Driver Seat Control ECU Communication Stop Mode [10/2022 - 11/2023]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the e25 position control ECU assembly LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   e25-13 (CANP) - e25-14 (CANN)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Position Control ECU Assembly LH)

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (POSITION CONTROL ECU ASSEMBLY LH) 

Result: 

OK 

See step  2

1. Disconnect the e23 position control ECU assembly LH connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   e23-2 (GND) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Position Control ECU Assembly LH)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   e23-3 (+B) - Body ground	Always	11 to 14 V
   e25-1 (IG) - Body ground	Ignition switch ON	11 to 14 V
   e25-15 (SYSB) - Body ground	Always	11 to 14 V

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU ASSEMBLY LH 

Refer to REMOVAL [10/2022 - 11/2023]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)