Toyota Corolla Cross Owners & Service Manuals

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.

  • CAN communication system
  • ECM
  • Electric brake booster (brake booster with master cylinder assembly)

Comes on

Brake Booster

  • SAE Code: U0100
  • Output ECU: Electric brake booster (brake booster with master cylinder assembly)

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.

  • CAN communication system
  • Inverter with converter assembly
  • Electric brake booster (brake booster with master cylinder assembly)

Comes on

Brake Booster

  • SAE Code: U0110
  • Output ECU: Electric brake booster (brake booster with master cylinder assembly)

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.

  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Electric brake booster (brake booster with master cylinder assembly)

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.

  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Electric brake booster (brake booster with master cylinder assembly)

Comes on

Brake Booster

  • SAE Code: U025E (Case 1 and 2)
  • Output ECU: Electric brake booster (brake booster with master cylinder assembly)

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.

  • Electric brake booster (brake booster with master cylinder assembly)
  • Hybrid vehicle control ECU

Comes on

Brake Booster

  • SAE Code: U0300
  • Output ECU: Electric brake booster (brake booster with master cylinder assembly)

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.

  • Electric brake booster (brake booster with master cylinder assembly)
  • Certification ECU (smart key ECU assembly)

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.

  • CAN communication system
  • Certification ECU (smart key ECU assembly)
  • Electric brake booster (brake booster with master cylinder assembly)

Comes on

Brake Booster

  • SAE Code: U1107
  • Output ECU: Electric brake booster (brake booster with master cylinder assembly)

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.

  • CAN communication system
  • ECM
  • Electric brake booster (brake booster with master cylinder assembly)

Comes on

Brake Booster

  • SAE Code: U111A
  • Output ECU: Electric brake booster (brake booster with master cylinder assembly)

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.

  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Electric brake booster (brake booster with master cylinder assembly)

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.

  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Electric brake booster (brake booster with master cylinder assembly)

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.
U0110:
  • 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.
U025E (Case 1 and 2):
  • 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.
U0300:
  • 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.
U1107:
  • 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.
U111A:
  • 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.
  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off.
  5. Turn the ignition switch to ON (READY) and turn the GTS on.
  6. 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.

  7. Enter the following menus: Chassis / Brake Booster / Utility / All Readiness.
  8. 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.

NEXT

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

GO TO DIAGNOSTIC TROUBLE CODE CHART (RELATED SYSTEM)

B

INSPECT CAN COMMUNICATION SYSTEM

C

USE SIMULATION METHOD TO CHECK

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