DTC Oldsmobile P1644 Short Explanation
The video focuses on the basic Oldsmobile 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:
Oldsmobile
Code:
P1644
Definition:
Auto Shutdown Relay Control Circuit Malfunction
Description:
Key on or engine cranking;and the PCM detected an unexpected voltage condition on the ASD Relay Control circuit.The ASD Relay coil resistance is 95-105 ohms at 68ºF.
Cause:
ASD relay control circuit is open between the relay and PCMASD relay control circuit is shorted to groundASD relay power circuit is open (test power from Fused B+)ASD relay is damaged or has failedPCM has failed