Toyota Yaris: Dynamic Radar Cruise Control System / Lost Communication with ECM/PCM "A" Missing Message (U010087,U010487,U012287)
DESCRIPTION
The ECM communicates with each sensor and ECU via CAN communication.
If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
|---|---|---|---|---|
| U010087 | Lost Communication with ECM/PCM "A" Missing Message | When the dynamic radar cruise control system is operating, a communication malfunction between the skid control ECU (brake actuator assembly) and ECM is detected for approximately 1 second or more. | CAN communication system | Radar Cruise1 |
| U010487 | Lost Communication with Cruise Control Module Missing Message | When the ignition switch is ON and the dynamic radar cruise control system is operating, a communication malfunction between the millimeter wave radar sensor assembly and ECM is detected for approximately 1 second or more. | CAN communication system | Radar Cruise1 |
| U012287 | Lost Communication with Vehicle Dynamics Control Module Missing Message | When the ignition switch is ON and the dynamic radar cruise control system is operating, a communication malfunction between the skid control ECU (brake actuator assembly) and ECM is detected for approximately 2.6 seconds or more. | CAN communication system | Radar Cruise1 |
PROCEDURE
| 1. | CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Radar Cruise1 > Clear DTCs
|
| 2. | CHECK FOR DTCs |
(a) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(b) Check for DTCs.
Powertrain > Radar Cruise1 > Trouble Codes| Result | Proceed to |
|---|---|
| DTC U010087, U010487 or U012287 is output | A |
| DTCs are not output | B |
| None of the above conditions are met | C |
| A |
 | GO TO CAN COMMUNICATION SYSTEM |
| B |
 | USE SIMULATION METHOD TO CHECK |
| C |
 | GO TO DTC CHART |
Communication Error from ECM to VSC Invalid Serial Data Received (P163181)
DESCRIPTION The skid control ECU (brake actuator assembly) sends signals such as brake request signals to the ECM. When the ECM detects logic error signals sent from the skid control ECU (brake actuator assembly) for a certain period of time, DTC P163181 is stored...
Lost Communication with ECM/PCM "A" Missing Message (U010087,U012687,U012987,U015587)
DESCRIPTION The millimeter wave radar sensor assembly communicates with each sensor and ECU via CAN communication. If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored...
Other information:
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