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Home >> Toyota >> 2022 >> Corolla Cross L, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (Can Communication System (HEV) - Circuit Tests (1 Of 5) & Diagnostic Codes) >> CAN COMMUNICATION SYSTEM (for HEV Model) >> DTC U0111-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message; DTC U01BD-87: Lost Communication with DC/DC Converter Control Module "C" Missing Message; DTC U1150-87: Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message; DTC U117B-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" (ch2) Missing Message [11/2022 - ] >> Procedure

DTC U0111-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message; DTC U01BD-87: Lost Communication with DC/DC Converter Control Module "C" Missing Message; DTC U1150-87: Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message; DTC U117B-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" (ch2) Missing Message [11/2022 - ]: Procedure

WARNING: This page is about a different car, the 2025 Toyota Corolla Cross, 2024 Toyota Corolla Cross, and 2023 Toyota Corolla Cross. However, it is still accessible from the selected car via links, so may be relevant.
  1. RECONFIRM DTC OUTPUT 
    1. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Powertrain > HV Battery > Trouble Codes 

      Result

      Result  Proceed to 
      Only DTC U01BD-87 is output A
      DTC U0111-87, P01BD-87, P1150-87 and/or P117B-87 are output B

    Result: 

    B 

    See step  5

    Result: 

    A 

    See step  2

  2. CHECK FOR OPEN IN CAN BUS LINES (HYBRID MOTOR CONTROL INVERTER ASSEMBLY BRANCH LINE) 
    WARNING:

    Be sure to wear insulated gloves.

    1. 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.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.
    3. Disconnect the hybrid motor control inverter assembly connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A188-5 (CNH) - A188-4 (CNL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      GTY1114693Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Motor Control Inverter Assembly)

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Reconnect the cable to the negative (-) auxiliary battery terminal.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A188-3 (IGCT) - Body ground Ignition switch ON Same as auxiliary battery voltage
      GTY1118795Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Motor Control Inverter Assembly)

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

    Result: 

    OK 

    See step  4

  4. CHECK AMD TERMINAL VOLTAGE 
    1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      D1-1 (AMD) - Body ground Ignition switch off Same as auxiliary battery voltage
      GTY1105585Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 AMD Terminal (Hybrid Motor Control Inverter Assembly Side)
      *2 AMD Terminal (No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Side)
      *a D1-1 (AMD)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MG ECU (REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

  5. CHECK FOR OPEN IN CAN MAIN BUS LINES 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1112153Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      I249-9 (CA4H) - I249-22 (CA4L) Cable disconnected from negative (-) auxiliary battery terminal Below 70 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  27

    Result: 

    OK 

    See step  6

  6. CHECK FOR SHORT IN CAN BUS LINES 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1112153Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      I249-9 (CA4H) - I249-22 (CA4L) Cable disconnected from negative (-) auxiliary battery terminal 54 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  21

    Result: 

    OK 

    See step  7

  7. CHECK FOR SHORT TO +B IN CAN BUS LINE 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1118267Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      I249-9 (CA4H) - I249-13 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      I249-22 (CA4L) - I249-13 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  15

    Result: 

    OK 

    See step  8

  8. CHECK FOR SHORT TO GND IN CAN BUS LINE 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1112152Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      I249-9 (CA4H) - A192-24 (E12) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      I249-22 (CA4L) - A192-24 (E12) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    INSPECT FOR INTERMITTENT PROBLEMS 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2021 - ]

    Result: 

    NG 

    See step  9

  9. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU) 
    1. Disconnect the No. 3 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1117981Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Vehicle Control ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-2 (CANH) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      A195-13 (CANL) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  10

  10. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1110784Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Motor Control Inverter Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-3 (CANH) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      A195-14 (CANL) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  13

    Result: 

    OK 

    See step  11

  11. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - BATTERY ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1110782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Battery ECU Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-4 (CANH) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      A195-15 (CANL) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 3 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  14

  12. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU) 
    1. Disconnect the I249 hybrid vehicle control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1117981Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Vehicle Control ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-2 (CANH) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      A195-13 (CANL) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU 

    Refer to REMOVAL [11/2022 - 12/2024] , or refer to REMOVAL [12/2024 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU) 

  13. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    1. 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.

    2. Disconnect the A188 hybrid motor control inverter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY1110784Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Motor Control Inverter Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-3 (CANH) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      A195-14 (CANL) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MG ECU (REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 

  14. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - BATTERY ECU ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    1. 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.

    2. Disconnect the O211 battery ECU assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY1110782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Battery ECU Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-4 (CANH) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      A195-15 (CANL) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BATTERY ECU ASSEMBLY 

    Refer to REMOVAL [11/2022 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - BATTERY ECU ASSEMBLY) 

  15. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU) 
    1. Disconnect the No. 3 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1110783Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Vehicle Control ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-2 (CANH) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      A195-13 (CANL) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  18

    Result: 

    OK 

    See step  16

  16. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1110785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Motor Control Inverter Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-3 (CANH) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      A195-14 (CANL) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  19

    Result: 

    OK 

    See step  17

  17. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - BATTERY ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1110786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Battery ECU Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-4 (CANH) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      A195-15 (CANL) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 3 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  20

  18. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU) 
    1. Disconnect the I249 hybrid vehicle control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1110783Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Vehicle Control ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-2 (CANH) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      A195-13 (CANL) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU 

    Refer to REMOVAL [11/2022 - 12/2024] , or refer to REMOVAL [12/2024 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU) 

  19. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    1. 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.

    2. Disconnect the A188 hybrid motor control inverter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY1110785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Motor Control Inverter Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-3 (CANH) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      A195-14 (CANL) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MG ECU (REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 

  20. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - BATTERY ECU ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    1. 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.

    2. Disconnect the O211 battery ECU assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY1110786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Battery ECU Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-4 (CANH) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      A195-15 (CANL) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BATTERY ECU ASSEMBLY 

    Refer to REMOVAL [11/2022 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - BATTERY ECU ASSEMBLY) 

  21. CHECK FOR SHORT IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU) 
    1. Disconnect the No. 3 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1110003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Vehicle Control ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-2 (CANH) - A195-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  24

    Result: 

    OK 

    See step  22

  22. CHECK FOR SHORT IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1117821Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Motor Control Inverter Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-3 (CANH) - A195-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  25

    Result: 

    OK 

    See step  23

  23. CHECK FOR SHORT IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR - BATTERY ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1110004Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Battery ECU Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-4 (CANH) - A195-15 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 3 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  26

  24. CHECK FOR SHORT IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU) 
    1. Disconnect the I249 hybrid vehicle control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1110003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Vehicle Control ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-2 (CANH) - A195-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU 

    Refer to REMOVAL [11/2022 - 12/2024] , or refer to REMOVAL [12/2024 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU) 

  25. CHECK FOR SHORT IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    1. 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.

    2. Disconnect the A188 hybrid motor control inverter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY1117821Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Motor Control Inverter Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-3 (CANH) - A195-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MG ECU (REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - HYBRID MOTOR CONTROL INVERTER ASSEMBLY) 

  26. CHECK FOR SHORT IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR - BATTERY ECU ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    1. 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.

    2. Disconnect the O211 battery ECU assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY1110004Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Battery ECU Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-4 (CANH) - A195-15 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BATTERY ECU ASSEMBLY 

    Refer to REMOVAL [11/2022 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - BATTERY ECU ASSEMBLY) 

  27. CHECK FOR OPEN IN CAN MAIN BUS LINES (HYBRID VEHICLE CONTROL ECU) 
    1. Disconnect the hybrid vehicle control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1115643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      I249-9 (CA4H) - I249-22 (CA4L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU 

    Refer to REMOVAL [11/2022 - 12/2024] , or refer to REMOVAL [12/2024 - ]

    Result: 

    NG 

    See step  28

  28. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU) 
    1. Reconnect the I249 hybrid vehicle control ECU connector.
    2. Disconnect the No. 3 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY1110003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Hybrid Vehicle Control ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-2 (CANH) - A195-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU) 

    Result: 

    OK 

    See step  29

  29. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR - BATTERY ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1110004Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Battery ECU Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A195-4 (CANH) - A195-15 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 3 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  30

  30. CHECK FOR OPEN IN CAN MAIN BUS LINES (BATTERY ECU ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    1. 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.

    2. Reconnect the A195 No. 3 CAN junction connector.
    3. Disconnect the battery ECU assembly connector.
    4. Measure the resistance according to the value(s) in the table below.
      GTY1112591Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Battery ECU Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      O211-22 (CA1H) - O211-21 (CA1L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BATTERY ECU ASSEMBLY 

    Refer to REMOVAL [11/2022 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (BATTERY ECU ASSEMBLY - NO. 3 CAN JUNCTION CONNECTOR) 

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