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 |
|
|
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 |
|
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:
Air conditioning controls
Adjusting the temperature setting
Press “” on the “TEMP” button to
increase the temperature and “”
to decrease the temperature.
Adjusting the fan speed
Press “” on
to increase the fan speed and “”
to decrease
the fan speed.
Press the “OFF” button to turn the ...
Oil and oil filter
COMPONENTS
REPLACEMENT
CAUTION:
Prolonged and repeated contact with engine oil will
result in the removal of natural oils from the skin,
leading to dryness, irritation and dermatitis. In
addition, used engine oil contains potentially harmful
contaminants which may caus ...
Camshaft Position Sensor "A" Circuit
DTC P0340 Camshaft Position Sensor "A" Circuit (Bank 1
or Single Sensor)
DTC P0342 Camshaft Position Sensor "A" Circuit Low
Input (Bank 1 or Single Sensor)
DTC P0343 Camshaft Position Sensor "A" Circuit High
Input (Bank 1 or Single Sensor)
DTC P0345 Camshaft Posit ...