Toyota Sienna Service Manual: For rear air conditioning system
ON-VEHICLE INSPECTION
1. INSPECT REAR AIR MIX 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 "HOT" side smoothly.
(2) Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4, then check that the arm turns to "COOL" side smoothly.
If the operations are not as specified, replace the rear radiator unit sub-assembly (rear air mix control servo motor).
For front passenger side
ON-VEHICLE INSPECTION
1. INSPECT AIR MIX CONTROL SERVO MOTOR
(a) Remove the air mix control servo motor.
(b) Connect the positive (+) lead from the battery to
terminal 4 and negative (-) lea ...
Rear blower resistor
ON-VEHICLE INSPECTION
1. INSPECT REAR BLOWER MOTOR CONTROLLER
(a) Measure resistance according to the value(s) in the
table below..
Standard resistance
If the resistance is not as specif ...
Other materials:
Inspection
1. INSPECT FRONT SPEED SENSOR
(a) Make sure that there is no looseness at the
connector lock part and connecting part of the
connector.
(b) Disconnect the speed sensor connector.
(c) Measure the resistance between terminals 1 and 2
of the speed sensor connector.
OK:
Resistance:
0.92 ...
Washer Signal Circuit
DESCRIPTION
The distance control ECU detects washer operation. The cruise control will be
cancelled by the distance
control ECU if the windshield wipers operate in the HI or LO mode. By detecting
washer operation, the
distance control ECU allows the cruise control to continue even when the
...
Brake Switch "A" Circuit
DTC P0571 Brake Switch "A" Circuit
DESCRIPTION
When the brake pedal is depressed, the stop light switch sends a signal to
the ECM. When the ECM
receives this signal, it cancels the cruise control. The fail-safe function
operates to enable normal driving
even if there is a malfuncti ...
