Inspection Procedure

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

INSPECT SKID CONTROL ECU (EXI4 TERMINAL)

Disconnect the skid control ECU connector.
Turn the ignition switch to the ON position.

Measure the voltage according to the value(s) in the table below.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection	Condition	Specified Condition
S37-21 (EXI4) - Body ground	Transfer indicator switch ON (Shift L4 position)	Below 1.5 V
S37-21 (EXI4) - Body ground	Transfer indicator switch OFF (Any shift position except L4)	8 to 14 V

Fig 1: Identifying Skid Control ECU Connector S37

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 4

OK: Go to Next Step

PERFORM TEST MODE (SIGNAL CHECK)

Reconnect the skid control ECU connector.
Check if the test mode (signal check) DTC is detected.

Result

RESULT TABLE

Condition	Proceed to
Test mode (signal check) DTC is output	A
Test mode (signal check) DTC is not output (When troubleshooting in accordance with DIAGNOSTIC TROUBLE CODE TABLE .)	B
Test mode (signal check) DTC is not output (When troubleshooting in accordance with PROBLEM SYMPTOMS TABLE .)	C

B: REPAIR OR REPLACE HARNESS OR CONNECTOR (L4 CIRCUIT)

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

A: Go to Next Step

RECONFIRM DTC

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

Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

Result

RESULT TABLE

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

B: END

A: REPLACE MASTER CYLINDER SOLENOID

INSPECT TRANSFER INDICATOR SWITCH

Disconnect the transfer indicator (L4) switch connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection	Condition	Specified Condition
D1-1 - D1-2	Switch pin pushed in	Below 1 Ω
D1-1 - D1-2	Switch pin free	10 kΩ or higher

Fig 2: Identifying Transfer Indicator Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE TRANSFER INDICATOR SWITCH

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRANSFER INDICATOR SWITCH)

Fig 3: Identifying Skid Control ECU Connector Terminals S37

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection	Specified Condition
S37-21 (EXI4) - D1-1	Below 1 Ω
S37-21 (EXI4) - Body ground	10 kΩ or higher
D1-2 - Body ground	Below 1Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (EXI4 CIRCUIT)

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (TRANSFER INDICATOR SWITCH - ECM)

Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection	Specified Condition
E7-13 (L4) - D1-1	Below 1 Ω
E7-13 (L4) - Body ground	10 kΩ or higher

Fig 4: Identifying ECM Connectors

Result

RESULT TABLE

Condition	Proceed to
OK (When troubleshooting in accordance with DIAGNOSTIC TROUBLE CODE TABLE .)	A
OK (When troubleshooting in accordance with PROBLEM SYMPTOMS TABLE .)	B
NG	C

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

C: REPAIR OR REPLACE HARNESS OR CONNECTOR

A: END