DTC U0130: Lost Communication with Steering Effort Control Module [09/2015 - ]: Procedure

Result:  NEXT

NEXT 

See step  2

1. Disconnect the cable from the negative (-) auxiliary battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.
   WARNING:

   Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

   NOTE:

   When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [09/2015 - ] ).

Result:  NEXT

NEXT 

See step  3

1. Disconnect the steering control ECU connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   STEERING BUS
   
   

   Tester Connection	Switch Condition	Specified Condition
   A41-9 (CANH) - A41-20 (CANL)	Power switch off	54 to 69 Ω

   BRAKING AND DRIVING BUS
   
   

   Tester Connection	Switch Condition	Specified Condition
   A42-4 (CAN+) - A42-9 (CAN-)	Power switch off	54 to 69 Ω

   TEXT IN ILLUSTRATION
   
   

   *A	Steering Bus
   *B	Braking and Driving Bus
   *a	Front view of wire harness connector (to Steering Control ECU)

Result:  NG

NG 

REPAIR OR REPLACE STEERING CONTROL ECU CAN BRANCH WIRE OR CONNECTOR (CANH, CANL, CAN+, CAN-) 

Result:  OK

OK 

See step  4

1. Connect the cable to the negative (-) auxiliary battery terminal.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NOTE:

   When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [09/2015 - ] ).

2. Disconnect the steering control ECU connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A42-10 (+BI) - Body ground	Always	11 to 14 V
   A42-8 (PIG) - Body ground	Always	11 to 14 V
   A42-3 (IG) - Body ground	Power switch on (IG)	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A42-7 (PGND) - Body ground	Always	Below 1 Ω
   A43-8 (PGD2) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Steering Control ECU)

Result:  OK

OK 

REPLACE STEERING CONTROL ECU 

(Refer to REMOVAL [09/2015 - ] )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR