Tacoma

Toyota Tacoma 2015-2018 Brake Workshop Manual

TROUBLE AREA SEE PROCEDURE
TS and CG terminal circuit
ABS warning light circuit (Remains on)
ABS warning light circuit (Does not come on)
Slip indicator light circuit (Remains on)
Slip indicator light circuit (Does not come on)
4. ACCELERATION SENSOR CHECK
(a) Enter Test Mode (signal check).
(b) Keep the vehicle stationary on a level surface for 1 second or more.
HINT:
The acceleration sensor check can be performed with the master cylinder pressure sensor check below.
5. MASTER CYLINDER PRESSURE SENSOR CHECK
(a) Enter Test Mode (signal check).
(b) Start the engine.
(c) Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly
and continuously depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second.
(d) Check that the ABS warning light stays on for 3 seconds.
HINT:
Ensure that the ABS warning light comes on.
While the ABS warning light stays on, continue to depress the brake pedal with a force of 98 N (10 kgf, 22
lbf) or more.
The ABS warning light comes on for 3 seconds every time the brake pedal operation above is performed.
If the master cylinder pressure sensor check is not completed, depressing the brake pedal causes further
decreases in vacuum in the brake booster, making the sensor check difficult to complete.
If the vacuum is insufficient, the master cylinder pressure sensor check may not be completed. In this
case, run the engine at idle to obtain sufficient vacuum.
If the brake pedal is strongly depressed when the vacuum is insufficient, the brake warning light may come
on in accordance with booster pressure control. In this case, run the engine at idle to obtain sufficient
vacuum.
6. SPEED SENSOR CHECK
NOTICE:
Before performing the speed sensor signal check, complete the acceleration sensor and master cylinder
pressure sensor checks.
(a) Enter Test Mode (signal check).
(b) Start the engine.
(c) Drive the vehicle straight ahead.
Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds and check that the ABS
warning light goes off.
The sensor check may not be completed if wheelspin occurs.
The ABS warning light blinks when the sensor check has been completed and the brake pedal is
depressed.
The ABS warning light comes on immediately after a malfunction has been detected during the
speed sensor check.
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