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 ).

HINT:

Start the inspection from step 1 when using the hand-held tester and start from step 3 when not using the hand-held tester.

READ VALUE OF HAND-HELD TESTER (MOMENTARY INTERRUPTION OF REAR SPEED SENSOR) (See CHECK FOR INTERMITTENT PROBLEMS )

Connect the hand-held tester to the DLC3.
Turn the ignition switch to the ON position and push the hand-held tester main switch ON.

Select "DATA LIST" mode on the hand-held tester.

ITEMS NORMAL CONDITION TABLE

Item	Measurement Item/Range (Display)	Normal Condition	Diagnostic Note
SPD SEN RR	Speed sensor open detection (RR)/OPN DET or NORMAL	OPN DET: Momentary interruption NORMAL: Normal	-
SPD SEN RL	Speed sensor open detection (RL)/OPN DET or NORMAL	OPN DET: Momentary interruption NORMAL: Normal	-

Check for any momentary interruption in the wire harness and connector corresponding to a DTC.
OK: There are no momentary interruptions.

HINT:

Perform the above inspection before removing the sensor and connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPEED SENSOR CIRCUIT)

OK: Go to next step

READ VALUE OF HAND-HELD TESTER (REAR SPEED SENSOR)

ITEMS NORMAL CONDITION TABLE

Item	Measurement Item/Range (Display)	Normal Condition	Diagnostic Note
WHEEL SPD RR	Wheel speed sensor (RR) reading/min.: 0 mph (0 km/h), max.: 202 mph (326 km/h)	Actual wheel speed	Similar speed as indicated on speedometer
WHEEL SPD RL	Wheel speed sensor (RL) reading/min.: 0 mph (0 km/h), max.: 202 mph (326 km/h)	Actual wheel speed	Similar speed as indicated on speedometer

Check that there is no difference between the speed value output from the speed sensor displayed on the hand-held tester and the speed value displayed on the speedometer when driving the vehicle.
OK: The speed value output from the speed sensor displayed on the hand-held tester is the same as the actual vehicle speed.

NG: Go to step 4

OK: Go to next step

PERFORM TEST MODE (SIGNAL CHECK) (See TEST MODE PROCEDURE )

Check if test mode (signal check) DTCs are detected.

Result:

RESULT REFERENCE

Test mode (signal check) DTC is output	A
Test mode (signal check) DTC is not output	B

B: Go to step 9

A: Go to next step

INSPECT REAR SPEED SENSOR INSTALLATION
1. Check the speed sensor installation.
  OK:
  - The installation nut is tightened properly.
    Torque: 8.3 N.m (85 kgf.cm, 73 in.lbf)
  - There is no clearance between the sensor and the rear axle.
    
    Fig 1: Identifying Rear Speed Sensor Proper Installation
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: INSTALL REAR SPEED SENSOR CORRECTLY OR REPLACE REAR SPEED SENSOR (See SPEED SENSOR REAR LH )

NOTE: Check the speed sensor signal after replacement (see TEST MODE PROCEDURE ).

OK: Go to next step
INSPECT SPEED SENSOR TIP
1. Remove the rear speed sensor (See SPEED SENSOR REAR LH ).
2. Check the sensor tip.
  OK: No scratches or foreign matter on the sensor tip.
NG: CLEAN OR REPLACE REAR SPEED SENSOR (See SPEED SENSOR REAR LH )

NOTE: Check the speed sensor signal after cleaning/replacement (See TEST MODE PROCEDURE ).

OK: Go to next step

INSPECT REAR SPEED SENSOR AND SKID CONTROL SENSOR WIRE

Install the rear speed sensor.
Turn the ignition switch off.
Disconnect the rear speed sensor connector.

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

Fig 2: Measuring Resistance Between Rear Speed Sensor Connectors & Body Ground

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard:

RH:

TERMINALS RESISTANCE SPECIFICATION TABLE

Tester Connection	Specified Condition
A41-2 (RR+) - Body ground	10 k or higher
A41-1 (RR-) - Body ground	10 k or higher

LH:

TERMINALS RESISTANCE SPECIFICATION TABLE

Tester Connection	Specified Condition
A40-2 (RL+) - Body ground	10 k or higher
A40-1 (RL-) - Body ground	10 k or higher

Skid Control Sensor Wire:

Disconnect the skid control sensor wire.

Measure the resistance according to the value(s) in Fig 3.

Fig 3: Identifying Skid Control Sensor Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard:

RH:

TERMINALS RESISTANCE SPECIFICATION TABLE

Tester Connection	Specified Condition
A41 ("A"-2) - A41 ("B"-4)	Below 1
A41 ("A"-2) - A41 ("B"-3)	10 k or higher
A41 ("A"-2) - Body ground	10 k or higher
A41 ("A"-1) - A41 ("B"-3)	Below 1
A41 ("A"-1) - A41 ("B"-4)	10 k or higher
A41 ("A"-1) - Body ground	10 k or higher

LH:

TERMINALS RESISTANCE SPECIFICATION TABLE

Tester Connection	Specified Condition
A40 ("A"-2) - A40 ("B"-2)	Below 1
A40 ("A"-2) - A40 ("B"-1)	10 k or higher
A40 ("A"-2) - Body ground	10 k or higher
A40 ("A"-1) - A40 ("B"-1)	Below 1
A40 ("A"-1) - A40 ("B"-2)	10 k or higher
A40 ("A"-1) - Body ground	10 k or higher

NG: REPLACE REAR SPEED SENSOR OR SKID CONTROL SENSOR WIRE

NOTE: Check the speed sensor signal after replacement (See TEST MODE PROCEDURE ).

OK: Go to next step

CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND REAR SPEED SENSOR) (See HOW TO PROCEED WITH TROUBLESHOOTING )

Disconnect the skid control ECU connector.

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

Standard:

RH:

TERMINALS RESISTANCE SPECIFICATION TABLE

Tester Connection	Specified Condition
S28-5 (RR+) - A41 (A-4) (RR+)	Below 1
S28-5 (RR+) - Body ground	10 k or higher
S28-19 (RR-) - A41 (A-3) (RR-)	Below 1
S28-19 (RR-) - Body ground	10 k or higher

LH:

TERMINALS RESISTANCE SPECIFICATION TABLE

Tester Connection	Specified Condition
S28-20 (RL+) - A40 (A-2) (RL+)	Below 1
S28-20 (RL+) - Body ground	10 k or higher
S28-6 (RL-) - A40 (A-1) (RL-)	Below 1
S28-6 (RL-) - Body ground	10 k or higher

Fig 4: Identifying Skid Control ECU & Rear Speed Sensor Connectors

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT MASTER CYLINDER SOLENOID

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

Measure the voltage according to the value(s) in Fig 5.

Fig 5: Identifying Rear Speed Sensor Connectors

Standard:

RH:

TERMINALS VOLTAGE SPECIFICATION TABLE

Tester Connection	Specified Condition
A41 (A-4) (RR+) - Body ground	7.5 to 12 V

LH:

TERMINALS VOLTAGE SPECIFICATION TABLE

Tester Connection	Specified Condition
A40 (A-2) (RL+) - Body ground	7.5 to 12 V

NG: REPLACE MASTER CYLINDER SOLENOID (See OVERHAUL )

OK: Go to next step

RECONFIRM DTC

Clear the DTCs (See DTC CHECK/CLEAR ).
Drive the vehicle at a speed of approximately 20 mph (32 km/h) or more for 60 seconds or more.
Check if the same pending DTCs are detected (see DTC CHECK/CLEAR ).

HINT:

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

Result:

RESULT REFERENCE

DTC is output	A
DTC is not output (When troubleshooting in accordance with the DTC TABLE.)	B
DTC is not output (When troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE.)	C

B: END

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

A: Go to next step

REPLACE REAR SPEED SENSOR
1. Replace the rear speed sensor (See SPEED SENSOR REAR LH ).
  NOTE: Check the speed sensor signal after replacement (See TEST MODE PROCEDURE ).
RECONFIRM DTC
1. Clear the DTCs (See DTC CHECK/CLEAR ).
2. Drive the vehicle at a speed of approximately 20 mph (32 km/h) or more for 60 seconds or more.
3. Check if the same pending DTCs are detected (See DTC CHECK/CLEAR ).
HINT:

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

Result:
RESULT REFERENCE

DTC is output A

DTC is not output B

B: END

A: Go to next step
INSPECT SPEED SENSOR ROTOR
1. Remove the rear axle bearing assy (See REPLACEMENT ).
2. Check the sensor rotor.
  OK: No scratches, oil, or foreign matter on the rotors.
NG: CLEAN OR REPLACE REAR AXLE BEARING ASSY (SPEED SENSOR ROTOR) (See REPLACEMENT )

NOTE: Check the speed sensor signal after cleaning/replacement (See TEST MODE PROCEDURE ).

OK: Go to next step

REPLACE MASTER CYLINDER SOLENOID (See OVERHAUL )