Toyota Corolla Cross: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the windshield deicer system.
- *: Use the GTS.
PROCEDURE
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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 auxiliary battery voltage.
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 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 LIN COMMUNICATION SYSTEM* |
(a) Using the GTS, check for LIN communication system DTCs.
Click here
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Result | Proceed to |
|---|---|
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LIN DTCs are not output |
A |
| LIN DTCs are output |
B |
| B |
.gif) | GO TO LIN COMMUNICATION SYSTEM
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| 5. |
PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
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Result | Proceed to |
|---|---|
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Fault is not listed in Problem Symptoms Table. |
A |
| Fault is listed in Problem Symptoms Table. |
B |
| B |
| GO TO STEP 7 |
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| 6. |
OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Operation Check
Click here
(b) Terminals of ECU
Click here
(c) Data List / Active Test
Click here
(d) On-vehicle Inspection
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| 7. |
REPAIR OR REPLACE |
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| 8. |
CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
Operation Check
OPERATION CHECK CHECK WINDSHIELD DEICER SYSTEM
(a) Turn the ignition switch to ON. (b) Check that the windshield deicer wire (windshield glass) becomes warm by operating the front wiper deicer switch
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: If the auxiliary battery voltage becomes low, auxiliary battery load control will operate in order to ensure sufficient power is supplied to the power steering system. I
Terminals Of Ecu
TERMINALS OF ECU CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
(a) Disconnect the I49 air conditioning amplifier assembly connector.
(b) Measure the voltage and resistance according to the value(s) in
SEE MORE:
Precaution
PRECAUTION
PRECAUTION WHEN REPLACING CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)
(a) When the central gateway ECU (network gateway ECU) is replaced, update the
ECU security key.
Click here
PRECAUTIONS FOR DISCONNECTING CABLE FROM NEGATIVE (-) BATTERY TERMINAL
NOTICE:
After the ignition sw
IG Circuit Short to Ground (B227111)
DESCRIPTION This DTC is stored when a malfunction in the IG circuit or IG hold circuit of the certification ECU (smart key ECU assembly) is detected.
DTC No. Detection Item
DTC Detection Condition Trouble Area
Note B227111
IG Circuit Short to Ground
When either of
