Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000001BU6007X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: VSC OFF Indicator Light Circuit; 2007 MY LX470 [08/2006 -        ]

VSC OFF Indicator Light Circuit

DESCRIPTION

This is the VSC control main switch. When the center differential is locked, VSC control goes off and the VSC OFF indicator light lights up.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

When using the intelligent tester, start from *1. When not using the intelligent tester, start from *2.

PROCEDURE

1.

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (VSC OFF INDICATOR)*1

(a) Select the ACTIVE TEST, generate a control command, and then check that the VSC OFF indicator light operates.

Skid control ECU

Item

Vehicle Condition / Test Details

Diagnostic Note

VSC/ TRC OFF IND

Turn VSC/TRC OFF indicator ON / OFF

Observe combination meter

OK:

VSC OFF indicator turns on or off.

NG

GO TO STEP 3

OK

2.

CHECK FOR DTC

(a) Turn the ignition switch ON.

(b) Check that the the VSC TRAC warning light illuminates.

(c) Check if the same DTCs are recorded.

Result:

Result

Proceed to

DTC is not output

A

DTC is output

B
B

REPAIR CIRCUIT INDICATED BY OUTPUT DTC

A

3.

CHECK WARNING LIGHT

(a) Check the warning lights other than VSC OFF indicator light.

OK

GO TO STEP 5

NG

4.

INSPECT RELAY (Marking: IG1 NO. 2)

(a) Remove the IG1 NO. 2 relay from the cowl side junction block LH.

(b) Measure the resistance of the relay.

Standard resistance:

Tester Connection

Specified Condition

1 - 2

10 kΩ or higher

1 - 2

Below 1 Ω

(when battery voltage is applied to terminals 3 and 4)
NG

REPLACE RELAY

OK

CHECK COMBINATION METER (COMBINATION METER CIRCUIT)

5.

CHECK VSC OFF INDICATOR LIGHT

(a) Check for open circuit in the combination meter circuit.

NG

REPLACE COMBINATION METER

OK

6.

CHECK WIRE HARNESS (SKID CONTROL ECU ASSEMBLY - VSC OFF INDICATOR LIGHT)
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

7.

INSPECT CENTER DIFFERENTIAL SWITCH

(a) Check the center differential switch 2007 MY LX470 [08/2006 -        ]; HF2A TRANSFER: CENTER DIFFERENTIAL LOCK SWITCH: INSPECTION .

NG

REPLACE CENTER DIFFERENTIAL SWITCH

OK

8.

CHECK WIRE HARNESS (CENTER DIFFERENTIAL SWITCH - BODY GROUND)
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

REPLACE SKID CONTROL ECU ASSEMBLY