Inspection Procedure

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

HINT:

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

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

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

Skid control ECU

ACTIVE TEST REFERENCE CHART

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: GO TO Next Step

CHECK FOR DTC

Turn the ignition switch ON.
Check that the VSC TRAC warning light illuminates.
Check if the same DTCs are recorded.

Result:

RESULT REFERENCE CHART

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

B: REPAIR CIRCUIT INDICATED BY OUTPUT DTC

A: GO TO Next Step

CHECK WARNING LIGHT
1. Check the warning lights other than VSC OFF indicator light.
OK: GO TO step 5

NG: GO TO Next Step

INSPECT RELAY (Marking: IG1 NO, 2)

Remove the IG1 NO. 2 relay from the cowl side junction block LH.
Measure the resistance of the relay.

Standard resistance

STANDARD RESISTANCE REFERENCE CHART

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

Fig 1: Identifying IG1 NO. 2 Relay From Cowl Side Junction Block LH

OK: CHECK COMBINATION METER (COMBINATION METER CIRCUIT)

CHECK VSC OFF INDICATOR LIGHT
1. Check for open circuit in the combination meter circuit.
NG: REPLACE COMBINATION METER

OK: GO TO Next Step
CHECK WIRE HARNESS (SKID CONTROL ECU ASSEMBLY - VSC OFF INDICATOR LIGHT)
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: GO TO Next Step
INSPECT CENTER DIFFERENTIAL SWITCH
1. Check the center differential switch (see DISASSEMBLY ).
NG: REPLACE CENTER DIFFERENTIAL SWITCH

OK: GO TO Next Step
CHECK WIRE HARNESS (CENTER DIFFERENTIAL SWITCH - BODY GROUND)
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE SKID CONTROL ECU ASSEMBLY