DTC Mercury B1202 Short Explanation
Channel: Maxidot
Date: 23/07/2020

The video focuses on the basic Mercury 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
Mercury
Code
B1202
Definition
System Voltage High Input
Description
The purpose of the System Voltage is to detect an excessively low or high system voltage that may be caused by a malfunctioning charging system  System Voltage is the ignition voltage potential at the Powertrain Control Module ECMECM measures and compares voltage from ignition key and each relay  With this mechanism,  ECM knows if the main relay switch turns on after IG on or if turns OFF after IG off  If the system voltage is over 17 V during 02 sec,  ECM sets DTC P0563
Cause
 Poor connection  Charging system  Main relay  ECM or PCM has failed