Toyota Camry (XV70): How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

• Before performing troubleshooting for the road sign assist system, make sure that the pre-collision system and lane tracing assist system are not malfunctioning.

  Pre-collision system: Click here

  Lane tracing assist system: Click here

• Perform the following procedure to troubleshoot the road sign assist system.
• *: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

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2.	CUSTOMER PROBLEM ANALYSIS

HINT:

• In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
• Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
• The following 5 items are important points for problem analysis:

  What	Vehicle model, system name
  When	Date, time, occurrence frequency
  Where	Road conditions
  Under what conditions?	Driving conditions, weather conditions
  How did it happen?	Problem symptoms

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3.

PRE-CHECK

(a) Measure the battery voltage.

Standard voltage:

11 to 14 V

HINT:

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

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4.	CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check for CAN communication system DTCs.

Click here

Result	Proceed to
CAN DTCs are not output	A
CAN DTCs are output	B

B

GO TO CAN COMMUNICATION SYSTEM

A

5.	CHECK FOR DTCs*

(a) Using the Techstream, check for DTCs.

Body Electrical > Road Sign Assist > Trouble Codes

(b) If a DTC is output, record the DTC.

Result	Proceed to
DTCs are not output	A
DTCs are output	B

B

GO TO STEP 7

A

6.	CHECK VEHICLE CONTROL HISTORY*

(a) Using the Techstream, check for Vehicle Control History (RoB).

Body Electrical > Road Sign Assist > Utility

Tester Display
Vehicle Control History (RoB)

(b) If the Vehicle Control History (RoB) is output, record it.

Result	Proceed to
Vehicle Control History (RoB) is not output	A
Vehicle Control History (RoB) is output	B

A

GO TO SYMPTOM SIMULATION

B

GO TO STEP 8

7.	RECONFIRM DTC OUTPUT*

(a) Using the Techstream, clear the DTCs.

Body Electrical > Road Sign Assist > Clear DTCs

(b) Reproduce the vehicle conditions that were present when the DTCs that were noted were stored.

HINT:

Refer to each corresponding DTC for details on the detection conditions.

Click here

(c) Using the Techstream, check for DTCs.

Body Electrical > Road Sign Assist > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

A

GO TO STEP 6

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

8.	RECONFIRM VEHICLE CONTROL HISTORY*

(a) Using the Techstream, clear the Vehicle Control History (RoB).

Body Electrical > Road Sign Assist > Utility

Tester Display
Vehicle Control History (RoB)

(b) Using the Techstream, check for Vehicle Control History (RoB).

Body Electrical > Road Sign Assist > Utility

Tester Display
Vehicle Control History (RoB)

Result	Proceed to
Vehicle Control History (RoB) is not output	A
Vehicle Control History (RoB) is output	B

A

GO TO SYMPTOM SIMULATION

B

GO TO VEHICLE CONTROL HISTORY

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