DTC U1150-87: Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message [08/2023 - ]: Procedure

Pre-procedure1

• Enter the following menus:

  Powertrain > Hybrid Control > Trouble Codes 

• Check for DTCs.

  Result

  Result	Proceed to
  DTCs are not output	A
  DTCs are output	B

Post-procedure1

• None

Result: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - ] 

Result: 

A 

See step  2

Pre-procedure1

• Turn the ignition switch to ON.

• Measure the voltage according to the value(s) in the table below.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a

  Component with harness connected (Hybrid Vehicle Control ECU)

  -

  -

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  C59-8 (+B1) - Body ground	Ignition switch ON	11 to 14 V	V
  A21-10 (+B2) - Body ground	Ignition switch ON	11 to 14 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Turn the ignition switch off.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (HYBRID VEHICLE CONTROL ECU POWER SOURCE CIRCUIT) 

Result: 

OK 

See step  3

Pre-procedure1

• Check that the service plug grip is not installed.
  NOTE:

  After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.

• Disconnect the H124 electric vehicle charger assembly connector.
  NOTE:

  • Before disconnecting the connector, check that it is not loose or disconnected.
  • Check the terminals of the connector for deformation and corrosion.

• Measure the resistance according to the value(s) in the table below.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Front view of wire harness connector (to Electric Vehicle Charger Assembly)

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  H124-15 (CA4H) - H124-14 (CA4L)	Ignition switch off	54 to 69 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Reconnect the electric vehicle charger assembly connector.

Result: 

OK 

REPLACE ELECTRIC VEHICLE CHARGER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

Result: 

NG 

See step  4

Pre-procedure1

• Check that the service plug grip is not installed.
  NOTE:

  After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.

• Disconnect the C59 hybrid vehicle control ECU connector.
• Disconnect the H124 Electric vehicle charger assembly connector.
• Disconnect the C35 transmission floor shift assembly (shift control ECU) connector.
• Disconnect the B56 shift control actuator assembly (shift actuator ECU) connector.
• Disconnect the o5 battery ECU assembly connector.
• Connect the SST.

  HINT: 

  Refer to Instructions for Connecting SST [08/2023 - ]

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  C59-9 (CA4H) - H124-15 (CA4H)	Ignition switch off	Below 1 Ω	Ω
  C59-22 (CA4L) - H124-14 (CA4L)	Ignition switch off	Below 1 Ω	Ω
  C59-9 (CA4H) and H124-15 (CA4H) - Other terminals and body ground	Ignition switch off	10 kΩ or higher	kΩ
  C59-22 (CA4L) and H124-14 (CA4L) - Other terminals and body ground	Ignition switch off	10 kΩ or higher	kΩ

  NOTE:

  Make sure that each connector between the electric vehicle charger assembly and hybrid vehicle control ECU is not loose or disconnected and its terminals are not deformed or corroded.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Disconnect the SST.
• Reconnect the battery ECU assembly connector.
• Reconnect the shift control actuator assembly (shift actuator ECU) connector.
• Reconnect the transmission floor shift assembly (shift control ECU) connector.
• Reconnect the Electric vehicle charger assembly connector.
• Reconnect the hybrid vehicle control ECU connector.

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR