Cruise Main Indicator Light Circuit: Description

WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

The ECM detects a cruise control switch signal and sends it to the combination meter through CAN and BEAN. Then the CRUISE main indicator light comes on.
The CRUISE main indicator light circuit uses CAN and BEAN for communication. If there is a malfunction in this circuit, check for DTCs in the CAN communication system and multiplex communication system before troubleshooting this circuit.

PERFORM ACTIVE TEST USING INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.
Check the CRUISE main indicator light by performing ACTIVE TEST.

Combination meter:

ACTIVE TEST REFERENCE CHART

Item	Test Details	Diagnostic Note
CRUISE INDIC	Turns CRUISE main indicator light ON / OFF	-

OK:

Indicator light comes on / goes off.

NG : REPLACE COMBINATION METER ASSEMBLY

OK : Go To Next Step

READ VALUE ON INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the intelligent tester main switch on.
Check the DATA LIST for proper functioning of the CRUISE main indicator light.

ECM (Cruise control):

DATA LIST REFERENCE

Item	Measurement Item / Di(Range)	Normal Condition	Diagnostic Note
CCS INDICATOR M	Cruise indicator signal (Main CPU) / ON or OFF	ON: "CRUISE" on OFF: "CRUISE" off	-

OK:

When the cruise control main switch is operated, the display changes as shown above.

NG : REPLACE ECM

OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE