DTC U0130: Lost Communication with Steering Effort Control Module [09/2014 - 10/2015]: Procedure

1. Reconfirm DTCs.

   HINT: 

   If DTC U1002 is output from Gateway of the network gateway ECU, this indicates a sub bus 19 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 19.

   RESULT
   
   

   Result	Proceed to
   DTC U1002 is not output from network gateway ECU.	A
   DTC U1002 is output from network gateway ECU.	B

Result: 

B 

GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC 

(Refer to DTC U1002: Lost Communication with Gateway Module [09/2014 - 10/2015] )

Result: 

A 

See step  2

1. Disconnect the cable from the negative (-) battery terminal.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   SUB BUS 19
   
   

   Tester Connection	Condition	Specified Condition
   N104-2 (CNH2) - N104-8 (CNL2)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   LOCAL BUS
   
   

   Tester Connection	Condition	Specified Condition
   N104-10 (CAN+) - N104-11 (CAN-)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   TEXT IN ILLUSTRATION
   
   

   *A	Sub Bus 19
   *B	Local Bus
   *a	Front view of wire harness connector (to Front Steering Control ECU)

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (Sub Bus 19)	B
   NG (Local Bus)	C

Result: 

B 

REPAIR OR REPLACE FRONT STEERING CONTROL ECU CAN BRANCH WIRE OR CONNECTOR (CNH2, CNL2) 

Result: 

C 

REPAIR OR REPLACE FRONT STEERING CONTROL ECU CAN MAIN WIRE OR CONNECTOR (CAN+, CAN-) 

Result: 

A 

See step  3

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NOTE:

   When connecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [09/2014 - 10/2015] ).

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A31-2 (PIG) - Body ground	Always	11 to 14 V
   N104-7 (+BI) - Body ground	Always	11 to 14 V
   N104-4 (IG) - Body ground	Engine 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
   A31-1 (PGND) - Body ground	Always	Below 1 Ω
   N104-13 (PGD2) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

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

Result: 

OK 

REPLACE FRONT STEERING CONTROL ECU 

(Refer to REMOVAL [09/2014 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR