FC Control ECU Communication Stop Mode [11/2020 - 12/2022]: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the B1 FC control ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B1-65 (CA1H) - B1-64 (CA1L)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR 

Result: 

OK 

See step  2

1. Disconnect the A48 FC control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A48-53 (EC) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω
   A48-21 (E03) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω
   B1-104 (E1) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω
   B1-105 (E2) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

3. Reconnect the cable to the negative (-) auxiliary battery terminal.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A48-2 (BP3) - Body ground	Ignition switch ON	11 to 14 V
   B1-43 (+B1) - Body ground	Ignition switch ON	11 to 14 V
   B1-83 (+B2) - Body ground	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FC CONTROL ECU. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR