Lexus ES: Lost Communication With ECM/PCM "A" Missing Message (U010087,U012987,U014087,U016487)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the CAN communication circuit.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U010087 | Lost Communication With ECM/PCM "A" Missing Message | Stereo component equalizer assembly detects CAN communication malfunction in engine system for 1 second or more continuously, 3 seconds or more after engine switch is turned on (IG)* | CAN communication system |
| U012987 | Lost Communication With Brake System Control Module Missing Message | Stereo component equalizer assembly detects CAN communication malfunction in brake system for 1 second or more continuously, 3 seconds or more after engine switch is turned on (IG)* | CAN communication system |
| U014087 | Lost Communication with Body Control Module Missing Message | Stereo component equalizer assembly detects CAN communication malfunction in main body ECU for 3 seconds or more continuously, 3 seconds or more after engine switch is turned on (IG)* | CAN communication system |
| U016487 | Lost Communication with HVAC Control Module Missing Message | Stereo component equalizer assembly detects CAN communication malfunction in the air conditioning system for 25 seconds or more continuously 3 seconds after the engine switch is turned on (IG)* | CAN communication system |
HINT:
*: Malfunction monitoring is not performed under the following conditions, in order to prevent erroneous detection.
- After engine switch is turned on (ACC) for 3 seconds or more.
- After the battery voltage returns to normal for 3 seconds.
- Before 3 seconds have elapsed after battery voltage has returned to normal.
PROCEDURE
| 1. | CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Active Noise Control > Clear DTCs
|
| 2. | CHECK FOR DTC |
(a) Check for DTCs with all of the detection conditions met.
Body Electrical > Active Noise Control > Trouble CodesOK:
No DTCs are output.
HINT:
- If CAN communication system malfunction DTCs are output, they may also be output for other systems.
- If the CAN communication system has been checked and repaired in other systems, the DTC will not be output after rechecking for DTCs.
-
If the DTC is output frequently, duplicate the conditions that cause a malfunction and perform the check again, even though the DTC was not output after rechecking for DTCs.
Click here
.gif)
| OK |  | USE SIMULATION METHOD TO CHECK |
| NG | | GO TO CAN COMMUNICATION SYSTEM |
READ NEXT:
ANC ECU EEPROM Data Memory Failure (B1AA044)
DESCRIPTION This DTC is stored when a malfunction occurs in the stereo component equalizer assembly. DTC No. Detection Item DTC Detection Condition Trouble Area B1AA044 ANC ECU EEPROM D
UART Communication Between ANC and Audio Amplifier Missing Message (B1AA187)
DESCRIPTION This DTC is stored when an UART communication error occurs between the stereo component equalizer assembly and stereo component amplifier assembly. DTC No. Detection Item DTC Detect
SEE MORE:
Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range (P0ABF2A)
DESCRIPTION Refer to the description for DTC P0ABF11. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate P0ABF2A Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range The battery current sensor output is stuck even when battery vol
Operation Check
OPERATION CHECK CHECK ELECTRICAL REMOTE CONTROL MIRROR FUNCTION (a) Turn the engine switch on (IG). (b) b. With the mirror select switch driver side switch on, check that the outer rear view mirror assembly (driver door) surface moves up, down, left and right normally (c) With the mirror select swit
