DTC U0230: Lost Communication with Rear Gate Module [12/2013 - ]: Procedure

Body Electrical > Main Body > Trouble Codes 

1. Reconfirm DTCs.

   HINT: 

   If DTC U1002 is output from Main Body of the main body ECU (multiplex network body ECU), this indicates a sub bus 1 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 1.

   Result

   Result	Proceed to
   DTC U1002 is not output from main body ECU (multiplex network body ECU) (Techstream display: Main Body)	A
   DTC U1002 is output from main body ECU (multiplex network body ECU) (Techstream display: Main Body)	B

Result: 

B 

Refer to  DTC U1002: Lost Communication with Gateway Module (Main Body ECU) [12/2013 - 11/2016]   or  DTC U1002: Lost Communication with Gateway Module (Main Body ECU) [11/2016 - ]  

Result: 

A 

See step  2

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the X6 multiplex network door ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Multiplex Network Door ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   X6-13 (CANP) - X6-14 (CANN)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result: 

NG 

REPAIR OR REPLACE CAN MAIN LINE OR CONNECTOR (MULTIPLEX NETWORK DOOR ECU) 

Result: 

OK 

See step  3

1. Disconnect the X7 multiplex network door ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Multiplex Network Door ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   X7-7 (GND) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Multiplex Network Door ECU)

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   X7-8 (B) - Body ground	Always	11 to 14 V
   X6-7 (IG) - Body ground	Ignition switch ON	11 to 14 V

Result: 

OK 

REPLACE MULTIPLEX NETWORK DOOR ECU. Refer to  REMOVAL [12/2013 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)