Toyota Tacoma (2015-2018) Service Manual: Check Mode Procedure
CHECK MODE PROCEDURE
1. DESCRIPTION
Check mode has a higher sensitivity to malfunctions and can detect malfunctions that cannot be detected in normal mode. Check mode can also detect all of the malfunctions that can be detected in normal mode. In check mode, DTCs are stored with 1 trip detection logic.
NOTICE:
- All DTCs and freeze frame data will be cleared if: 1) the Techstream is used to change the ECM from normal mode to check mode or vice versa; or 2) during check mode, the ignition switch is turned from ON to ACC or off.
- Before changing to check mode, make a note of the DTCs and freeze frame data.
2. CHECK MODE PROCEDURE
(a) Make sure that the following conditions are met:
(1) Battery voltage is 11 V or higher.
(2) The throttle valve is fully closed.
(3) The shift lever is in neutral.
(4) The A/C switch is off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Transmission / Utility / Check Mode.
(f) Check that the MIL flashes as shown in the illustration.
(g) Start the engine. The MIL should turn off after the engine starts.
(h) Simulate the conditions of the malfunction described by the customer.
(i) Using the Techstream, check for DTCs and freeze frame data.
Terminals Of Ecm
TERMINALS OF ECM
HINT:
The standard normal voltage between each pair of ECM terminals is shown in the
table below. The appropriate conditions for checking each pair of terminals are
also indic ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
NOTICE:
In the table below, the values listed under "Normal Condition" are reference
values. Do not depend solely on these reference values when dec ...
Other materials:
Multi-terrain Select Indicator Light Remains ON
DESCRIPTION
Refer to Multi-terrain Select Indicator Light does not Come ON (See page
).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (master cylinder solenoid), perform
calibration (See page
).
Inspect the fuses for circuits related ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT NO. 1 ULTRASONIC SENSOR
(a) Measure the resistance according to the value(s) in the table below.
Text in Illustration
*a
Component without harness connected:
(No. 1 Ultrasonic Sensor)
Standar ...
Front Occupant Classification Sensor RH Circuit Malfunction (B1781)
DESCRIPTION
The front occupant classification sensor RH circuit consists of the occupant
detection ECU and the front occupant classification sensor RH.
DTC B1781 is set when a malfunction is detected in the front occupant classification
sensor RH circuit.
DTC No.
DTC Det ...
