Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

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

CHECK DTC

Check the DTCs (See DTC CHECK/CLEAR ).

Result:

RESULT REFERENCE

DTC is not output	A
DTC is output	B

B: REPAIR CIRCUIT ACCORDING TO OUTPUT CODE (SEE DIAGNOSTIC TROUBLE CODE TABLE )

A: Go to next step

INSPECT IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED
1. Check the skid control ECU connector's connecting condition.
  OK: The connector should be securely connected.
NG: CONNECT CONNECTOR TO ECU

OK: Go to next step
INSPECT BATTERY
1. Check the battery voltage.
  Standard: Voltage: 11 to 14 V
NG: INSPECT CHARGING SYSTEM (See ON-VEHICLE INSPECTION , ON-VEHICLE INSPECTION )

OK: Go to next step

INSPECT SKID CONTROL ECU (IG1 TERMINAL VOLTAGE)

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

Measure the voltage according to the value(s) in TERMINALS VOLTAGE SPECIFICATION TABLE .

Standard:

TERMINALS VOLTAGE SPECIFICATION TABLE

Tester Connection	Specified Condition
S28-46 (IG1) - Body ground	10 to 14 V

Fig 1: Identifying Skid Control ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

OK: Go to next step

INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY)

Disconnect the skid control ECU (S29) connector.

Measure the resistance according to the value(s) in TERMINALS RESISTANCE SPECIFICATION TABLE .

Standard:

TERMINALS RESISTANCE SPECIFICATION TABLE

Tester Connection	Specified Condition
S28-1 (GND1) - Body ground	Below 1
S28-32 (GND2) - Body ground	Below 1
S29-4 (GND3) - Body ground	Below 1

Fig 2: Identifying Skid Control ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: Go to next step

INSPECT PARKING BRAKE SWITCH

Disconnect the parking brake switch connector.

Measure the resistance according to the value(s) in TERMINALS RESISTANCE SPECIFICATION TABLE .

Standard:

TERMINALS RESISTANCE SPECIFICATION TABLE

Tester Connection	Condition	Specified Condition
P4-1 - Body ground	Parking brake switch ON (Switch pin free)	Below 1
P4-1 - Body ground	Parking brake switch OFF (Switch pin pushed in)	10 k or higher

Fig 3: Inspecting Parking Brake Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE PARKING BRAKE SWITCH

OK: Go to next step

CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND PARKING BRAKE SWITCH) (See HOW TO PROCEED WITH TROUBLESHOOTING )

Measure the resistance according to the value(s) in TERMINALS RESISTANCE SPECIFICATION TABLE .

Standard:

TERMINALS RESISTANCE SPECIFICATION TABLE

Tester Connection	Specified Condition
S28-28 (PKB) - P4-1	Below 1
S28-28 (PKB) Body ground	10 k or higher

Fig 4: Identifying Skid Control ECU Connector & Parking Brake Switch Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND COMBINATION METER) (See HOW TO PROCEED WITH TROUBLESHOOTING )

Disconnect the combination meter connector.

Measure the resistance according to the value(s) in TERMINALS RESISTANCE SPECIFICATION TABLE .

Standard:

TERMINALS RESISTANCE SPECIFICATION TABLE

Tester Connection	Specified Condition
S29-3 (BRL) - C11-2	Below 1
S29-3 (BRL) - Body ground	10 k or higher

Fig 5: Identifying Skid Control ECU Connector & Combination Meter Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT COMBINATION METER ASSY
1. Check the combination meter system (See HOW TO PROCEED WITH TROUBLESHOOTING ).
NG: REPLACE COMBINATION METER ASSY (See COMBINATION METER ASSY )

OK: REPLACE MASTER CYLINDER SOLENOID (See OVERHAUL )