Toyota Highlander Service Manual: 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.

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 ...
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 ...
More about Toyota Highlander:
On-vehicle inspection
1. CHECK THROTTLE BODY
(a) Listen to the throttle control motor operating sounds.
Turn the ignition switch ON.
When pressing the accelerator pedal position sensor lever, listen
to the running motor. Make sure
no friction noise comes from the motor.
If friction noise exists ...
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