Toyota Tacoma 2015-2018 Service Manual: Diagnosis System
DIAGNOSIS SYSTEM
1. DIAGNOSIS
(a) If the skid control ECU (master cylinder solenoid) detects a malfunction, the ABS and/or BRAKE warning lights and the slip indicator lights come on in accordance with the trouble area to warn the driver.
HINT:
- The DTCs are simultaneously stored in the memory. The DTCs can be read by connecting the Techstream.
- This system has a Test Mode sensor signal check function. Test mode DTCs can be read by connecting the Techstream and observing the blinking pattern of the ABS warning light and slip indicator light.
NOTICE:
If parts connected to the IG terminal circuit are damaged due to high voltage, DTCs may not be able to be output from the ABS warning light and slip indicator light by connecting SST to the DLC3. In this case, inspect the IG power source circuit.
2. WARNING LIGHT AND INDICATOR LIGHT CHECK
(a) Release the parking brake.
CAUTION:
When releasing the parking brake, set chocks to hold the vehicle for safety.
HINT:
When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light comes on.
(b) Check that the ABS warning light, BRAKE warning light and slip indicator light come on when the ignition switch is turned to ON, and go off in approximately 3 seconds.
HINT:
If the indicator remains on or does not come on, proceed to troubleshooting for the light circuit below.
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Trouble Area |
See Page |
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ABS warning light circuit (Remains on) |
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ABS warning light circuit (Does not come on) |
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BRAKE warning light circuit (Remains on) |
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BRAKE warning light circuit (Does not come on) |
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Slip indicator light circuit (Remains on) |
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Slip indicator light circuit (Does not come on) |
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Terminals Of Ecu
TERMINALS OF ECU
1. TERMINALS OF ECU
Text in Illustration
*a
Component without harness connected
(Skid Control ECU (Master Cylinder Solenoid))
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-
...
Dtc Check / Clear
DTC CHECK / CLEAR
1. DTC CHECK / CLEAR (when Using Techstream)
(a) Check for DTCs.
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn the Techstream on.
(4) Ent ...
Other materials:
Definition Of Terms
DEFINITION OF TERMS
Term
Definition
Monitor Description
Description of what the ECM monitors and how it detects malfunctions
(monitoring purpose and details).
Related DTCs
A group of diagnostic trouble codes that are ...
Vehicle Speed Sensor "A" No Signal (P050031)
DESCRIPTION
The speed sensor detects the wheel speed and sends the appropriate signals to
the skid control ECU. The skid control ECU converts these wheel speed signals into
a pulse signal and outputs it to the ECM via the combination meter. The ECM determines
the vehicle speed based on the fr ...
Body
General Maintenance
GENERAL MAINTENANCE
PROCEDURE
1. TIGHTEN BOLTS AND NUTS ON CHASSIS AND BODY
(a) Tighten the bolts and nuts on the chassis parts listed below, if necessary.
Front axle and suspension
Drive train
Rear axle and suspension
Brake system
Engine mounting
...
