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.
...
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).
...
Other materials:
Air outlet control servo motor (for rear air conditioning system)
ON-VEHICLE INSPECTION
1. INSPECT REAR AIR OUTLET CONTROL SERVO
MOTOR
(a) Inspect servo motor operation.
(1) Connect the positive (+) lead from the battery
to terminal 4 and negative (-) lead to terminal 5,
then check that the arm turns to "FOOT" side
smoothly.
(2) Connect t ...
Disassembly
HINT:
When the battery is reconnected, the back door is locked and
cannot be opened. Therefore, it is necessary to unlock the
back door using the door control switch or transmitter switch.
1. REMOVE BACK DOOR SCUFF PLATE (See page ET-
18)
2. REMOVE QUARTER TRIM PANEL ASSEMBLY
FRONT LH
3. REM ...
Check and replace ecu
NOTICE: • The connector should not be disconnected from
the ECU. Perform the inspection from the
backside of the connector on the wire harness
side.
• When no measuring condition is specified,
perform the inspection with the engine stopped
and the ignition switch on.
• Che ...
