Toyota Corolla Cross: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the LIN communication system.
- *: Use the GTS.
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 |
|
|
3. |
PRE-CHECK |
(a) Measure the auxiliary battery voltage with the ignition switch off.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
(b) Check the fuses and relays.
(c) Check the connectors and terminals to make sure that there are no abnormalities such as a loose connection or deformation.
|
|
4. |
INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Using the GTS, check for CAN communication system DTCs.
- for HEV Model: Click here
.gif)
- for Gasoline Model: Click here
|
Result |
Proceed to |
|---|---|
|
CAN DTCs are not output |
A |
|
CAN DTCs are output(for HEV Model) |
B |
|
CAN DTCs are output(for Gasoline Model) |
C |
| B | .gif) |
GO TO CAN COMMUNICATION SYSTEM |
| C | |
GO TO CAN COMMUNICATION SYSTEM |
|
|
5. |
INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* |
(a) Using the GTS, check for LIN communication system DTCs.
|
Result |
Proceed to |
|---|---|
|
LIN DTCs are not output |
A |
|
LIN DTCs are output |
B |
| B | |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
|
6. |
OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
|
|
7. |
REPAIR OR REPLACE |
|
|
8. |
CONFIRMATION TEST |
| NEXT | |
END |
READ NEXT:
Terminals Of Ecu
TERMINALS OF ECU
CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY
ECU)
*1
Power Distribution Box Assembly
*2
Main Body
Diagnosis System
DIAGNOSIS SYSTEM
DESCRIPTION
The main body ECU (multiplex network body ECU) and certification ECU (smart key
ECU assembly) control the LIN communication system. LIN communication system data
and
Data List / Active Test
DATA LIST / ACTIVE TEST
DATA LIST
NOTICE:
In the table below, the values listed under "Normal Condition" are reference
values. Do not depend solely on these reference values when decidi
SEE MORE:
Engine Oil Temperature Sensor Circuit Short to Battery or Open (P019515)
DESCRIPTION Refer to DTC P019511. Click here
DTC No. Detection Item
DTC Detection Condition Trouble Area
MIL Note
P019515 Engine Oil Temperature Sensor Circuit Short to Battery or Open
The oil pressure and temperature sensor output voltage is higher than 4.8
Lost Communication with TCM Missing Message (U010187,U010087,U012987,U013187,U014087,U015587,U024287,U029387)
DESCRIPTION These DTCs are stored if a CAN communication malfunction occurs between the headlight ECU sub-assembly LH and other ECUs.
DTC No. Detection Item
DTC Detection Condition Trouble Area
U010087 Lost Communication with ECM/PCM "A" Missing Message
The headlight ECU s
