Toyota Highlander Service Manual: Customer problem analysis
Toyota Highlander Service Manual / Introduction / How to troubleshoot ecu controlled systems / How to proceed with troubleshooting / Customer problem analysis
HINT:
- In troubleshooting, the problem symptoms must be confirmed accurately. Preconceptions should be discarded in order to give an accurate judgement. 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 it occurred.
- As much information as possible should be gathered for reference. Past problems that seem unrelated may also help in some cases. In the Diagnostic section, a customer problem analysis table is provided for each system.
- 5 items are important points in the problem analysis:
(Sample) Supplemental Restraint System check sheet.
How to proceed with troubleshooting
HINT:
Carry out troubleshooting in accordance with the procedures below. Only a basic
procedure is shown. Details
in the Diagnostic Section show the most effective methods for each circuit.
Conf ...
Symptom confirmation and diagnostic trouble code
HINT:
The diagnostic system in the HIGHLANDER has various functions.
The first function is the Diagnostic Trouble Code (DTC) check. A DTC
is a code stored in the ECU
memory whenever a malfun ...
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