Toyota Tacoma (2015-2018) Service Manual: 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 |
Group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection logic. |
|
Typical enabling condition |
Preconditions that allow the ECM to detect malfunctions. With all preconditions satisfied, the ECM stores a DTC when the monitored value(s) exceeds the malfunction threshold(s). |
|
Sequence of operation |
The priority order that is applied to monitoring if multiple sensors and components are used to detect the malfunction. While one sensor is being monitored, the next sensor or component will not be monitored. |
|
Required sensor / Components |
The sensors and components that are used by the ECM to detect malfunctions. |
|
Frequency of operation |
The number of times that the ECM checks for malfunctions per driving cycle. "Once per driving cycle" means that the ECM detects a malfunction only once during a single driving cycle. "Continuous" means that the ECM detects a malfunction every time the enabling conditions are met. |
|
Duration |
The minimum time for which the ECM must detect a continuous deviation in the monitored value(s) in order to store a DTC. Timing begins after the "typical enabling conditions" are met. |
|
Typical malfunction thresholds |
Value beyond which the ECM will determine that there is a malfunction and store a DTC. |
|
MIL operation |
MIL illumination timing after a malfunction is detected. "Immediate" means that the ECM illuminates the MIL the instant the ECM determines that there is a malfunction. "2 driving cycles" means that the ECM illuminates the MIL if the same malfunction is detected again in the next driving cycle. |
|
Component operating range |
Normal operation range of sensors and solenoids under normal driving conditions. Use these ranges as a reference. They cannot be used to judge if a sensor or solenoid is defective or not. |
Parts Location
PARTS LOCATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
...
Other materials:
System Diagram
SYSTEM DIAGRAM
Transmitting ECU (Transmitter)
Receiving ECU
Signals
Communication Method
ECM
Skid control ECU
Throttle position signal
Engine speed signal
Accelerator pedal position ...
System Description
SYSTEM DESCRIPTION
PRE-COLLISION SYSTEM DESCRIPTION
(a) The pre-collision system uses the pre-collision warning control, pre-collision
brake assist control and pre-collision braking control to help avoid a collision
or reduce the impact if it determines that the possibility of a collision is h ...
ACC Monitor Malfunction (B2274)
DESCRIPTION
This DTC is stored when a malfunction in the ACC output circuit is detected.
The ACC output circuit is the circuit that goes from the ACC output terminal of
the certification ECU (smart key ECU assembly) to the ACC relay.
HINT:
When the cable is disconnected and reconnected to the ...
