POWER DOOR LOCK CONTROL SYSTEM - HOW TO PROCEED WITH TROUBLESHOOTING
Use the following procedures to troubleshoot the power door lock control system.
The intelligent tester should be used in steps 4, 5, and 7.
| 1.VEHICLE BROUGHT TO WORKSHOP |
| 2.CUSTOMER PROBLEM ANALYSIS CHECK |
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 in the problem analysis:
| What | Vehicle model, system name |
| When | Date, time, occurrence frequency |
| Where | Road conditions |
| Under what conditions? | Running conditions, driving conditions, weather conditions |
| How did it happen? | Problem symptoms |
| 3.INSPECT 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.
| 4.INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN) |
Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally .
- Result:
| Result | Proceed to |
| MPX DTC is not output | A |
| MPX DTC is output | B |
| | Go to MULTIPLEX COMMUNICATION SYSTEM |
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Check for DTCs and note any codes that are output .
Recheck for DTCs.
- Result:
| Result | Proceed to |
| DTC does not reoccur | A |
| DTC reoccurs | B |
| | Go to DIAGNOSTIC TROUBLE CODE CHART |
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- Result:
| Result | Proceed to |
| Fault is not listed in problem symptoms table | A |
| Fault is listed in problem symptoms table | B |
| | After repair, go to step 9 |
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| 7.OVERALL ANALYSIS AND TROUBLESHOOTING |
LEXUS IS250, IS220d / GSE20 ALE20