DTC Isuzu P0440 Short Explanation
Channel: Maxidot Saturn
Date: 2020-06-21

The video focuses on the basic Isuzu 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:
Isuzu
Code:
P0440
Definition:
Lost Communication With Sunroof Control Module (SUNR)
Description:
The primary communication network between electronic control modules on this vehicle is the Controller Area Network (CAN) data bus system. The Controller Area Network (CAN) data bus allows all electronic modules connected to the bus to share information with each other. Regardless of whether a message originates from a module on the higher speed CAN C (500K) Bus or on the lower speed CAN Interior High Speed (IHS) (125K) Bus the message structure and layout is similar, which allows the Totally Integrated Power Module or Central GateWay (TIPM or TIPMCGW) to process and transfer messages between the CAN buses. The TIPM also stores Diagnostic Trouble Codes (DTCs) for certain bus network faults.
Cause:
(D265) Can Interior Bus (+) (125K) Circuit Shorted To Voltage(D264) Can Interior Bus (-) (125K) Circuit Shorted To GroundDtcs