Precheck

Total OBD & ECU Auto Diagnostics

TOAD Auto Diagnostics

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PRECAUTION

To distinguish trouble and repair it, perform necessary electrical shock prevention operation (See page IN-4).

Some portions of the wiring harness belong to the 288 V circuit, to which a high voltage is supplied. To avoid receiving an electrical shock, be sure to observe the following:

Wear insulating gloves during inspection. Before removing or installing parts and connectors, remove the service plug and conform that the voltage at the output terminals has dropped down to 0 V.

When disengaging wiring connectors, hold the connector bodies to avoid pulling the wires. When engaging wiring connectors, be sure to engage them securely.

USA:

USA:

CANADA:
N F12426

DLC3

DLC3

CG

F09750

2. DIAGNOSIS SYSTEM

(a) Release the parking brake pedal.

(b) Check the indicator.

When the ignition switch is turned ON, check that the ABS warning light and BRAKE warning light goes on for approx. 3 seconds.

HINT:

• When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light is lit.

• If the indicator check result is not normal, proceed to troubleshooting for the ABS warning light circuit or BRAKE warning light circuit (See page DI-447 or DI-451).

(c) Check the warning buzzer.

When depressing the brake pedal repeatedly it may turn on the brake warning buzzer.

HINT:

If the warning buzzer check result is not normal, proceed to troubleshooting for the brake warning buzzer circuit (See page DI-454).

(d) In case of not using TOYOTA hand-held tester: Check the DTC.

(1) Using SST, connect terminals Tc and CG of DLC3. SST 09843-18040

(2) Turn the ignition switch ON.

(3) Read the DTC from the ABS warning light on the combination meter.

HINT:

• If no code appears, inspect the diagnostic circuit or ABS warning light circuit (See page DI-447 or DI-457).

Normal Code

Code 11 and 21

Code 11 Code 21

• As an example, the blinking patterns for normal code and codes 11 and 21 are shown on the left.

(4) Codes are explained in the code table on page DI-368.

(5) After completing the check, disconnect terminals Tc and CG, and turn off the display.

If 2 or more malfunctions are indicated at the same time the lowest numbered DTC will be displayed 1st.

TOYOTA Hand-held Tester

TOYOTA Hand-held Tester

R01346

Toyota Handheld Tester

(e) In case of using TOYOTA hand-held tester: Check the DTC.

(1) Hook up the TOYOTA hand-held tester to the DLC3.

(2) Turn the ignition switch ON.

(3) Read the DTC by following the prompts on the tester screen.

HINT:

Please refer to the TOYOTA hand-held tester operator's manual for further details.

(f) In case of not using TOYOTA hand-held tester: Clear the DTC.

(1) Using SST, connect terminals Tc and CG of DLC3. SST 09843-18040

(2) Turn the ignition switch ON.

(3) Clear the DTC stored in ECU by depressing the brake pedal 8 or more times within 5 seconds.

(4) Check that the warning light shows the normal code.

(5) Remove the SST from the terminals of DLC3. SST 09843-18040

R01346

CG
F09750

0.13 sec.

0.13 sec.

ON -

OFF -

BR3904

Toyota Hand Held Tester

(g) In case of using TOYOTA hand-held tester: Clear the DTC.

(1) Hook up the TOYOTA hand-held tester to the DLC3.

(2) Turn the ignition switch ON.

(3) Operate the TOYOTA hand-held tester to erase the codes.

HINT:

Please refer to the TOYOTA hand-held tester operator's manual for further details.

3. SENSOR SIGNAL CHECK (TEST MODE)

HINT:

If the ignition switch is turned from ON to ACC or LOCK during test mode, DTC will be erased. (a) In case of not using TOYOTA hand-held tester: Check the sensor signal.

(1) Turn the ignition switch OFF.

(2) Using SST, connect terminals Ts and CG of DLC3. SST 09843-18040

(3) Start the engine.

(4) Check that the ABS warning light blinks.

HINT:

If the ABS warning light does not blink, inspect the ABS warning light circuit and Ts terminal circuit (See page DI-447, DI-459).

HINT:

There is a case that the sensor check is not completed if the vehicle has its front wheels spun or its steering wheel steered during this check.

Keep the vehicle in the stationary condition and the brake pedal in free condition for 1 sec. or more. Keeping the vehicle in the stationary condition, depress the brake pedal with 98 N (10 kgf, 22 lbf) or more for 1 sec. or more. Drive vehicle straight forward. When driving the vehicle at the speed faster than 45 km/h (28 mph) for several seconds, check that the ABS warning light comes off.

(8) Stop the vehicle.

(9) Using SST, connect terminals Tc and CG of DLC3. SST 09843-18040

(10) Read the number of blinks of the ABS warning light.

HINT:

• See the list of DTC shown on the next page.

• If every sensor is normal, a normal code is output (A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated).

• If 2 or more malfunctions are indicated at the same time, the lowest numbered code will be displayed 1st.

ON OFF m-J

Malfunction Code (Example Code 72, 76) 2 7

Repeat

BR3893

(11) After doing the check, turn ignition switch OFF, and disconnect the SST from terminals Ts and CG, Tc and CG of DLC3. SST 09843-18040

Toyota Hand Held Tester

(b) In case of using TOYOTA hand-held tester: Check the DTC.

(1) Hook up the TOYOTA hand-held tester to the DLC3.

(2) Do step (3) to (8) on the previous page and this page.

(3) Read the DTC by following the prompts on the tester screen.

HINT:

Please refer to the TOYOTA hand-held tester operator's manual for further details.

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Responses

  • simon
    How do i locate "brake warning buzzer" on 2002 prius?
    9 years ago

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