Toyota RAV4 manuals

Toyota Sienna Service Manual: Communication Error from ECM to VSC

DTC P1631 Communication Error from ECM to VSC

DTC U0100 Lost Communication with ECM/PCM "A"

DESCRIPTION

The ECM sends signals such as A/T information signals, dynamic laser cruise control operation signals, brake operation demand signals, and buzzer operation demand signals to the skid control ECU when the dynamic laser cruise control is in operation. The ECM is the only component that has a function to record and output the DTCs in the dynamic laser cruise control system. Therefore, if the skid control ECU detects a communication error from the ECM, it sends a malfunction signal back to the ECM.

DTC No.

DTC Detection Condition

Trouble Area

P1631

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

U0100

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

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

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 ...

Communication Error of Yaw Rate Sensor
DTC U0123 Communication Error of Yaw Rate Sensor DESCRIPTION This circuit detects the yaw rate of the vehicle and transmits its signal to the skid control ECU and distance control ECU. ...

Other materials:

Resetting BMW Digital Key
To reset BMW Digital Key, an authorized vehicle key must be located in the vehicle. After the reset, the vehicle can no longer be unlocked, locked or started with a digital key. The vehicle owner must present proof of authorization for his vehicle again at the service center to be able to use BMW ...

Diagnostic trouble code chart
1. DTCS FOR AIRBAG SYSTEM If a malfunction code is displayed during the DTC check, check the circuit listed for the code in the table below (Proceed to the page listed for that circuit). HINT:  When the SRS warning light remains on and the DTC output is the normal system code, a volta ...

Master Cylinder Pressure Sensor Malfunction
DTC C1246/46 Master Cylinder Pressure Sensor Malfunction DESCRIPTION Master cylinder pressure sensor is connected to the skid control ECU in the actuator. INSPECTION PROCEDURE 1 READ VALUE ON INTELLIGENT TESTER (MASTER CYLINDER PRESSURE SENSOR) (a) Connect the intelligent tester to the DL ...

В© 2011-2022 Copyright www.tsienna.net