Dodge Dakota (ND). Manual - part 1071

U0121–LOST COMMUNICATION WITH ABS

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AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS

U0121–LOST COMMUNICATION WITH ABS (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.

Refer to 8-ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic pro-
cedures and for further possible causes.

AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS

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U0141 LOST COMMUNICATION WITH FCM

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AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS

U0141 LOST COMMUNICATION WITH FCM (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

Refer to 8-ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic pro-
cedures and for further possible causes.

AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS

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