Dodge Dakota (ND). Manual — part 960

U0100 LOST COMMUNICATION WITH ECM/PCM (CONTINUED)

For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - SCHE-
MATICS AND DIAGRAMS)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
Every 7 msec with:
1) Engine speed greater than 500 RPM.
2) Battery voltage between 10 and 16 volts.

•

Set Condition:
CAN C bus messages are not received for 10 seconds.

Theory of Operation

The NGC controller communicates over the CAN C bus. The transmission controller continuously monitors bus
activity. The CAN C bus is also used to communicate transmission MIL status to the Engine Controller. If the Engine
Controller is unable to communicate with the Transmission Controller, a DTC will set and the Engine Controller will
illuminate the MIL.

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

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AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS

ND

U0002 CAN C BUS OFF PERFORMANCE

ND

AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS

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U0002 CAN C BUS OFF PERFORMANCE (CONTINUED)

For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - SCHE-
MATICS AND DIAGRAMS)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
Every 7 msec with:
1) Engine speed greater than 500 RPM.
2) Battery voltage between 10 and 16 volts.

•

Set Condition:
CAN C bus messages are not received for 10 seconds.

Theory of Operation

The NGC controller communicates over the CAN C bus. The transmission controller continuously monitors bus
activity. The CAN C bus is also used to communicate transmission MIL status to the Engine Controller. If the Engine
Controller is unable to communicate with the Transmission Controller, a DTC will set and the Engine Controller will
illuminate 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.

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AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS

ND

U0121 LOST COMMUNICATION WITH ABS

ND

AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS

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