VIDEO

Informace

Honda

Honda P0748

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

Honda P0748

Basic error definition

Heated Rear Window Relay-Circuit Short To Battery

Cause of DTC

The Rear Defogger Switch is located in the A C and Heater Control, which sends Climate Control requests to the HVAC Module. When the Body Control Module (BCM) receives CAN Bus message from the HVAC Module, requesting Rear Window Defogger operation, the BCM will provide a ground signal through the Rear Window Defogger Relay Control circuit to activate the Rear Defrost Relay, located in the Rear Power Distribution Center (PDC) Assembly. When the Rear Defrost Relay is activated, the relay provides battery voltage through the Rear Window Defogger Control Output circuit, to the Rear Window Defogger and through the De-Icer Supply circuit to the Passenger and Driver Exterior Rearview Mirrors and if equipped, the Washer Nozzle Heaters.