VIDEO

Informace

Chrysler

Chrysler B1678

See the basic definition of a diagnostic error. This will help you to clarify the main causes of the fault code. You will understand the program of the control unit
Basic DTC analysis according to OBD2 protocol standard.

OBD2 or On-Board Diagnostics displays messages for basic group styles. More comprehensible code composition has been standard since 2000. The DTC code consists of five characters and its composition will be shown in this video

Insight into programming

The basic unit for the operation of any computer is the bit. Logic 0 and 1 are expressed by a single bit. Diagnostics The error code is composed of 16 bits. The first two bits define one of the four basic circuits. The video will show you a comprehensive overview of the composition of the error report

A diagnostically understandable description of the Diagnostic Trouble Code

Chrysler B1678

Basic error definition

4WD Low Switch Circuit Fault

Cause of DTC

DTC P0122, P0123, P0502, P0503, P0740, P0742, P0751, P0752, P0756, P0758, P1810, P1860 and P1870 not set, engine started, vehicle driven to a speed over 7 MPH for 5 seconds, gear range is D4, Fuel Cutoff not active, TP angle from 17-50%, engine torque from 50-400 lb ft, engine vacuum from 0-105 kPa, shift solenoid performance counters at zero, TFT sensor from 68-266°F, then during Condition 1 with the 4WD Low switch in 4WD low, transfer case not in 4WD low, TCC slip speed from -3000 to -50 RPM, the ECM detected the speed ratio was 0.8-1.2; or during Condition 2 with the 4WD Low switch not in 4WD low, transfer case in 4WD low, TCC commanded on, TCC slip speed was 100 to 3000 RPM, the ECM detected the speed ratio was 2.5-2.9 for 10 seconds.