Toyota Camry (XV70): 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 |
Cruise Control |
|
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 forward recognition camera and ECM is detected for approximately 1 second or more. |
CAN communication system |
Cruise Control |
|
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 3 seconds or more. |
CAN communication system |
Cruise Control |
PROCEDURE
| 1. |
CHECK FOR DTCs (Radar Cruise1) |
(a) Clear the DTCs.
Powertrain > Cruise Control > Clear DTCs(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Powertrain > Cruise Control > Trouble Codes|
Result | Proceed to |
|---|---|
|
CAN communication system DTC is not output |
A |
| CAN communication system DTC is output |
B |
| A |
.gif) | USE SIMULATION METHOD TO CHECK
|
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| B |
| GO TO CAN COMMUNICATION SYSTEM |
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Internal Control Module Software Incompatibility Not Programmed (U030051,U030057)
DESCRIPTION
If the forward recognition camera cannot verify the vehicle information sent from the ECM, the forward recognition camera stores DTC U030051.
If the vehicle information stored in
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Removal
REMOVAL CAUTION / NOTICE / HINT
The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during fuel injector assembly removal/installation are shown below. Necessary Procedures After Parts Removed/
Terminals Of Ecu
TERMINALS OF ECU
NOTICE:
DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed.
Do not apply excessive force to the millimeter wave radar sensor assembly connector.
CHECK
