DTC U0233: Lost Communication with Blind Spot Monitor Master Module [09/2014 - 10/2015]: Procedure

1. *1: w/o Dynamic Rear Steering System
2. *2: w/ Dynamic Rear Steering System

1. Reconfirm DTCs.

   HINT: 

   If DTC U1002 is output from Gateway of the network gateway ECU, this indicates a sub bus 2*1 or sub bus 18*2 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 2*1 or sub bus 18*2.

   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 (Network Gateway ECU) [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 blind spot monitor sensor RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   T39-2 (CA1P) - T39-7 (CA1N)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Blind Spot Monitor Sensor RH)

Result: 

NG 

REPAIR OR REPLACE BLIND SPOT MONITOR SENSOR RH CAN BRANCH WIRE OR CONNECTOR (CA1P, CA1N) 

Result: 

OK 

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   T39-5 (BRB) - Body ground	Engine switch on (IG)	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   T39-10 (BRGD) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Blind Spot Monitor Sensor RH)

Result: 

OK 

REPLACE BLIND SPOT MONITOR SENSOR RH 

(Refer to REMOVAL [09/2014 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR