Toyota Sienna Service Manual: Distance Control Switch Circuit

DESCRIPTION

The distance control switch sets the vehicle-to-vehicle distance mode. The distance control switch is installed in the steering pad switch. The vehicle-to-vehicle distance set value can be changed by operating the steering pad switch (distance control switch) while the dynamic laser cruise control system is in operation.

WIRING DIAGRAM

INSPECTION PROCEDURE

1 INSPECT STEERING PAD SWITCH ASSEMBLY

1. Remove the steering pad switch assembly

1. Measure the resistance according to the value(s) in the table below.

Standard resistance

HINT: When a malfunction is detected in the distance control switch, replace the steering pad switch assembly.

2 INSPECT SPIRAL CABLE

NOTICE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may cause airbag deployment. Be sure to read the page shown in the brackets.

HINT:

•  Removal (34)
•  Installation

1. Remove the spiral cable.
2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

HINT: The spiral cable makes a maximum of approximately 5 rotations.

3 CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - SPIRAL CABLE)

1. Disconnect the D2 distance control ECU connector.
2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

4 CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - BODY GROUND)

1. Measure the resistance according to the value(s) in the table below.

Standard resistance

5 INSPECT DISTANCE CONTROL ECU

1. Remove the distance control ECU with the connector.
2.  Turn the ignition switch to the ON position.
3.  Measure the voltage according to the value(s) in the table below.

Standard voltage

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE