Toyota Sienna Service Manual: ECM Communication Circuit Malfunction
DTC C1203/53 ECM Communication Circuit Malfunction
DESCRIPTION
The circuit is used to send TRAC and VSC control information from the skid
control ECU to the ECM, and
engine control information from the ECM to the skid control ECU through the CAN
communication
system.
INSPECTION PROCEDURE
1 CHECK PART NUMBER (ECM AND BRAKE ACTUATOR ASSEMBLY)
(a) Check that the proper ECM and brake actuator assembly (skid control ECU) are installed.
OK: Proper ECUs are installed.
REPLACE ECM
Engine Control System Malfunction
DTC C1201/51 Engine Control System Malfunction
DESCRIPTION
If trouble occurs the engine control system, the ECM transmits the
abnormality to the skid control ECU.
The skid control ECU set this ...
Zero Point Calibration of Yaw Rate Sensor Undone
DESCRIPTION
The skid control ECU receives signals from the yaw rate sensor via CAN
communication system.
Yaw rate sensor has the built-in deceleration sensor.
If there is trouble in the b ...
Other materials:
Front Clearance Sonar Sensor RH Circuit
DESCRIPTION
An ultrasonic sensor consists of a sensor portion that transmits and receives
ultrasonic waves and a preamplifier
that amplifies them. The ultrasonic sensor outputs the ultrasonic waves and
sends the reveiced
signals to the clearance warning ECU.
WIRING DIAGRAM
INSPECTION PR ...
Short in Driver Side Squib Circuit
DTC B0100/13 Short in Driver Side Squib Circuit
DESCRIPTION
The driver side squib circuit consists of the center airbag sensor assembly,
the spiral cable and the
steering pad. The circuit instructs the SRS to deploy when deployment conditions
are met. DTC B0100/13
is recorded when a short ci ...
Problem symptoms table
HINT:
If a normal code is displayed during the diagnostic trouble
code check although the trouble still occurs, check the
electrical circuits for each symptom in the order given in
the charts on the following pages and proceed to the page
given for troubleshooting.
The Matrix Chart is ...
