Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the ECM, refer to Registration.

    w/o Smart Key System: Click here w/ 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.

(c) Turn the Techstream 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

-

OK:

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

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

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

NG

REPLACE STEERING PAD SWITCH ASSEMBLY

OK

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

NG

REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

OK

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.

(c) Disconnect the E20 ECM 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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

OK

REPLACE FORWARD RECOGNITION CAMERA

NG

REPLACE ECM

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