Toyota Tacoma manuals

Toyota Corolla Repair Manual: Circuit description

The vehicle equipped with abs detects a vehicle speed using the stability control ecu and wheel speed sensor. This sensor monitors a wheel rotation speed and sends the signal to the ecu.

The stability control ecu converts these wheel speed signals into a 4pulse signal and outputs it to the ecm via the combination meter.

The ecm determines the vehicle speed based on the frequency of these pulse signals.

In the vehicle without abs, the no. 1 Vehicle speed sensor outputs a 4pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the ecm. The ecm determines the vehicle speed based on the frequency of these pulse signal.

W/ abs:

W/o abs:

W/o abs:

Monitor description

Monitor description

Equipped with abs:

the ecm assumes that the vehicle is driven when the rpm of the transmission counter gear indicates more than 300 rpm and it has been over 30 seconds since the park/neutral position switch was turned off. If there is no signal from the vehicle speed sensor with these conditions satisfied, the ecm concludes that there is a fault in the vehicle speed sensor. The ecm will turn on the mil and a dtc is set.

Not equipped with abs:

the ecm assumes that the vehicle is driven when the park/neutral position switch is off and it has been over 4 seconds since the actual vehicle speed was 9 km/h or more.

If there is no signal from the vehicle speed sensor with these conditions satisfied, the ecm concludes that there is a fault in the vehicle speed sensor. The ecm will turn on the mil and a dtc is set.

Monitor strategy

Typical enabling conditions

Typical enabling conditions

Typical malfunction thresholds

Typical malfunction thresholds

Wiring diagram

Wiring diagram

Inspection procedure

Vehicle speed sensor a
Dtc p0500 vehicle speed sensor a ...

Inspection procedure
Hint: read freeze frame data using the hand-held tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is usefu ...

Other materials:

Roof drip side finish moulding center lh
Replacement Hint: use the same procedures for the rh side and lh side. The installation procedures are the removal procedures in reverse order. However, only installation procedures requiring additional information are included. 1. Remove roof drip side finish moulding center lh ...

Replacement
Hint: components:  1. Remove front wheel 2. Remove front axle hub lh nut  sst 0993000010 3. Separate front stabilizer link assy lh 4. Separate speed sensor front lh (w/ abs) 5. Separate front disc brake caliper assy lh Remove the 2 bolts, separate the brake caliper assy l ...

Check mode procedure
1. Dtc check (check mode) Hint: handheld tester only: compared to the normal mode, the check mode has more sensing ability to detect malfunctions. Furthermore, the same diagnostic items which are detected in the normal mode can also be detected in the check mode. Procedure for check mod ...

2011-2021 Copyright www.tcorolla.net