Ok , ill look it up.
i can tell you it means to do other tests to prove the part that is bad)
no engine stated
no transmission. NAG1? but is 2wd, a win there.
U0404-IMPLAUSIBLE DATA RECEIVED FROM ESM
more clear?>
read the FSM yet (factory serv. man/)?
here is an excepted cut....
U0404-IMPLAUSIBLE DATA RECEIVED FROM ESM (CONTINUED)
For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - SCHEMATICS
AND DIAGRAMS)
For a complete wiring diagram Refer to Section 8W
Theory of Operation
The messages sent on the CAN bus are distinguished by an identifier (ID). Each CAN ID is defined to contain a
certain number of bytes. The Transmission Control Module (TCM) verifies that it has received the proper number of
bytes for each ID.
² When Monitored:
Continuously with the ignition on, one valid CAN ID received at least once, and no U0002-CAN Bus Off Performance
DTC present.
² Set Condition:
When the TCM detects an incorrect CAN ID from the Electronic Shift Module (ESM).
Possible Causes
FCM CAN BUS DTC'S PRESENT
ELECTRONIC SHIFT MODULE DTC'S PRESENT
TRANSMISSION CONTROL MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE
clear as mud?
get it service? any ASE shop can do this. ask them?
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U0404 Invalid Data Received from Gear Shift Control Module
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