Toyota Sienna Service Manual: 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 windshield wipers operate in the HI or LO mode.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT WASHER SYSTEM
- Check that the front washer operates.
OK: Washer function is normal.
2 CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - WINDSHIELD WIPER SWITCH)
- Disconnect the D2 distance control ECU connector and C12 windshield wiper switch connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
Wiper Signal Circuit
DESCRIPTION
The distance control ECU detects wiper operation. If the windshield wipers
operate in the HI or LO mode,
the cruise control is canceled and the warning sound "pong" is emitte ...
Cruise Main Indicator Light Circuit
DESCRIPTION
When the cruise control main switch is on, the CRUISE main indicator light
and READY indicator light
come on. This indicates the control condition (presence or absence of a vehicle
i ...
Other materials:
Rear Air Outlet Damper Position Sensor Circuit
DESCRIPTION
This sensor detects the position of the rear air outlet control servo motor
and sends the appropriate
signals to the A/C amplifier. The position sensor is built in the rear air
outlet control servo motor.
The position sensor's resistance changes as the rear air outlet contro ...
On-vehicle inspection
1. INSPECT FRONT AIRBAG SENSOR (VEHICLE NOT
INVOLVED IN COLLISION)
Perform a diagnostic system check.
2. INSPECT FRONT AIRBAG SENSOR (VEHICLE
INVOLVED IN COLLISION AND AIRBAG HAS NOT
DEPLOYED)
Perform a diagnostic system check.
When the front bumper of the vehicle o ...
Radar Sensor Malfunction
DTC P1570 Radar Sensor Malfunction
DESCRIPTION
The laser sensor emits laser beams towards an object in front and measures
the distance and direction of
the object by receiving the beam reflections. Based on the reflections, the
sensor calculates the difference
in speed between your own vehic ...
