DTC Toyota B1861-64 Short Explanation
Channel: Maxidot Dodge
Date: 2020-09-03

The video focuses on the basic Toyota specific diagnostic error code.
Contents:
0:21 Basic DTC analysis according to OBD2 protocol standard.
1:48 Insight into programming
- an explanation of what a bit is and how a byte is formed
- decoding the Error Code to the base programming
2:58 A diagnostically understandable description of the Diagnostic Trouble Code
3:05 Basic error definition
- Possible causes or errors of the car and its parts describing the mentioned error

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Make:
Toyota
Code:
B1861 64
Definition:
Cylinder 1 Deactivation Control Performance
Description:
When all criteria has been met, power is supplied to each MDS Solenoid when the engine is making a transition from 8 cylinder mode to 4 cylinder mode. By actuating the solenoid, oil pressure is raised to the pair of lifters that coincide with each particular solenoid. The oil pressure pushes in the locking pins that allows the lifter to collapse, decoupling the valves and camshaft.
Cause:
MDS SOLENOID 1 CONTROL SHORTED TO GROUNDMDS SOLENOID 1 CONTROL OPENGROUND CIRCUIT OPENINSUFFICIENT OIL PRESSURE ACTING ON THE LIFTER LOCKING PINSOIL PASSAGES RESTRICTEDLIFTERMDS SOLENOIDPOWERTRAIN CONTROL MODULE (PCM)
Failure Type:
Signal Plausibility Failure
This sub type is used for failures where the control module detects a single input parameter for plausibility.