THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): HOW TO PROCEED WITH TROUBLESHOOTING (2008 LX570)

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Last Modified: 11-27-2007		1.6 D
Service Category: Vehicle Interior	Section: Theft Deterrent/Keyless Entry
Model Year: 2008	Model: LX570	Doc ID: RM000000YEF02VX
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): HOW TO PROCEED WITH TROUBLESHOOTING (2008 LX570)

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:

Use these procedures to troubleshoot the push-button start function.
*: Use the Techstream.

1.	VEHICLE BROUGHT TO WORKSHOP

2.	INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding.

3.	INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check if the CAN communication system is functioning normally .

Result

Result	Proceed to
DTC is not output	A
DTC is output	B

GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

4.	CHECK FOR DTC*

(a) Check for DTCs and note any output DTCs .

(b) Clear the DTCs.

(c) Check whether the same DTC(s) relevant to the SFI system or smart access system with push-button start recurs by reproducing the symptoms indicated by the noted DTC(s) in the first step above.

Result

Result	Proceed to
DTC output does not reoccur	A
SFI system DTC output reoccurs	B
Smart access system with push-button start DTC output reoccurs	C

GO TO SFI SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

GO TO STEP 7

5.	PROBLEM SYMPTOMS TABLE

Result

Result	Proceed to
Fault is not listed in problem symptoms table	A
Fault is listed in problem symptoms table	B

GO TO STEP 7

6.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU

(b) Data List / Active Test

7.	ADJUST, REPAIR OR REPLACE

8.	CONFIRMATION TEST

END