DTC U023A-87: Lost Communication with Image Processing Module "A" [11/2021 - 03/2022]: Procedure

1. Check the DTCs and output pattern according to the following table.

   Body Electrical > Headlight Control > Trouble Codes 

   Chassis > Front Recognition Camera > Trouble Codes 

   Pattern	DTC output part name (Display on GTS)
   	Headlight Control	Front Recognition Camera
   Pattern 1	U023A-87	U0232-87	U0241-87	U1236-87*
   Pattern 2	U023A-87	-	U0241-87	-

   1. *: w/ Front Cross Traffic Alert

   Result

   Result	Proceed to
   Output in pattern 1	A
   Output in pattern 2	B

Result: 

A 

GO TO FRONT CAMERA SYSTEM. Refer to  DTC U0232-87: Lost Communication with Side Obstacle Detection Control Module "A" Missing Message; DTC U0241-87: Lost Communication with Headlamp Control Module "A" Missing Message; DTC U1236-87: Lost Communication with Cruise Control Front Distance Range Sensor Front Side "B" Missing Message [11/2021 - 03/2022] 

Result: 

B 

See step  2

Pre-procedure1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the M17 forward recognition camera connector.
2. Disconnect the cable from the negative (-) auxiliary battery terminal.

   Procedure1

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M17-4 (CA3H) - M17-3 (CA3L)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. None

Result: 

OK 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [11/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR