Toyota CH-R Service Manual: Lost Communication with ECM / PCM "A" (U0100,U0125,U0126,U0129,U023A)

U0100

Lost Communication with ECM / PCM "A"

When driving the vehicle at a speed of 5 km/h (4 mph) or more, a communication error between the ECM and the millimeter wave radar sensor assembly is detected for approximately 5 seconds.

U0125

Lost Communication with Yaw Rate Sensor Module

When driving the vehicle at a speed of 5 km/h (4 mph) or more, a communication error between the yaw rate and acceleration sensor (airbag sensor assembly) and the millimeter wave radar sensor assembly is detected for approximately 1 second.

U0126

Lost Communication with Steering Angle Sensor Module

When the ignition switch is ON, a communication error between the steering angle sensor (spiral cable with sensor sub-assembly) and the millimeter wave radar sensor assembly is detected for approximately 4 seconds.

U0129

Lost Communication with Brake System Control Module

When the ignition switch is ON, a communication error between the skid control ECU (brake actuator assembly) and the millimeter wave radar sensor assembly is detected for approximately 3 seconds.

U023A

Lost Communication with Front Camera Module

After the ignition switch is turned ON, a communication malfunction occurs between the millimeter wave radar sensor assembly and forward recognition camera.

1.

CHECK FOR DTCs (PRE-COLLISION SYSTEM)

DTC U0100, U0125, U126 and U0129 are not output

A

DTC U0100, U0125, U126 or U0129 is output

B

USE SIMULATION METHOD TO CHECK

GO TO CAN COMMUNICATION SYSTEM