Lexus ES: Lost Communication with ECM/PCM "A" Missing Message (U010087)
DESCRIPTION
The battery ECU assembly transmits and receives signals via CAN communication to and from the ECM.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| U010087 | Lost Communication with ECM/PCM "A" Missing Message | A CAN communication error between the battery ECU assembly and ECM (CAN communication system malfunction) occurs (1 trip detection logic) | CAN communication system | Comes on | Master Warning Light: Comes on |
MONITOR DESCRIPTION
If the battery ECU assembly detects a problem with CAN communication with the ECU, it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
| Related DTCs | U0100 (INF U010087): Lost communication with ECM/PCM |
| Required sensors/components | Battery ECU assembly |
| Frequency of operation | Continuous |
| Duration | TMC's intellectual property |
| MIL operation | Immediately |
| Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
| The monitor will run whenever the following DTCs are not stored | TMC's intellectual property |
| Other conditions belong to TMC's intellectual property | - |
TYPICAL MALFUNCTION THRESHOLDS
| TMC's intellectual property | - |
COMPONENT OPERATING RANGE
| Battery ECU assembly | DTC U0100 (INF U010087) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
.gif)
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for 2 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
-
With power switch on (IG) and wait for 2 minutes or more.[*1]
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
-
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
PROCEDURE
| 1. | CHECK DTC OUTPUT (HV BATTERY) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / HV Battery / Trouble Codes.
(d) Check for DTCs.
Powertrain > HV Battery > Trouble Codes(e) Turn the power switch off.
| NEXT | .gif) | GO TO CAN COMMUNICATION SYSTEM |
READ NEXT:
Lost Communication with Hybrid/EV Powertrain Control Module Missing Message (U029387)
DESCRIPTION The battery ECU assembly transmits and receives signals via CAN communication to and from the hybrid vehicle control ECU. DTC No. Detection Item DTC Detection Condition Trouble Ar
Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message (U115087)
DESCRIPTION The battery ECU assembly transmits and receives signals via CAN communication to and from the hybrid vehicle control ECU. DTC No. Detection Item DTC Detection Condition Trouble Ar
"HAVE TRACTION BATTERY INSPECTED" is displayed
DESCRIPTION The battery ECU assembly monitors the SOC (state of charge) of the HV battery. When it finds the HV battery has deteriorated excessively, it will display "Have Traction Battery Inspected"
SEE MORE:
Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device
PROCEDURE 1. CHECK USING ANOTHER "Bluetooth" AUDIO COMPATIBLE VEHICLE OF SAME MODEL (a) Check if track information is displayed normally on another "Bluetooth" audio compatible vehicle of the same model. OK: Track information is displayed normally. OK PROCEED TO NEXT SUSPECTED AREA
Evaporative Emission Fuel Tank (Small Leak) (P142200,P142300)
DTC SUMMARY DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P142200 Evaporative Emission Fuel Tank (Small Leak) Leak detection pump creates negative pressure (vacuum) in fuel tank and fuel tank pressure is measured. Reference pressure is measured at
