Inspection Procedure

NOTE: When replacing the master cylinder solenoid, perform zero point calibration (See CALIBRATION ).

INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (EXI3)

Fig 1: Identifying Skid Control ECU A4 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage.

Standard voltage

VOLTAGE SPECIFICATION

Tester Connection	Vehicle Condition	Rear Differential Lock Indicator Light	Specified Condition
A4-26 (EXI3) - Body ground	Rear Differential free	OFF	8 to 14 V
A4-26 (EXI3) - Body ground	Rear Differential locked	ON	1.5 V

NG: Go to step 3

OK: Go to next step

RECONFIRM DTC

Clear the DTC (See DTC CHECK/CLEAR ).
Drive the vehicle at 31 mph (50 km/h) or more for 3 seconds or more with the rear differential free.

Check if the same DTC is detected (See DTC CHECK/CLEAR ).

Result

RESULT CHART

Result	Proceed to
DTC output	A
DTC not output	B

B: END

A: REPLACE MASTER CYLINDER SOLENOID (See DISASSEMBLY )

INSPECT REAR DIFFERENTIAL LOCK INDICATOR SWITCH

Fig 2: Identifying Rear Differential Lock Indicator Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
D2-1 - D2-2	Pushed	Below 1 Ω
D2-1 - D2-2	Free	10 kΩ or higher

NG: REPLACE REAR DIFFERENTIAL LOCK INDICATOR SWITCH

OK: Go to next step

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR DIFFERENTIAL LOCK INDICATOR SWITCH)

Fig 3: Identifying Skid Control ECU Connector And Rear Differential Lock Indicator Switch Connector

Measure the resistance.

Standard resistance

RESISTANCE SPECIFICATION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MASTER CYLINDER SOLENOID (See DISASSEMBLY )