Toyota Tacoma manuals

Toyota Tacoma (2015-2018) Service Manual: Cruise Main Indicator Light Circuit

DESCRIPTION

  • When the ECM detects a cruise control switch on signal from the cruise control switch, the ECM sends the signal to the combination meter assembly through CAN communication. Then the cruise control indicator light turns on.
  • The cruise control indicator light circuit uses CAN communication. If there is a malfunction in this circuit, check for DTCs in the CAN communication system before troubleshooting this circuit.

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (CRUISE MAIN INDICATOR LIGHT)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(e) According to the display on the Techstream, perform the Active Test.

Combination Meter

Tester Display

Test Part

Control Range

Diagnostic Note

Indicat. Lamp Cruise

Cruise main indicator light

ON/OFF

Confirm that the vehicle is stopped with the engine idling.

OK:

Cruise main indicator light turns on/off.

NG

GO TO METER / GAUGE SYSTEM

OK

2.

READ VALUE USING TECHSTREAM (CRUISE 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 / Cruise Control / Data List.

(e) According to the display on the Techstream, read the Data List.

Cruise Control

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Main SW M-CPU

Cruise control switch (Main CPU) / OFF or ON

OFF: Cruise control switch off

ON: Cruise control switch on

-

OK:

On screen, item changes between ON and OFF according to above chart.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE ECM

Cruise Control Switch Circuit
DESCRIPTION This circuit sends signals to the ECM depending on the cruise control main switch condition. The battery supplies the positive (+) battery voltage to the cruise control main switch. ...

TC and CG Terminal Circuit
DESCRIPTION The DLC3 circuit enables reading of Diagnostic Trouble Codes (DTCs) with no Techstream by connecting terminals TC and CG of the DLC3 connector. Stored DTCs are displayed in blinking pa ...

Other materials:

Check Bus 2 Line for Short to +B
DESCRIPTION There may be a short circuit between one of the CAN bus lines and +B when no resistance exists between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (network gateway ECU) and ...

Removal
REMOVAL PROCEDURE 1. REMOVE REAR SEATBACK HINGE COVER 2. REMOVE REAR SEATBACK ASSEMBLY 3. REMOVE REAR SEATBACK HINGE SUB-ASSEMBLY 4. REMOVE REAR DOOR SCUFF PLATE 5. DISCONNECT REAR DOOR OPENING TRIM WEATHERSTRIP (a) Disconnect the rear door opening trim weatherstrip to ...

System Description
SYSTEM DESCRIPTION GENERAL The cruise control main switch is used to turn the dynamic radar cruise control system on and off, as well as operate 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP and CANCEL. The SET, TAP-DOWN, and - (COAST) functions, and the RES (RESUME) ...

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