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

Toyota Tacoma (2015-2018) Service Manual / Cruise Control / Cruise Control System(for 2gr-fks) / 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.

(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.

GO TO METER / GAUGE SYSTEM

2.	READ VALUE USING TECHSTREAM (CRUISE CONTROL SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to 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	-

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.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE ECM

Cruise Control Switch Circuit

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Other materials:

Components
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