Toyota Camry (XV70): How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the key reminder warning system.
- *: Use the Techstream.
PROCEDURE
|
1. | VEHICLE BROUGHT TO WORKSHOP |
|
| 2. |
CUSTOMER PROBLEM ANALYSIS CHECK |
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, whether the problem occurred recently or has been occurring for a long time
Where
Whether the problem occurs at a specific location
Under what conditions?
Whether the doors were locked or unlocked, whether the ignition switch was ON, whether the engine has started
How did it happen?
Problem symptoms
|
| 3. |
PRE-CHECK |
(a) Measure the battery voltage.
Standard Voltage:
11 to 14 V
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.
|
| 4. |
CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check for CAN communication system DTCs.
Click here
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Result | Proceed to |
|---|---|
|
CAN DTCs are not output |
A |
| CAN DTCs are output |
B |
| B |
 | GO TO CAN COMMUNICATION SYSTEM |
|
| 5. |
PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
|
Result | Proceed to |
|---|---|
|
Fault is not listed in Problem Symptoms Table |
A |
| Fault is listed in Problem Symptoms Table |
B |
| B |
| GO TO STEP 7 |
|
| 6. |
OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
(c) Operation Check
Click here
(d) Inspection
Click here
|
| 7. |
REPAIR OR REPLACE |
|
| 8. |
CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
Operation Check
OPERATION CHECK CHECK FUNCTION (a) Check that the key reminder warning buzzer sounds.
(1) With the driver door closed, insert the key into the ignition key cylinder and then make sure that the igniti
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of
Terminals Of Ecu
TERMINALS OF ECU CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel jun
SEE MORE:
Lost Communication with Power Source Control (B278C)
DESCRIPTION This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and power management control ECU stops for 10 seconds or more.
DTC No. Detection Item
DTC Detection Condition Trouble Area
B278C Lost Communication with Power Source
Summary of functions
The multi-information display presents the driver with a variety of driving-
related data, such as the current outside temperature. The multi-information
display can also be used to change the display settings
and other settings.
Indicators
Driving assist system status display area
Disp
