Traction Control (TRC) [Toyota Camry Vista-V40]

Check on the car

Checking the TRC Operation Indicator

Turn the ignition on (ON). Check that the TRC operation indicator light is on for about 3 seconds.



Checking the "TRC OFF" indicator

1. Turn on the ignition (ON). Check that the "TRC" indicator light has been on for about 3 seconds.



2. After the "TRC OFF" indicator goes out, press the "TRC OFF" button. The indicator should light up.

Press the button again and make sure the "TRC OFF" indicator goes out.

Checking the auxiliary throttle servo

Set the automatic transmission selector to position "P" or "N", turn on the ignition and make sure (by sound) that the auxiliary throttle actuator has started working.

Note: Do not press the accelerator pedal.

Troubleshooting

Diagnostic system

1. Security mode "fail safe".

a) In the event of failure of any element of the TRC system, as well as elements of the electronic engine control unit or control unit, an emergency operating mode is provided (to get to the nearest service station). At the same time, the TRC system operation signal and the "TRC OFF" signal are displayed on the instrument panel.

b) When the "TRC OFF" indicator (or the "TRC OFF" indicator and the TRC operation indicator) are lit, the auxiliary throttle servo is disengaged and the auxiliary throttle is moved to the fully open position by the return spring.

2. Checking with diagnostic codes.

a) Disconnect the wiring harness and short-circuit the "TC" and "E1" terminals of the diagnostic connector.

Note: Turn on the ignition. Do not mix up the terminals - this may cause a breakdown.

b) Turn on the ignition and read the fault codes based on the number of flashes of the "TRC OFF" indicator.



If there is no malfunction, the light panel flashes every 0.5 seconds (flash duration is 0.25 sec).



If there is a fault, the first sequence of flashes (duration 0.5 sec) corresponds to the first number of the diagnostic code, which consists of two numbers. After a pause of 1.5 seconds, a second sequence of flashes is output, corresponding to the second number of the code. If there are two or more fault codes, an interval of 2.5 seconds is set between them when output.

After all codes have been output, there is a 4.0 s pause, and then they are all repeated while the "TC" and "E1" terminals of the diagnostic connector are closed.

3. Clearing diagnostic codes.

a) Disconnect the wiring harness and short-circuit the "TC" and "E1" terminals of the diagnostic connector.

Note: Do not mix up the terminals - this may cause damage.

b) Turn on the ignition.

c) Turn the TRC switch on and off more than 8 times within 3 seconds.



d) Make sure that the indicator shows a no-fault code.

Note: if the same codes are issued as before erasing, repeat step (c).

d) Remove the jumper.

e) Turn the ignition on again and make sure that the "TPC OFF" lamp goes out after 3 seconds of burning.

Additional throttle valve servo



Check for continuity between the throttle actuator terminals.



Checking the "TRC OFF" switch

Turn on the switch and check the continuity between the "CSW" and "E" terminals.

Switch:

• not pressed - no conductivity
• pressed - there is conductivity

Checking the auxiliary throttle position sensor

For checking the additional throttle position sensor, see section "Throttle body".

Checking the electronic control unit of the TRC system

1. Turn off the ignition(OFF), disconnect the electronic control unit connector, and measure the resistance between the following terminals:



2. Measure the voltage between the terminals of the TRC system electronic control unit.