Dodge Dakota (ND). Manual — part 1070
U0002 CAN C BUS OFF PERFORMANCE
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AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS
ND
U0002 CAN C BUS OFF PERFORMANCE (CONTINUED)
For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE -
SCHEMATICS AND DIAGRAMS)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Every 7 msec. Conditions: 1) Engine speed greater than 500 RPM. 2) Battery voltage greater than 10v but
less than 16v.
•
Set Condition:
CAN C bus messages not received for 10 seconds.
Theory of Operation
Some NGC controllers communicate with other controllers over the CAN C bus. The transmission controller contin-
uously monitors the bus activity and receives the messages it needs. The CAN C bus is also used to communicate
transmission MIL status to the Engine Controller, therefor if the Engine Controller is unable to communicate with the
Transmission Controller, the Engine Controller will light the MIL.
Diagnose the U0002 CAN C BUS OFF PERFORMANCE as the U0001 CAN C BUS CIRCUIT test in 8-ELEC-
TRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic procedures and for
further possible causes.
ND
AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS
21 - 673
U0100–NO COMMUNICATION WITH THE ECM/PCM
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AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS
ND
U0100–NO COMMUNICATION WITH THE ECM/PCM (CONTINUED)
For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE -
SCHEMATICS AND DIAGRAMS)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Every 7 msec. with the ignition on.
•
Set Condition:
ECM/PCM CAN bus message not received by the Transmission Control System for the period of 10 seconds.
Theory of Operation
Communication over the CAN bus is continuously monitored between the Engine Control System and the Trans-
mission Control System. Due to the integration of both systems into one module, (Powertrain Control Module) the
bus communication between the systems is internally transmitted over the duel port ram.
Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic
procedures and for further possible causes.
ND
AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS
21 - 675
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