DTC U0293: EV ECU Communication [06/2015 - 11/2018]: Procedure

Body Electrical > Gateway > Trouble Codes 

1. Reconfirm DTCs.

   HINT: 

   If DTC U1002 is output from Gateway of the network gateway ECU, this indicates a sub bus 2 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 2.

   Result

   Result	Proceed to
   U1002 is not output from network gateway ECU (Techstream display: Gateway)	A
   U1002 is output from network gateway ECU (Techstream display: Gateway)	B

Result: 

B 

GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC. Refer to  DTC U1002: Lost Communication with Gateway Module (Network Gateway ECU) [06/2015 - 11/2018]  

Result: 

A 

See step  2

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the EV control 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 EV Control ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G45-34 (CA2H) - G45-35 (CA2L)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (EV CONTROL ECU) 

Result: 

OK 

See step  3

1. Disconnect the EV control 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 EV Control ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G45-5 (E01) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω
   G45-6 (E1) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω
   G46-4 (E12) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω
   G46-5 (E02) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

3. Reconnect the EV control ECU connector.
4. Reconnect the cable to the negative (-) auxiliary battery terminal.
5. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (EV Control ECU)

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A28-1 (+B2) - Body ground	Power switch on (IG)	11 to 14 V
   A27-4 (+B1) - Body ground	Power switch on (IG)	11 to 14 V
   A28-3 (IG2) - Body ground	Power switch on (IG)	11 to 14 V

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE EV CONTROL ECU. Refer to  REMOVAL [06/2015 - 11/2018] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)