Problem Symptoms Table

If there are no DTCs output but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.

VEHICLE STABILITY CONTROL SYSTEM

Symptom

Suspected area

See page

ABS,BA and/or EBD does not operate

1. Check the DTC again and make sure that the normal system code is output

BC-121

2. IG power source circuit

BC-177

3. Speed sensor circuit (Front)

BC-133

4. Speed sensor circuit (Rear)

BC-141

5. Check the ABS & TRACTION actuator assembly with the intelligent tester (Check ABS & TRACTION actuator assembly operation using the active test function) If abnormal, check the hydraulic circuit for leakage

BC-240

6. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the ABS & TRACTION actuator assembly (skid control ECU)

BC-241

ABS, BA and/or EBD does not operate efficiently

1. Check the DTC again and make sure that the normal system code is output

BC-121

2. Speed sensor circuit (Front)

BC-133

3. Speed sensor circuit (Rear)

BC-141

4. Stop light switch circuit

BC-184

5. Check the ABS & TRACTION actuator assembly with the intelligent tester (Check ABS & TRACTION actuator assembly operation using the active test function) If abnormal, check the hydraulic circuit for leakage

BC-240

6. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the ABS & TRACTION actuator assembly (skid control ECU)

BC-241

VSC and/or TRACTION does not operate

1. Check the DTC again and make sure that the normal system code is output

BC-121

2. IG power source circuit and ground circuit

BC-177

3. Check the hydraulic circuit for leakage

-

4. Speed sensor circuit (Front)

BC-133

5. Speed sensor circuit (Rear)

BC-141

6. Yaw rate/Acceleration sensor circuit (Calibration Malfunction)

BC-165

7. Yaw rate/Acceleration sensor circuit (Circuit Malfunction)

BC-173

8. Steering sensor circuit

BC-168

9. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the ABS & TRACTION actuator assembly (skid control ECU)

BC-241

ABS sensor DTC check cannot be done

1. Check the DTC again and make sure that the normal system code is output

BC-121

2. TC and CG terminal circuit

BC-233

3. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the ABS & TRACTION actuator assembly (skid control ECU)

BC-241

Symptom

Suspected area

See page

VSC sensor DTC check cannot be done

1. Check the DTC again and make sure that the normal system code is output

BC-121

2. TC and CG terminal circuit

BC-233

3. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the ABS & TRACTION actuator assembly (skid control ECU)

BC-241

Sensor signal check cannot be done

1. TS and CG terminal circuit

BC-237

2. ABS & TRACTION actuator assembly (skid control ECU)

BC-241

ABS warning light abnormal (Remains on)

1. ABS warning light circuit

BC-202

2. ABS & TRACTION actuator assembly (skid control ECU)

BC-241

ABS warning light abnormal (Does not come on)

1. ABS warning light circuit

BC-206

2. ABS & TRACTION actuator assembly (skid control ECU)

BC-241

VSC warning light abnormal (Remains on)

1. VSC warning light circuit

BC-208

2. ABS & TRACTION actuator assembly (skid control ECU)

BC-241

VSC warning light abnormal (Does not come on)

1. VSC warning light circuit

BC-212

2. ABS & TRACTION actuator assembly (skid control ECU)

BC-241

BRAKE warning light abnormal (Remains on)

1. BRAKE warning light circuit

BC-214

2. ABS & TRACTION actuator assembly (skid control ECU)

BC-241

BRAKE warning light abnormal (Does not come on)

1. BRAKE warning light circuit

BC-221

2. ABS & TRACTION actuator assembly (skid control ECU)

BC-241

SLIP indicator light abnormal (Remains on)

1. SLIP indicator light circuit

BC-223

2. ABS & TRACTION actuator assembly (skid control ECU)

BC-241

SLIP indicator light abnormal (Does not come on)

1. SLIP indicator light circuit

BC-227

2. ABS & TRACTION actuator assembly (skid control ECU)

BC-241

Skid control buzzer abnormal

1. Skid control buzzer circuit

BC-229

2. ABS & TRACTION actuator assembly (skid control ECU)

BC-241

TERMINALS OF ECU

1. Terminals of ECU

Symbols (Terminal No.)

Terminal Description

GND 2 (1)

Motor ground

BM (2)

Motor relay test input

FR+ (3)

Front RH wheel speed signal input (+)

FL- (4)

Front LH wheel speed signal input (-)

RR+ (5)

Rear RH wheel speed signal input (+)

RL- (6)

Rear LH wheel speed signal input (-)

CANH (11)

Can communication line H

SP1 (12)

Speed signal output

DG (13)

Diagnostic tester communication line

MRF (14)

Fail safe motor relay output

MR (15)

Motor relay output

STPO (16)

Stop light relay output

FR- (17)

Front RH wheel speed signal input (-)

FL+ (18)

Front LH wheel speed signal input (+)

RR- (19)

Rear RH wheel speed signal input (-)

RL+ (20)

Rear LH wheel speed signal input (+)

STP2 (21)

Stop light relay output

TS (24)

Sensor check input

CANL (25)

Can communication line L

STP1 (27)

Stop light switch input

PKB (28)

Parking brake switch input

BZ (30)

Buzzer output

+BS (31)

Solenoid relay power supply

GND1 (32)

Skid control ECU ground

RRO (39)

Rear RH wheel speed signal output

RLO (40)

Rear LH wheel speed signal output

R+ (45)

Power supply for motor relay

IG1 (46)

IG1 power supply

2. Terminal Inspection

(a) Disconnect the connector and measure the voltage on the wire harness side. HINT:

Voltage cannot be measured with the connector connected to the skid control ECU as the connector is watertight.

Skid Control ECU (harness side connector front view)

1

2

31

32

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

I

U

U

U

U

33|34|35|36|37|38|39|40|41|42|43|44|45|46|

Symbols (Terminal No.)

Wining Color

Terminal Description

Condition

Specified Condition

GND2 (1) - Body ground

W-B - Body ground

Motor ground

IG switch OFF

Below 1 Q

STP (27)- GND (1,32)

L-B - W-B

Stop light switch input

Stop light switch ON (Brake pedal pushed)

8 to 14 V

STP (27)- GND (1,32)

L-B - W-B

Stop light switch input

Stop light switch OFF (Brake pedal released)

Below 1.5 Q

PKB (28)- GND (1,32)

V - W-B

Parking brake switch input

IG switch ON (IG), parking brake switch ON

Below 1 Q

PKB (28)- GND (1,32)

V - W-B

Parking brake switch input

IG switch ON (IG), parking brake switch OFF

10 kQ or higher

+BS (31)- GND (1,32)

L - W-B

Solenoid relay power supply

Always

10 to 14 V

GND1 (32) - Body ground

W-B - Body ground

Skid control ECU ground

IG switch OFF

Below 1 Q

IG1 (46) - GND (1,32)

BR - W-B

IG1 power supply

IG switch ON (IG)

10 to 14 V

ABS Warning Light

BRAKE Warning Light

USA:

BRAKE

Canada:

Canada:

(©)

(0)

VSC Warning Light

SLIP Indicator Light

VSC

F048465E03

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