Toyota Corolla Cross: Lost Communication with ECM/PCM "A" Missing Message (U010087,...,U117087)
DESCRIPTION
The electric brake booster (brake booster with master cylinder assembly) communicates with the following ECUs and sensors via CAN communication.
- ECM
- Hybrid vehicle control ECU
- Inverter with converter assembly
- Certification ECU (smart key ECU assembly)
- Skid control ECU (brake actuator assembly)
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
DTC Output from |
Note |
|---|---|---|---|---|---|---|
|
U010087 |
Lost Communication with ECM/PCM "A" Missing Message |
When the +BS terminal voltage is between 9.6 and 16.5 V, data from the ECM cannot be received for 2 seconds or more. |
|
Comes on |
Brake Booster |
|
|
U011087 |
Lost Communication with Drive Motor Control Module "A" Missing Message |
When the IG terminal voltage is 10 V or more, data from the inverter with converter assembly cannot be received for 2 seconds or more. |
|
Comes on |
Brake Booster |
|
|
U012987 |
Lost Communication with Brake System Control Module "A" Missing Message |
When the IG terminal voltage is 9.5 V or more, communication between the electric brake booster (brake booster with master cylinder assembly) and the skid control ECU (brake actuator assembly) is abnormal for 2 seconds or more. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
U025E87 |
Lost Communication with Electronic Brake Booster Control Module "A" Missing Message |
When the IG terminal voltage is 10 V or more, communication between the electric brake booster (brake booster with master cylinder assembly) and the skid control ECU (brake actuator assembly) is abnormal for 2 seconds or more. |
|
Comes on |
Brake Booster |
|
|
U030057 |
Internal Control Module Software Incompatibility Invalid/Incompatible Software Component |
When the vehicle information stored in both the hybrid vehicle control ECU and the electric brake booster (brake booster with master cylinder assembly) does not match. |
|
Comes on |
Brake Booster |
|
|
U110757 |
Power Management Module Invalid/Incompatible Software Component |
When the vehicle information stored in both the certification ECU (smart key ECU assembly) and the electric brake booster (brake booster with master cylinder assembly) does not match. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
U110787 |
Lost Communication with Power Management Module Missing Message |
When the IG terminal voltage is 10 V or more, data from the certification ECU (smart key ECU assembly) cannot be received for 3 seconds or more. |
|
Comes on |
Brake Booster |
|
|
U111A87 |
Lost Communication with ECM/PCM "A" (ch2) Missing Message |
When the +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, data from the ECM cannot be received for 2 seconds or more. |
|
Comes on |
Brake Booster |
|
|
U115887 |
Lost Communication with Electronic Brake Booster Control Module "A" (ch2) Missing Message |
When the IG terminal voltage is 10 V or more, electric brake booster (brake booster with master cylinder assembly) and skid control ECU (brake actuator assembly) communication malfunction occurs for 2 seconds or more. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
U117087 |
Lost Communication with Brake System Control Module (ch2) Missing Message |
When the IG terminal voltage is 9.5 V or more, communication between the electric brake booster (brake booster with master cylinder assembly) and the skid control ECU (brake actuator assembly) is abnormal for 2 seconds or more. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
MONITOR DESCRIPTION
U0100:- When 3 seconds or more have elapsed after the ignition switch is turned to ON, the power supply voltage of the electric brake booster (brake booster with master cylinder assembly) is a certain value or more, and data is not able to be received from the hybrid vehicle control ECU for a certain amount of time, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.
- When 3 seconds or more have elapsed after the ignition switch is turned to ON, the power supply voltage of the electric brake booster (brake booster with master cylinder assembly) is a certain value or more, and data is not able to be received from the inverter with converter assembly for a certain amount of time, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.
- When 3 seconds or more have elapsed after the ignition switch is turned to ON, the power supply voltage of the electric brake booster (brake booster with master cylinder assembly) is a certain value or more, and data communication between the electric brake booster (brake booster with master cylinder assembly) and skid control ECU (brake actuator assembly) is not possible for a certain amount of time, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.
- When CAN communication with the hybrid vehicle control ECU is normal and the vehicle information stored in both the hybrid vehicle control ECU and skid control ECU does not match, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and a DTC is stored.
- When 3 seconds or more have elapsed after the ignition switch is turned to ON, the power supply voltage of the electric brake booster (brake booster with master cylinder assembly) is a certain value or more, and data communication from the certification ECU (smart key ECU assembly) is not possible for a certain amount of time, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.
- When 3 seconds or more have elapsed after the ignition switch is turned to ON, the power supply voltage of the electric brake booster (brake booster with master cylinder assembly) is a certain value or more, and data is not able to be received from the ECM for a certain amount of time, the electric brake booster (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.
MONITOR STRATEGY
|
Related DTCs |
U0100: CAN communication failure for C1 (hybrid vehicle control ECU) U0110: CAN communication failure for PL (inverter with converter assembly) U025E (Case 1): CAN communication failure for C1 (brake booster with master cylinder assembly to brake actuator assembly) U025E (Case 2): CAN communication failure for C1 (brake booster with master cylinder assembly to brake actuator assembly) U0300: ENG variant information certification error U1107: CAN communication failure for C1 (smart key ECU assembly) U111A: CAN communication failure for PL HEV OBD |
|
Required Sensors/Components(Main) |
Electric brake booster (brake booster with master cylinder assembly) |
|
Required Sensors/Components(Related) |
Electric brake booster (brake booster with master cylinder assembly) |
|
Frequency of Operation |
Continuous |
|
Duration |
-: U0300 2 seconds: U0100, U0110, U025E (Case 1) and U111A 3 seconds: U1107 5 seconds: U025E (Case 2) |
|
MIL Operation |
Immediately: U025E (Case 1 and 2) 2 driving cycles: U0100, U0110, U0300, U1107 and U111A |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs 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
|
TMC's intellectual property |
- |
CONFIRMATION DRIVING PATTERN
NOTICE:
When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.
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.
- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off.
- Turn the ignition switch to ON (READY) and turn the GTS on.
- Wait for 5 seconds or more. [*]
HINT:
[*]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Chassis / Brake Booster / 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 driving pattern again.
PROCEDURE
|
1. |
CLEAR DTC |
(a) Clear the DTCs.
Chassis > Brake Booster > Clear DTCs(b) Turn the ignition switch off.
|
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|
2. |
CHECK DTC OUTPUT (HEALTH CHECK) |
(a) Using the GTS to operate the Health Check.
(b) Check for DTCs.
|
Result |
Proceed to |
|---|---|
|
DTCs for related systems are output together with U010087, U011087, U012987, U025E87, U030057, U110757, U110787, U111A87, U115887 or U117087. |
A |
|
DTC U010087, U011087, U012987, U025E87, U030057, U110757, U110787, U111A87, U115887 or U117087 is output. |
B |
|
DTCs are not output. |
C |
| A | .gif)
|
GO TO DIAGNOSTIC TROUBLE CODE CHART (RELATED SYSTEM) |
| B |
|
INSPECT CAN COMMUNICATION SYSTEM |
| C |
|
USE SIMULATION METHOD TO CHECK |
READ NEXT:
Lost Communication with TCM Missing Message (U010187,...,U130957)
DESCRIPTION
The skid control ECU (brake actuator assembly) communicates
with the following ECUs and sensors via CAN communication.
ECM
Yaw rate and acceleration sensor (airbag ECU assembly)
Brake Hold Standby Indicator Light Circuit
DESCRIPTION
The brake hold standby indicator light turns on if brake hold
control is possible when the following conditions required for operation standby
are met and the brake hold switch (elect
Brake Hold Operated Indicator Light Circuit
DESCRIPTION
The brake hold operated indicator light illuminates when the
brake hold system is operating (vehicle stopped due to brake fluid pressure hold)
and turns off when the brake hold system
SEE MORE:
IG2 Signal Circuit Short to Auxiliary Battery (P253012)
DESCRIPTION The hybrid vehicle control ECU compares the IGP signal to the IG control status signal sent from the certification ECU (smart key ECU assembly) to detect a stuck on malfunction of the IGP signal.
HINT: If DTC P253012 is stored, the ignition switch will turn off (READY off).
DTC
Lost Communication with ECM/PCM "A" Missing Message (U010087,...,U110387)
DESCRIPTION
These DTCs are stored if there is a malfunction in the CAN communication
system connected to the clearance warning ECU assembly.
HINT:
If CAN communication system DTCs are stored, they may also be stored
in other systems.
DTC No.
Detection Item
DT
