display changes, this indicates that there has been a momentary interruption (open circuit) in the connector and/or wire harness. In this case, repair or replace the connectors and/or wire harnesses as one of them is faulty.