1. Disconnect cable from negative battery terminal
2. REMOVE HEATED OXYGEN SENSOR (for Bank 1 Sensor 2) (See page EC-32)
3. REMOVE TAIL EXHAUST PIPE ASSEMBLY
(a) Remove the 2 bolts.
(b) Disconnect the 3 exhaust pipe supports and remove the tail exhaust pipe assembly.

(c) Remove the gasket from the center exhaust pipe assembly.
4. REMOVE CENTER EXHAUST PIPE ASSEMBLY
(a) Remove the 2 bolts and 2 compression springs.
(b) Disconnect the 2 exhaust pipe supports and remove the center exhaust pipe assembly

(c) Remove the gasket from the front exhaust pipe assembly.
5. REMOVE FRONT EXHAUST PIPE ASSEMBLY
(a) Disconnect the heated oxygen sensor (for bank 2 sensor 2) connector.
(b) Remove the 6 nuts and front exhaust pipe assembly.

(c) Remove the 2 gaskets from the front exhaust pipe assembly.
6. REMOVE NO. 1 EXHAUST PIPE SUPPORT BRACKET

(a) Remove the bolt and No. 1 exhaust pipe support bracket.
7. REMOVE HEATED OXYGEN SENSOR (for Bank 2 Sensor 2) (See page EC-33)
Exhaust pipe (for 2wd)
InstallationWhen servicing full-time 4wd vehicles
The full-time 4WD SIENNA is equipped with the open
center differential system.
If incorrect preparations or test procedures are used, the
test will not only be unsuccessful, but may be dangerous
as well.
Therefore, before beginning any such servicing or test,
be sure to check the following ...
Transmission Error
DTC 01-DC Transmission Error
DESCRIPTION
HINT:
*1: This code may be stored if the engine is started, idled for 60 seconds and
then started again.
NOTICE:
Before starting troubleshooting, be sure to clear DTCs to erase
codes stored due to the
reasons described in the HINT ...
Removal
1. Remove rear wheel
2. Remove exhaust pipe assembly
Hint:
(see page ex-8)
3. Remove propeller with center bearing
shaft assembly
Hint:
(see page pr-3)
4. REMOVE REAR DIFFERENTIAL FILLER PLUG
(A) using a hexagon wrench (10 mm), remove the filler
plug and gasket.
5. Remove rear differentia ...