Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

When not using an intelligent tester, go to the combination meter system (See HOW TO PROCEED WITH TROUBLESHOOTING ).

PERFORM ACTIVE TEST USING INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.

Select the ACTIVE TEST, use the intelligent tester to generate a control command, and then check that the CRUISE main indicator light comes on.

Combination meter (Meter ECU):

COMBINATION METER (METER ECU) REFERENCE TABLE

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

OK:

Indicator light comes on.

NG: REPLACE COMBINATION METER ASSEMBLY

OK: Go to Next Step

READ VALUE ON INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.
Turn the ignition switch on, and turn the intelligent tester main switch on.

Check the DATA LIST for proper functioning of the CRUISE main indicator light.

ECM (Cruise control):

NORMAL CONDITION TABLE

Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
CCS READY M	Cruise control system standby condition (Main CPU) / ON or OFF	Each time main switch is pushed, ON / OFF changes	1
CCS INDICATOR M	Cruise indicator signal (Main CPU) / ON or OFF	ON: "CRUISE" ON OFF: "CRUISE" OFF	2

OK:

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

HINT:

1 is OK, but 2 is NG → DTC output or ECM failure

NG: REPLACE ECM

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