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Toyota Sienna Service Manual: Communication Error from VSC to ECM

DTC P1630 Communication Error from VSC to ECM

DTC U0122 Lost Communication with Vehicle Dynamics Control Module

DESCRIPTION

The skid control ECU sends signals such as cruise control cancel demand signals and brake operation demand (from ECM) response signals to the ECM when the dynamic laser cruise control system is in operation.

DTC No.

DTC Detection Condition

Trouble Area

P1630

While the dynamic laser cruise control is either preparing for operation or operating, if communication data from the skid control ECU is logically inconsistent for a certain amount of time, the ECM records this logical error code
  • Communication circuit
  •  ABS & traction actuator (Skid control ECU)
  •  ECM

U0122

While dynamic laser cruise control is either preparing for operation or operating, if communication data from the skid control ECU is invalid for a certain amount of time, the ECM records this communication cut off code
  • Communication circuit
  •  ABS & traction actuator (Skid control ECU)
  •  ECM

INSPECTION PROCEDURE

HINT: This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output.

1 CHECK CAN COMMUNICATION SYSTEM

Refer to HOW TO PROCEED WITH TROUBLESHOOTING

END

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Other materials:

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Problem symptoms table
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