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 ...
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Inspection
1. INSPECT INTAKE AIR CONTROL VALVE ASSY NO.2
(a) Apply 26.7 kPa (200 mmHg, 7.9 in.Hg) of vacuum to the
actuator. Check if the actuator rod pulls the lever and
causes the valve to rotate open, as shown in the illustration.
(b) One minute after applying the vacuum, check that the actuator
ro ...
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