Toyota Corolla Cross: Lost Communication With ECM/PCM "A" Missing Message (U010087,U029387,U117008,U117087)
DESCRIPTION
The motor generator control ECU communicates with the hybrid vehicle control ECU, ECM and skid control ECU assembly via CAN communication.
|
DTC No. | Detection Item |
DTC Detection Condition |
Trouble Area | MIL |
Warning Indicate | Note |
|---|---|---|---|---|---|---|
|
U010087 | Lost Communication With ECM/PCM "A" Missing Message |
A CAN communication error between the ECM and motor generator control ECU (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system |
Comes on | Master Warning: Comes on | SAE Code: U0100 |
| U029387 |
Lost Communication With Hybrid Powertrain Control Module Missing Message |
A CAN communication error between the hybrid vehicle control ECU and motor generator control ECU (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system |
Comes on | Master Warning: Comes on | SAE Code: U0293 |
| U117008 |
Lost Communication with Brake System Control Module (ch2) Bus Signal / Message Failure |
A CAN communication error between the skid control ECU assembly and motor generator control ECU (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system |
Does not come on | Master Warning: Comes on | SAE Code: U1170 |
| U117087 |
Lost Communication With Brake System Control Module(ch2) Missing Message |
A CAN communication error between the skid control ECU assembly and motor generator control ECU (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system |
Comes on | Master Warning: Comes on | SAE Code: U1170 |
MONITOR DESCRIPTION
If the motor generator control ECU detect problem with CAN communication with each ECU, it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs | U0100 (INF U010087): Lost Communication With ECM/PCM U0293 (INF U029387): Lost Communication With Hybrid Control Module U1170 (INF U117087): Lost Communication With Brake System Control Module |
|
Required sensors/components | Motor generator control ECU |
|
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
|
Motor generator control ECU | DTC U0100 (INF U010087) is not detected DTC U0293 (INF U029387) is not detected DTC U1170 (INF U117087) 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
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- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for 2 minutes or more.
- Turn the ignition switch to ON 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 / Motor Generator / 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, perform the normal judgment procedure again.
PROCEDURE
|
1. | CHECK DTC OUTPUT (MOTOR GENERATOR) |
(a) Check for DTCs.
Powertrain > Motor Generator > Trouble Codes|
Result | Proceed to |
|---|---|
|
None of the following DTCs are output. |
A |
| Any of the following DTCs are also output. |
B |
|
Relevant DTC | |
|---|---|
| P312487 |
Lost Communication between Drive Motor "A" and HV/EV ECU Missing Message |
HINT:
U010087, U029387, U117008 or U117087 may be stored due to a malfunction which also causes the DTCs in the preceding table to be stored. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
(b) Turn the ignition switch off.
| A | .gif) | GO TO CAN COMMUNICATION SYSTEM |
| B | | GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM) |
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DESCRIPTION The motor generator control ECU, which is built into the inverter with converter assembly, controls the motor (MG2) based on commands from the hybrid vehicle control ECU.
The motor gene
Relay
On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE
1. INSPECT IGCT RELAY (IGCT)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
T
SEE MORE:
Parts Location
PARTS LOCATION ILLUSTRATION
*1 SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)
*2 SLIDING ROOF SWITCH (MAP LIGHT ASSEMBLY)
*3 FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for RH)
*4 FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for LH) ILLUSTRATION
*1
Taillight Relay Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the taillight and license plate light. WIRING DIAGRAM
for LED Type Parking Light
for Bulb Type Parking Light
CAUTION / NOTICE / HINT
NOTICE:
First perform the communication function inspections in How to Proceed with Trou
