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:
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful because intermittent conditions or signals ...
Meter Illumination does not Dim at Night
DESCRIPTION
In this circuit, the combination meter assembly auto dimmer signals from the
main body ECU using the CAN communication system (CAN V1 Bus). When the combination
meter assembly an auto dimmer signal, it dims the meter illumination (warning and
indicator lights). The main body ECU ( ...
Short in Curtain Shield Squib LH Circuit (B1835/58-B1838/58)
DESCRIPTION
The driver side curtain shield squib circuit consists of the airbag sensor assembly
and the curtain shield airbag assembly LH.
The circuit signals the SRS to deploy when airbag deployment conditions are met.
These DTCs are set when a malfunction is detected in the driver side curtai ...
