Toyota Tacoma manuals

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.

Automatic Transmission System(for 2gr-fks)
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Parts Location
PARTS LOCATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ...

Other materials:

Pressure Sensor or Switch (C1254)
DESCRIPTION The accumulator pressure sensor is connected to the skid control ECU in the master cylinder solenoid. DTC No. DTC Detecting Condition Trouble Areas C1254 Accumulator pressure sensor fault (Fluid pressure does not chang ...

New Key cannot be Registered
DESCRIPTION If an electrical key transmitter could not be newly registered, wave interference or a malfunction of the certification ECU (smart key ECU assembly), electrical key transmitter sub-assembly, steering lock ECU (steering lock actuator or UPR bracket assembly) or electrical key and T ...

Speaker Output Short (B15C3)
DESCRIPTION This DTC is stored when a malfunction occurs in the speakers. DTC No. DTC Detection Condition Trouble Area B15C3 A short is detected in the speaker output circuit. Harness or connector Speaker ...

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