Toyota Tacoma (2015-2018) Service Manual: Distance Control Switch Circuit

Toyota Tacoma (2015-2018) Service Manual / Cruise Control / Dynamic Radar Cruise Control System(for 2tr-fe) / Distance Control Switch Circuit

DESCRIPTION

The distance control switch is used to set the distance for vehicle-to-vehicle distance control mode. The distance control switch is installed in the steering pad switch assembly. The vehicle-to-vehicle distance set value can be changed by operating the steering pad switch assembly (distance control switch) while the dynamic radar cruise control system is controlling vehicle speed in vehicle-to-vehicle distance control mode.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the ECM, refer to Registration.
w/o Smart Key System: Click here

w/ Smart Key System: Click here
The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.
Click here
When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
If the forward recognition camera has been replaced with a new one, be sure to perform Forward Recognition Camera Learning.
Click here

PROCEDURE

1.	READ VALUE ON TECHSTREAM (DISTANCE CONTROL SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Powertrain / Radar Cruise 2 / Data List.

(e) Read the Data List according to the display on the Techstream.

Powertrain > Radar Cruise2 > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Distance Control Switch	Distance control switch signal	ON or OFF	ON: Distance control switch on OFF: Distance control switch off	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Distance Control Switch

Distance control switch signal

ON or OFF

ON: Distance control switch on

OFF: Distance control switch off

OK:

The Data List item shown in the table changes according to the operation of the steering pad switch assembly (distance control switch).

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Remove the steering pad switch assembly.

Click here (b) Inspect the steering pad switch assembly.

(b) Inspect the steering pad switch assembly.

Click here

REPLACE STEERING PAD SWITCH ASSEMBLY

3.	INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

(a) Remove the spiral cable with sensor sub-assembly.

Click here (b) Inspect the spiral cable with sensor sub-assembly.

(b) Inspect the spiral cable with sensor sub-assembly.

Click here

REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

4.	CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA, ECM AND BODY GROUND)

(a) Disconnect the S8 spiral cable with sensor sub-assembly connector.

(b) Disconnect the F46 forward recognition camera connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
S8-12 (DIST) - F46-3 (LKSW)	Always	Below 1 Ω
S8-2 (ECC) - E20-21 (ECCS)	Always	Below 1 Ω
S8-12 (DIST) or F46-3 (LKSW) - Body ground	Always	10 kΩ or higher
S8-2 (ECC) or E20-21 (ECCS) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

(a) Disconnect the E20 ECM connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
S8-2 (ECC) or E20-21 (E1) -Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	CHECK ECM (ECM TERMINALS)

(a) Disconnect the E20 and E17 ECM connectors.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E20-21 (ECCS) - E17-3 (E1)	Always	Below 1 Ω

REPLACE FORWARD RECOGNITION CAMERA

REPLACE ECM

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