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Yaris 2007 service manual part 02

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Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02 Yaris 2007 service manual part 02

Trang 1

TIRE AND WHEEL – TIRE AND WHEEL SYSTEM TW–1

Trang 2

BRAKE SYSTEM

PRECAUTION

1 Necessary care must be taken to replace each part

properly as it could affect the brake system

performance This could cause driving hazards

Replace each part with an identical part with the

same number.

2 It is very important to keep parts and the area clean

when repairing the brake system.

3 If the vehicle is equipped with a mobile

communication system, refer to the precautions in

the INTRODUCTION section.

Trang 3

BR–4 BRAKE – BRAKE SYSTEM

Low pedal or spongy pedal

Brake drag

Brake pull

Hard pedal but braking inefficient

Trang 4

(a) Inspect the brake pedal height.

Pedal height from floor

If the pedal height is incorrect, adjust it

(b) Adjust the brake pedal height

(1) Disconnect the connector from the stop light switch

(2) Turn the stop light switch counterclockwise, and remove the stop light switch

(3) Loosen the push rod lock nut

(4) Adjust the pedal height by turning the pedal push rod

Pedal height from floor

(5) Tighten the push rod lock nut

Torque: 26 N*m (265 kgf*cm, 19 ft.*lbf)

(6) Insert the stop light switch into the adjuster until

it just touches the brake pedal

NOTICE:

Do not depress the brake pedal.

(7) Make a quarter turn clockwise to install the stop light switch

107.8 to 117.8 mm (4.244 to 4.638 in.)

107.3 to 117.3 mm (4.224 to 4.618 in.)

107.8 to 117.8 mm (4.244 to 4.638 in.)

Trang 5

BR–10 BRAKE – BRAKE FLUID

BR

BRAKE FLUID

BLEEDINGNOTICE:

Immediately wash off any brake fluid that comes into contact with any painted surfaces.

HINT:

If any work is done on the brake system or if air in the brake lines is suspected, bleed the air from the system

(a) Disengage the 3 clips and separate the hood to cowl top seal

(b) Remove the cowl top ventilator louver

(c) Set the brake fluid can upside down on the reservoir

Fluid:

SAE J1703 or FMVSS No 116 DOT3

HINT:

If the master cylinder has been disassembled or if the reservoir becomes empty, bleed the air from the master cylinder

Trang 6

BRAKE

BRAKE PEDAL SUPPORT

COMPONENTS

COMBINATION METER ASSEMBLY

INSTRUMENT CLUSTER FINISH PANEL

INSTRUMENT PANEL FINISH PANEL END LH

INSTRUMENT PANEL FINISH PANEL END RH

for Hatchback:

E107796E03

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BRAKE – BRAKE PEDAL SUPPORT BR–19

BR

REMOVAL

TERMINAL

FINISH PANEL (for Sedan) (See page ME-138 )

LH

Hatchback: (See page IP-19)

Sedan: (See page IP-5)

RH

Hatchback: (See page IP-19)

Sedan: (See page IP-5)

Hatchback: (See page IP-19)

Sedan: (See page IP-5)

Hatchback: (See page IP-19)

Sedan: (See page IP-5)

WEATHERSTRIP RH

Hatchback: (See page IP-19)

Sedan: (See page IP-5)

WEATHERSTRIP LH

Hatchback: (See page IP-19)

Sedan: (See page IP-5)

Hatchback: (See page IP-19)

Sedan: (See page IP-5)

10 REMOVE FRONT PILLAR GARNISH LH

Hatchback: (See page IP-19)

Sedan: (See page IP-5)

11 REMOVE NO 1 SWITCH HOLE BASE (for Hatchback)

(See page IP-20 )

12 REMOVE GLOVE COMPARTMENT DOOR

ASSEMBLY

Hatchback: (See page IP-20)

Sedan: (See page IP-6)

13 REMOVE UPPER INSTRUMENT PANEL

SUB-ASSEMBLY

Hatchback: (See page IP-21)

Sedan: (See page IP-6)

14 REMOVE INSTRUMENT PANEL UNDER COVER

SUB-ASSEMBLY

Hatchback: (See page IP-67)

Sedan: (See page IP-44)

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INSTALLATION

(a) Install the brake pedal pad onto the brake pedal

(a) Apply lithium soap base glycol grease to the 2 bushes

(b) Install the 2 bushes onto the brake pedal

(a) Install the brake pedal onto the pedal support with the brake pedal shaft and nut

Torque: 37 N*m (375 kgf*cm, 27 ft.*lbf)

(a) Install the pedal support with the bolt and 4 nuts

Torque: Bolt

24 N*m (241 kgf*cm, 17 ft.*lbf) Nut

Trang 9

BRAKE – BRAKE MASTER CYLINDER BR–25

BATTERY CLAMP SUB-ASSEMBLY

Trang 10

Manual Transaxle)

(a) Slide the clip and disconnect the reservoir tube

NOTICE:

Remove the brake master cylinder after depressing the brake pedal several times and bleeding the vacuum pressure from inside the brake booster.

(a) Disconnect the brake fluid level warning switch connector

Trang 11

BRAKE – BRAKE MASTER CYLINDER BR–31

BR

INSPECTION

(a) Check the inside of the master cylinder body for scratch

If scratched, replace the brake master cylinder assembly with a new one

Trang 12

Standard Clearance:

-0.21 to 0 mm (-0.0083 to 0 in.)

If there is clearance between the SST main body and the shell of the brake booster, the push rod is protruding too far If the chalk does not stick to the tip of the brake booster push rod, the push rod protrusion is insufficient

(c) If the clearance is not within the standard, adjust the length by holding the rod using SST and turning the tip of the rod using a 7 mm socket driver

NOTICE:

Check the push rod clearance again after adjusting.

(a) Install a new O-ring onto the brake master cylinder

SST

G028332E02

SST

F047969E04

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BR–34 BRAKE – BRAKE BOOSTER

FRONT WIPER ARM HEAD CAP

FRONT WIPER ARM AND BLADE ASSEMBLY LH

FRONT WIPER ARM AND BLADE ASSEMBLY RH

HOOD TO COWL TOP SEAL

COWL TO REGISTER DUCT SUB-ASSEMBLY

OUTER COWL TOP PANEL

C116866E10

Trang 14

Immediately wash off any brake fluid that comes into

contact with any painted surfaces.

Hatchback: (See page WW-17)

Sedan: (See page WW-9)

ASSEMBLY LH

Hatchback: (See page WW-17)

Sedan: (See page WW-9)

ASSEMBLY RH

Hatchback: (See page WW-17)

Sedan: (See page WW-9)

Hatchback) (See page WW-18 )

LH (for Sedan) (See page WW-10 )

RH (for Sedan) (See page WW-10 )

SUB-ASSEMBLY

Hatchback: (See page WW-18)

Sedan: (See page WW-10)

10 REMOVE COWL TOP VENTILATOR LOUVER LH (for

Hatchback) (See page WW-18 )

11 REMOVE FRONT WIPER MOTOR AND LINK

Hatchback: (See page WW-19)

Sedan: (See page WW-10)

12 REMOVE COWL TO REGISTER DUCT

SUB-ASSEMBLY (for Hatchback) (See page EM-122 )

13 REMOVE FRONT AIR SHUTTER SEAL (for Sedan)

(See page EM-123 )

14 REMOVE OUTER COWL TOP PANEL

Hatchback: (See page EM-123)

Sedan: (See page EM-123)

15 REMOVE INSTRUMENT PANEL UNDER COVER

SUB-ASSEMBLY

Hatchback: (See page IP-67)

Sedan: (See page IP-44)

16 REMOVE LOWER INSTRUMENT PANEL FINISH

PANEL SUB-ASSEMBLY

Hatchback: (See page IP-69)

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BRAKE – FRONT BRAKE BR–47

34 (347, 25)

CYLINDER BOOT

DISC BRAKE CYLINDER ASSEMBLY

FRONT DISC

FRONT DISC

BRAKE BLEEDER

PLUG

FRONT DISC BRAKE

BLEEDER PLUG CAP

FRONT DISC BRAKE CYLINDER MOUNTING

FRONT DISC BRAKE CYLINDER SLIDE BUSH

FRONT DISC BRAKE

CYLINDER SLIDE PIN

FRONT DISC BRAKE PAD SUPPORT PLATE

FRONT DISC BRAKE PISTON

FRONT FLEXIBLE HOSE

PISTON SEAL

FRONT FLEXIBLE HOSE UNION BOLT

FRONT DISC BRAKE CYLINDER SLIDE PIN

FRONT DISC BRAKE PAD SUPPORT PLATE x2

FRONT DISC BRAKE PISTON SET RING

NO 1 ANTI SQUEAL SHIM

NO 2 ANTI SQUEAL SHIM

NO 2 ANTI SQUEAL SHIM

NO 1 ANTI SQUEAL SHIM

8.3 (85, 73 in.*lbf)

N*m (kgf*cm, ft*lbf) : Specified torque

Non-reusable part Lithium soap base glycol grease Disc brake grease

FRONT DISC BRAKE PAD KIT (PAD ONLY)

NO 1 BUSH DUST BOOT

NO 1 PAD WEAR INDICATOR PLATE

NO 1 BUSH DUST BOOT

C116882E02

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INSPECTION

(a) Check the cylinder bore and piston for rust and scoring

If necessary, replace the disc brake cylinder and piston

(a) Using a ruler, measure the pad lining thickness

Standard thickness:

12.0 mm (0.472 in.) Minimum thickness:

If necessary, replace the disc brake pad support plate

(a) Using a micrometer, measure the disc thickness

Standard thickness:

22.0 mm (0.866 in.) Minimum thickness:

19.0 mm (0.748 in.)

If the disc thickness is less than the minimum, replace the front disc

(a) Check the bearing play in the axial direction and check for the axle hub runout (See page AH-1)

(b) Provisionally fasten the front disc together with the hub nuts

Torque: 103 N*m (1,050 kgf*cm, 76 ft.*lbf)

(c) Using a dial indicator, measure the disc runout 10

mm (0.39 in.) away from the outer edge of the front disc

Maximum disc runout:

0.05 mm (0.0020 in.)

If the runout exceeds the maximum value, change the installation positions of the disc and axle to make the minimum runout If the runout exceeds the maximum even when the installation positions are changed, grind the disc If the disc thickness is less than the minimum, replace the front disc

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BR–56 BRAKE – FRONT BRAKE FLEXIBLE HOSE

Trang 18

N*m (kgf*cm, ft*lbf) :Specified torque Non-reusable part

Lithium soap base glycol grease High temperature grease

REAR BRAKE AUTOMATIC ADJUST LEVER

REAR BRAKE PARKING BRAKE SHOE LEVER SUB-ASSEMBLY

REAR WHEEL BRAKE CYLINDER ASSEMBLY

FRONT BRAKE SHOE

REAR BRAKE SHOE

SHOE HOLD DOWN SPRING CUP C-WASHER

WHEEL CYLINDER BOOT PISTON

WHEEL CYLINDER BOOT

PISTON WHEEL CYLINDER CUP

9.8 (100, 7) 8.3 (85, 73 in.*lbf)

SHOE RETURN SPRING

PARING BRAKE SHOE STRUT SET

* For use with SST

15 (155, 11)

14 (143, 10)

*

C116891E01

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BRAKE – REAR DRUM BRAKE BR–67

BR

INSTALLATION

(a) Provisionally install the 2 hub nuts

(b) Remove the hole plug, and turn the adjuster to expand the shoe until the drum locks

(c) Using a screwdriver, release the adjuster 12 notches

(d) Install the hole plug

BR-10 )

BR-12 )

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BR–70 BRAKE – PROPORTIONING VALVE

C121839E02

Trang 22

• In order to determine the location of the malfunction, be sure to check the conditions from the time the malfunction occurred, through data such as DTC and freeze frame data outputs Record this information before disconnecting any connectors and removing or installing any parts.

• Since the anti-lock brake system may be influenced by malfunctions in other systems, be sure to check for DTCs

in other systems

• Be sure to remove and install the brake actuator and each sensor with the ignition switch off, unless specified in the inspection procedures

• When removing and installing the brake actuator and each sensor, be sure to check that the normal display is output during a test mode inspection and a DTC output inspection after reinstalling all the parts

• If the DTC of the CAN communication line is output, repair the malfunction in the communication line and then troubleshoot the anti-lock brake system

• Since the CAN communication line has its own length and route, it cannot be repaired temporarily with a bypass wire, etc

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BC–6 BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM

BC

SYSTEM DIAGRAM

Speed Sensor (with each wheel)

Stop Light Switch

Brake Actuator

Skid Control ECU

Motor Relay Solenoid Relay

Pump Motor Solenoid

: CAN Communication System

C122525E01

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(1) Operation descriptionThe skid control ECU detects wheel lock conditions by receiving vehicle speed signals from each speed sensor, and sends control signals to the pump motor and solenoid valve to prevent the wheels from locking by controlling the brake fluid pressure of each wheel cylinder.The ABS warning light comes on when the ABS system malfunctions.

: :

ABS Warning Light

CAN Communication System

Each Wheel Cylinder

Brake Fluid Pressure

C115099E02

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BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM BC–11

(a) Check for the output DTC relating to the CAN communication system

HINT:

The ECU of this system is connected to the CAN communication system Therefore, before starting troubleshooting, be sure to check that there is no trouble

in the CAN communication system

Result

B A

CAN COMMUNICATION SYSTEM

Trang 26

(b) Turn the ignition switch on.

(c) Follow the prompts on the intelligent tester to display the DATA LIST and select areas where a momentary interruption should be monitored

HINT:

• A momentary interruption (open circuit) cannot

be detected for 3 seconds after the ignition switch is turned on (initial check)

• If the status remains on the ERROR display, check for continuity between the ECU and the sensors, or between ECUs

• The ERROR display on the intelligent tester remains on for 1 second after the harness signal changes from a momentary interruption (open circuit) to normal condition

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-BRAKE CONTROL – ANTI-LOCK -BRAKE SYSTEM BC–15

• Perform a sensor check in test mode after the speed sensor or sensor rotor has been repaired or replaced

• If the ignition switch is turned from on to ACC or off during test mode, DTCs related to the signal check function will

be erased

• During test mode, the skid control ECU stores all DTCs related to the signal check function, and the DTCs are erased if normality is confirmed Any remaining DTCs are those indicating abnormalities that were found

INTELLIGENT TESTER)

(a) Turn the ignition switch off

(b) Check that the steering wheel is in the ahead position

straight-(c) A/T: Check that the shift lever is in the P position and apply the parking brake

(d) M/T: Check that the shift lever is in neutral and apply the parking brake

(e) Connect the intelligent tester to the DLC3

(f) Turn the ignition switch on

(g) Turn the tester on

(h) Switch the skid control ECU to test mode using the intelligent tester

Select the following menu items: DIAGNOSIS / OBD/MOBD /select vehicle / ABS / SIGNAL CHECK

(i) Check that the ABS warning light blinks as shown in the illustration

HINT:

If the ABS warning light does not blink, perform relevant troubleshooting procedures The relevant troubleshooting procedures are described in the sections listed in the table below

(j) Start the engine

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PROBLEM SYMPTOMS TABLE

If no DTCs are displayed during the DTC check 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

NOTICE:

When replacing the brake actuator or sensor, turn the ignition switch off.

ANTI-LOCK BRAKE SYSTEM

ABS and/or EBD does not operate

1 Check DTC again and make sure that normal system code

5 Check brake actuator using intelligent tester (Check brake actuator operation using active test function.) If abnormal, check hydraulic circuit for leakage.

BC-34

6 If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU).

BC-89

ABS and/or EBD does not operate efficiently

1 Check DTC again and make sure that normal system code

5 Check brake actuator using intelligent tester (Check brake actuator operation using active test function.) If abnormal, check hydraulic circuit for leakage.

BC-34

6 If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU).

BC-89

DTC check cannot be done

1 Check DTC again and make sure that normal system code

3 If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU).

BC-89

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BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM BC–25

The table below indicates which lights come on when there are malfunctions in particular functions

{: Light ON, -: Light OFFHINT:

• The DTCs can be read by connecting SST 18040) between the TC and CG terminals of the DLC3 and observing the blinking pattern of the ABS warning light, or by using an intelligent tester (See page BC-25)

(09843-• This system has a sensor signal check function (See page BC-14)

(a) Release the parking brake lever

HINT:

If the warning lights do not illuminate, confirm whether the bulbs have burned out, and also check for CAN communication system DTCs, since the skid control ECU and combination meter are connected by the CAN communication line

If the warning light remains on, perform the relevant troubleshooting procedures The relevant

troubleshooting procedures are described in the sections listed in the table below

ABS Warning Light:

BRAKE Warning Light:

C115112E02

ABS Warning Light:

BRAKE Warning Light:

C115112E02

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FREEZE FRAME DATA

HINT:

• Whenever a DTC is detected or the ABS operates, the skid control ECU stores the current vehicle (sensor) state as freeze frame data

• The skid control ECU stores the number of times (maximum: 31) the ignition switch has been turned from off to on since the last time the ABS was activated However, if the vehicle was stationary or running at a low speed (4.3 mph [7 km/h] or less), or if

a DTC is detected, the skid control ECU stops counting

• Freeze frame data at the time the ABS operates:

The skid control ECU stores and updates the data whenever the ABS system operates

When the ECU stores data at the time a DTC is detected, the data stored when the ABS operated is erased

• Freeze frame data at the time a DTC is detected:

When the skid control ECU stores data at the time a DTC is detected, no updates are performed until the data is cleared

(a) Connect the intelligent tester to the DLC3

(b) Turn the ignition switch on

(c) Turn the tester on

(d) From the display on the tester, select "FREEZE FRAME DATA"

Max.: 500 ms

OFF: Stop light switch OFF

OFF: Parking brake switch OFF

ABS: ABS activated FAIL: Fail safe mode activated SYS: System prohibited NON: No system activated

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BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM BC–31

troubleshooting is one method of shortening diagnostic time

(a) Connect the intelligent tester to the DLC3

(b) Turn the ignition switch on

(c) Turn the intelligent tester on

(d) Select the following menu items: DIAGNOSIS / OBD / MOBD / select vehicle / ABS / DATA LIST

Intelligent Tester

CAN VIM

DLC3

C115104E01

-FR WHEEL SPD

Wheel speed sensor (FR) reading / min.: 0 mph (0 km/h), max.: 202 mph (326 km/h)

FL WHEEL SPD

Wheel speed sensor (FL) reading / min.: 0 mph (0 km/h), max.: 202 mph (326 km/h)

RR WHEEL SPD

Wheel speed sensor (RR) reading / min.: 0 mph (0 km/h), max.: 202 mph (326 km/h)

RL WHEEL SPD

Wheel speed sensor (RL) reading / min.: 0 mph (0 km/h), max.: 202 mph (326 km/h)

VEHICLE SPD

Maximum speed sensor reading / min.: 0 mph (0 km/h), max.: 202 mph (326 km/h)

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• If a DTC is displayed during the DTC check, check the circuit for the DTC listed in the table below For details of each DTC, refer to the page indicated.

• When 2 or more DTCs are detected, perform circuit inspections one by one until the problem is identified

• All DTCs in the table below are detected in accordance with 1 trip detection logic

DTC chart:

1 Front speed sensor RH

2 Front speed sensor RH circuit

1 Front speed sensor LH

2 Front speed sensor LH circuit

1 Skid control sensor RH

2 Skid control sensor RH circuit

3 Sensor installation

4 Brake actuator (skid control ECU)

BC-44

1 Skid control sensor LH

2 Skid control sensor LH circuit

3 Sensor installation

4 Brake actuator (skid control ECU)

BC-44

1 ABS1/VSC1 fuse

2 Wire harness (+ BM circuit)

3 Brake actuator (skid control ECU)

BC-54

1 ABS1/VSC1 fuse

2 Wire harness (+ BM circuit)

3 Brake actuator (skid control ECU)

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BC–40 BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM

BC

DESCRIPTION

The speed sensors detect the wheel speeds and send appropriate signals to the skid control ECU.Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change

as the rotors turn

The speed sensors detect those magnetic changes and send pulse signals to the skid control ECU The ECU monitors the wheel speeds through these pulse signals to control the ABS control system

Speed Sensor LH

(Test Mode DTC) DTC C1275/75 Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC)

Speed Sensor LH (Test Mode DTC)

Trang 34

DESCRIPTION

Refer to DTC C0200/31 (See page BC-37)

Speed Sensor LH

(Test Mode DTC) DTC C1277/77 Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC)

Speed Sensor LH (Test Mode DTC)

C0210/33

C0215/34

When any of following conditions detected:

1 At vehicle speed of 6 mph (10 km/h) or more, open

or short in sensor signal circuit continues for 1 second or more.

2 Momentary interruption of sensor signal from abnormal wheel occurs 255 times or more.

3 Open in speed sensor signal circuit continues for 0.5 seconds or more.

4 With IG1 terminal voltage 9.5 V or more, sensor power supply voltage decreases for 0.5 seconds or more.

5 When vehicle driven at speed of more than 6 mph (10 km/h), one of wheel speeds below one-seventh

of other wheel speeds for 15 seconds or more.

C1238/38

C1239/39

When either of following conditions detected:

1 At vehicle speed of 12 mph (20 km/h) or more, noise occurs 75 times or more in sensor signal from abnormal wheel in 5 seconds.

2 At vehicle speed of 6 mph (10 km/h) or more, noise input once per rotor rotation for 15 seconds or more.

C1273/73

C1277/77

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BC–54 BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM

BC

DESCRIPTION

This solenoid is turned on in accordance with signals from the skid control ECU and controls the pressure

on the wheel cylinders to control the braking force

Open or short in solenoid circuit continues for 0.05

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DESCRIPTION

The ABS motor relay supplies the power to the ABS pump motor While the ABS is activated, the skid

control ECU switches the motor relay ON and operates the ABS pump motor

C0273/13

When either of following conditions (1 or 2) detected:

1 All of following conditions continue for 0.2 seconds

or more.

(a) IG1 terminal voltage between 9.5 V and 17.2 V.

(b) During initial check or ABS operation.

(c) Relay contact open when relay on.

2 Both of following conditions continue for 0.2 seconds or more.

(a) IG1 terminal voltage 9.5 V or less.

(b) Relay contact remains open when relay on.

seconds or more.

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BC–60 BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM

BC

DESCRIPTION

The solenoid relay supplies power to the ABS solenoid

After the ignition switch is turned on, the vehicle speed has reached 3 mph (5 km/h) and the solenoid is determined to be normal by the initial check self-diagnosis, the relay switches on If any open or short circuits are detected, the relay switches off

These DTCs may be set if the voltage supply to the solenoid relay (+BS) falls below the DTC detection threshold due to the battery or alternator outputs being insufficient

C0278/11

When either of following conditions (1 or 2) detected:

1 Both of following conditions continue for 0.2 seconds or more.

(a) IG1 terminal voltage between 9.5 V and 17.2 V.

(b) Solenoid relay contact open when relay on.

2 Both of following conditions continue for 0.2 seconds or more.

(a) IG1 terminal voltage becomes lower than 9.5 V when relay turned on.

(b) Relay contact remains open.

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DESCRIPTION

When there is an abnormality in the power supply circuit of the brake actuator (skid control ECU), the skid control ECU sets a DTC and the operation is prohibited by the fail-safe function This DTC is set when the voltage supplied to terminal IG1 is outside the DTC detection threshold, due to abnormalities in the battery, power source circuits or charging circuits such as the alternator circuit

The fail-safe function is canceled when the voltage to terminal IG1 returns to normal

WIRING DIAGRAM

DTC C1241/41 Low Battery Positive Voltage or Abnormally High Battery Positive Voltage

C1241/41

When any of following conditions detected:

1 At vehicle speed of 2 mph (3 km/h) or more, IG1 terminal voltage 9.5 V or less for 10 seconds or more.

2 When IG1 terminal voltage below 9.5 V, relay off condition continues for 0.2 seconds or more despite ECU turning motor relay on.

3 When IG1 terminal voltage below 9.5 V, wheel speed sensor power source voltage decreases for

Skid Control ECU IG1

IG1

GND1 GND2

ECU-IG

ALT

Ignition Switch AM1

Battery

C117855E01

Trang 39

BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM BC–67

BC

DESCRIPTION

The skid control ECU detects the brake operating conditions through a signal transmitted by the stop light

switch The skid control ECU incorporates an open circuit detection circuit This DTC is set under either of

the following conditions:

• An open is detected in the stop light signal input line when the stop light switch is off

• An open is detected in the stop light circuit lead to the ground when the stop light switch is off

WIRING DIAGRAM

stop light switch continues for 0.3 seconds or more.

Skid Control ECU

Open Detection Circuit

Stop Light Switch STOP

Rear Combination Light (RH) Rear Combination Light (LH)

Center Stop Light

ALT

STP

Battery

C136888E02

Trang 40

DESCRIPTION

The motor relay (semiconductor relay) is housed in the skid control ECU and drives the pump motor

based on a signal from the skid control ECU

OK:

The battery voltage, power source voltage, and the ground condition of the skid control ECU are normal.

NG OK

(a) Clear the DTC (See page BC-25)

(b) Start the engine

(c) Drive the vehicle at a speed of 4 mph (6 km/h) or more for several seconds

(d) Check if the same DTC is output (See pageBC-25 )

Result

B A

C1251/51

When either of following conditions detected:

1 Actuator pump motor does not operate properly.

2 Open in actuator pump motor circuit continues for

at least 2 seconds.

Brake actuator

REPAIR POWER SOURCE CIRCUIT

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