Toyota Sienna Service Manual: Fail-safe chart
1. FAIL-SAFE
This function minimizes the loss of the ECT functions when any malfunction occurs in a sensor or solenoid.
(a) ATF (Automatic Transmission Fluid) temperature sensor: When the ATF temperature sensor has a malfunction, 5th upshift is prohibited.
(b) Counter gear speed sensor NC (Speed sensor NC): When the counter gear speed sensor has a malfunction, 5th upshift is prohibited.
(c) Shift solenoid valve DSL: When the solenoid valve DSL has a malfunction, the current to the solenoid valve is stopped.
This stops lock-up control, then fuel economy decreases.
(d) Shift solenoid valve SL1, SL2, SL3 and S4: Fail safe function: If either of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid "ON" and "OFF" in order to shift into the gear positions shown in the table below.
Manual shifting as shown in the following table must be done (In case of a short circuit, the ECM stops sending the current to the short circuited solenoid).
Even if starting the engine in the fail-safe mode, the gear position remains in the same position.
HINT: FL: Flex Lock-up
Dtc clear
(A) when using the obd ii scan tool or intelligent
tester: clearing the dtcs.
(1) Connect the intelligent tester together with the
CAN VIM (controller area network vehicle
interface module) to the ...
Data list / active test
1. DATA LIST
HINT:
Using the intelligent tester to read the DATA LIST allows
the values or states of switches, sensors, actuators and
other items to be read without removing any parts. This
non-i ...
Other materials:
Disassembly
1. REMOVE FRONT DIFFERENTIAL RING GEAR
(a) Place the match-marks on the ring gear and
differential case.
(b) Remove the 16 bolts.
(c) Using a plastic hammer, tap ring gear to remove it
from the case.
2. REMOVE FRONT DIFFERENTIAL SIDE GEAR
(a) Remove the differential LH case fr ...
Pressure Control Solenoid "C" Electrical (Shift
Solenoid Valve SL3)
DESCRIPTION
Shifting from 1st to 5th is performed in combination with "ON" and "OFF"
operation of the shift solenoid
valves SL1, SL2, SL3, S4 and SR which are controlled by the ECM. If an open or
short circuit occurs in
either of the shift solenoid valves, the ECM controls ...
On-vehicle inspection
1. Inspect intake air surge tank assembly
(A) inspection procedure when applying voltage
between the terminals:
(1) Disconnect the connector from the intake air
control valve.
(2) Apply battery voltage between terminals 1 (-)
and 2 (+) of the intake air control valve. Check
that a click ...
