Toyota Camry owners & service manuals

Toyota Camry (XV70): Diagnosis System

DIAGNOSIS SYSTEM

DESCRIPTION

When troubleshooting a vehicle with a diagnosis system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from the skid control ECU (brake actuator assembly).

The skid control ECU (brake actuator assembly) records DTCs when it detects a malfunction in itself or in its circuits.

To check for DTCs, connect the Techstream to the DLC3 on the vehicle. The Techstream can be used to clear the DTCs, activate various actuators, and check the Freeze Frame Data and Data List.

(a) Check the battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge the battery before proceeding to the next step.

(b) Check the DLC3.

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DIAGNOSIS

(a) If a malfunction occurs in one part of the system, the skid control ECU (brake actuator assembly) illuminates the warning light corresponding to the malfunctioning system (ABS warning light, brake system warning light (red indicator) or slip indicator light).

(b) If a DTC is stored by the skid control ECU (brake actuator assembly) and the following conditions are met when the brake hold switch (electric parking brake switch assembly) is pressed, the brake hold operated indicator light blinks.

  • Vehicle Conditions:
    1. The driver door is closed.
    2. The driver seat belt is fastened.

(c) DTCs are simultaneously stored in memory.

The DTCs can be read by connecting the Techstream.

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(d) This system has a Test Mode (Signal Check) function.

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WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

(a) When the ignition switch is turned on (IG), check that the ABS warning light, brake system warning light (red indicator), VSC OFF indicator light, brake hold standby indicator light, brake hold operated indicator light and slip indicator light come on for approximately 3 seconds.

HINT:

  • When the brake fluid level is low or the vacuum inside the brake booster decreases, the brake system warning light (red indicator) comes on.
  • If the warning light and indicator light check result is not normal, proceed to troubleshooting for the ABS warning light, brake system warning light (red indicator), VSC OFF indicator light, slip indicator light, brake hold standby indicator light and brake hold operated indicator light circuits.
  • If any of the indicators remains on or does not come on, proceed to troubleshooting for the light circuits listed below.

Trouble Area

See Procedure

ABS warning light circuit (Remains on)

ABS warning light circuit (Does not come on)

Brake system warning light (red indicator) circuit (Remains on)

Brake system warning light (red indicator) circuit (Does not come on)

VSC OFF indicator light circuit (Remains on)

VSC OFF indicator light circuit (Does not come on)

Slip indicator light circuit (Remains on)

Slip indicator light circuit (Does not come on)

Brake hold standby indicator light circuit

Brake hold operated indicator light circuit

    READ NEXT:

     Dtc Check / Clear

    DTC CHECK / CLEAR DTC CHECK (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) Read the DTCs following th

     Freeze Frame Data

    FREEZE FRAME DATA FREEZE FRAME DATA/INFORMATION (a) Using the Techstream, check the vehicle condition (ECU, sensor) when the brake system operates or a DTC is output. CHECK FREEZE FRAME DATA AND I

     Fail-safe Chart

    FAIL-SAFE CHART FAIL-SAFE CHART (a) When the skid control ECU (brake actuator assembly) detects a solenoid valve malfunction or abnormal signal from a sensor, the brake actuator assembly cuts power an

    SEE MORE:

     If you have a flat tire

    Your vehicle is equipped with a spare tire. The flat tire can be replaced with the spare tire. WARNING ■If you have a flat tire Do not continue driving with a flat tire. Driving even a short distance with a flat tire can damage the tire and the wheel beyond repair, which could result in an

     Poor Sound Quality in All Modes (Low Volume)

    PROCEDURE 1. CHECK AUDIO SETTINGS (a) Set treble, middle and bass to the initial values and check that the sound is normal. OK: The sound returns to normal. HINT: Sound quality adjustment measures vary according to the type of amplifier. OK END NG

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