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 |
A group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection logic. |
|
Typical Enabling Conditions |
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 |
Order of monitor priority, applied if multiple sensors and components are involved in a single malfunction detection process. Each sensor and component is monitored in turn and subsequent items are not monitored until the previous detection operation completes. |
|
Required Sensors/Components |
Sensors and components used by the ECM to detect each malfunction. |
|
Frequency of Operation |
Number of times the ECM checks for each malfunction during each driving cycle. "Once per driving cycle" means that the ECM only checks for malfunctions once during a single driving cycle. "Continuous" means that the ECM checks for malfunctions whenever enabling conditions are met. |
|
Duration |
Minimum time for which the ECM must detect continuous deviation in monitored value(s) in order to store a DTC. Timing begins when 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 |
Timing of MIL illumination after a malfunction is detected. "Immediate" means that the ECM illuminates the MIL as soon as a malfunction is detected. "2 driving cycles" means that the ECM illuminates the MIL if the same malfunction is detected again during the next driving cycle. |
Precaution
PRECAUTION
IGNITION SWITCH EXPRESSIONS
(a) The type of ignition switch used on this model differs according to the specifications
of the vehicle. The expressions listed in the table below are used ...
Parts Location
PARTS LOCATION
ILLUSTRATION
*A
for Hydraulic Brake Booster
*B
for Vacuum Brake Booster
*C
for Automatic Transmission
...
Other materials:
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) The steering lock ECU (steering lock actuator or UPR bracket assembly) stores
DTCs when a malfunction occurs in the system. These DTCs can be confirmed by using
the Techstream.
NOTICE:
When using the Techstream with the engine switch off to confirm ...
Side Airbag Sensor RH Circuit Malfunction (B1620/21)
DESCRIPTION
The side airbag sensor assembly RH consists of parts such as the safing sensor,
the diagnostic circuit and the lateral deceleration sensor.
When the airbag sensor assembly receives signals from the lateral deceleration
sensor, it determines whether or not the SRS should be activate ...
Operation Check
OPERATION CHECK
1. CHECK REMOTE CONTROL MIRROR FUNCTION
(a) Turn the ignition switch to ON.
(b) With L on the mirror select switch selected, check that the outer rear view
mirror assembly LH surface moves up, down, left and right normally.
(c) With R on the mirror select switch selected, check ...