Toyota Sienna Service Manual: Readiness monitor drive pattern
- Purpose of readiness tests
- Catalyst monitor (active air-fuel ratio control type)
- Evap monitor (key-off type)
- A/F sensor and ho2s monitors
- Air-fuel ratio (a/f) and heated oxygen (ho2) sensor heater monitors (front a/f and rear ho2 sensor type)
Monitor result information
If you use a generic scan tool, multiply the test value by
the scaling value listed below.
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Purpose of readiness tests
The On-Board Diagnostic (OBD II) system is
designed to monitor the performance of emissionrelated
components, and indicate any detected
abnormalities with DTCs (Diagnostic Trouble Codes).
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Other materials:
Camshaft Position "B" Actuator Circuit
DESCRIPTION
The Variable Valve Timing (VVT) system includes the ECM, OCV and VVT
controller. The ECM sends a
target duty-cycle control signal to the OCV. This control signal regulates the
oil pressure supplied to the
VVT controller. Camshaft timing control is performed according to engine ...
Parking Brake Switch Circuit
DESCRIPTION
The Multiplex network body ECU receives parking brake switch signal.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
Connect the intelligent tester to DLC3.
Turn the ignition switch ON and push the intelligent
tester main switch ON.
Se ...
Diagnostic trouble code chart
HINT:
If a trouble code is displayed during the DTC check,
inspect the circuit listed for that code. For details of the
code, refer to the "See page" in the DTC chart.
Inspect the fuse and relay before investigating the
suspected areas shown in the table below.
W ...
