Toyota Sienna Service Manual: Air-fuel ratio (a/f) and heated oxygen (ho2) sensor heater monitors (front a/f and rear ho2 sensor type)
(a) Preconditions
The monitor will not run unless:
- The MIL is OFF.
(b) Drive Pattern
(1) Connect an intelligent tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Clear the DTCs.
(4) Start the engine.
(5) Allow the engine to idle for 10 minutes or more.
(6) Drive the vehicle at 25 mph (40 km/h) or more for at least 2 minutes.
(c) Monitor Status
(1) Check the Readiness Monitor status displayed on the tester or scan tool.
If the status does not switch to COMPL (complete), make sure that the preconditions have been met, and repeat the Drive Pattern.
A/F sensor and ho2s monitors
(a) Preconditions
The monitor will not run unless:
2 minutes or more have elapsed since the engine
was started.
The Engine Coolant Temperature (ECT) is 75°C
(167°F) or more.
Cumulative ...
Problem symptoms table
HINT:
When a malfunction is not confirmed by a DTC (Diagnostic
Trouble Code) check and the cause of problem cannot be
identified through a basic inspection, troubleshoot according
to the priority ...
Other materials:
Removal
1. REMOVE ROOF DRIP SIDE FINISH MOULDING
Put protective tape around the roof drip side finish
moulding.
Using a remover for the roof moulding, disengage of
the clips both in the front and rear ends of the roof
drip side finish moulding and then remove the roof
drip side finish moul ...
DTC check / clear
1. DTC CHECK
HINT:
When DTC B1150/23 is detected as a result of
troubleshooting for "Airbag System", perform
troubleshooting for the Occupant Classification System.
Check the DTCs.
Connect the intelligent tester to the DLC3.
Turn the ignition switch to t ...
Clearance warning ECU
COMPONENTS
REMOVAL
1. REMOVE FRONT DOOR SCUFF PLATE LH
2. REMOVE COWL SIDE TRIM BOARD LH
3. REMOVE INSTRUMENT PANEL FINISH PANEL SUBASSEMBLY LOWER LH
4. REMOVE NO. 1 INSTRUMENT PANEL SAFETY PAD INSERT SUB-ASSEMBLY
5. REMOVE CLEARANCE WARNING ECU
Disconnect each connector.
&nb ...
