AFS OFF Switch Circuit: Wiring Diagram

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.

Fig 1: Wiring Diagram - AFS OFF Switch

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

CHECK MULTIPLEX COMMUNICATION SYSTEM
Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

If the multiplex communication system is operating normally, proceed to the next step.

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester main switch on.
Select the item(s) in the ACTIVE TEST, and check the operation.

ACTIVE TEST: METER

ACTIVE TEST: METER REFERENCE

Item	Test Details	Diagnostic Note
AFS INDICATOR	AFS OFF indicator light OFF / ON	-

OK:

AFS OFF indicator comes on.

NG : GO TO COMBINATION METER SYSTEM

OK: Go To Next Step

READ VALUE OF INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester main switch on.
Turn the clearance sonar main switch on.
Select the item below in the DATA LIST, and read its value displayed on the intelligent tester.

DATA LIST: AFS ECU

DATA LIST: AFS ECU REFERENCE

Item	Measurement / Range (Display)	Normal Condition	Diagnostic Note
AFS OFF SW	AFS ON / OFF setting	OFF: AFS OFF ON: AFS ON	-

OK : REPLACE AFS ECU

NG: Go To Next Step

PERFORM SATELLITE SWITCH
1. Check operation speed and tach indicator system.
OK:

Tach indicator system operates normally.

NG : GO TO COMBINATION METER SYSTEM

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