Power Steering ECU Communication Stop Mode [12/2022 - ]: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the K44 power steering ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K44-7 (CANH) - K44-8 (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 (POWER STEERING ECU ASSEMBLY) 

Result: 

OK 

See step  2

1. Disconnect the K71 power steering ECU assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K71-2 (PGND) - 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	Condition	Specified Condition
   K44-1 (IG) - Body ground	Ignition switch ON	8 to 16 V
   K71-1 (PIG) - Body ground	Ignition switch off	9 to 16 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POWER STEERING ECU ASSEMBLY 

Refer to REMOVAL [12/2022 - 03/2023] , or refer to REMOVAL [03/2023 - ]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)