Toyota Highlander Service Manual: Location
SYSTEM DIAGRAM
The emission control system is determined by the ECM based on signals from various sensors.
On-vehicle inspection
1. INSPECT AIR-FUEL RATIO COMPENSATION SYSTEM
(a) Measure the voltage between the terminals of the ECM
connectors.
Standard:
NOTICE:
Connect test leads to the connector's backside. The co ...
More about Toyota Highlander:
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
condit ...
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