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 1TIRE AND WHEEL – TIRE AND WHEEL SYSTEM TW–1
Trang 2BRAKE 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 3BR–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 5BR–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 6BRAKE
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
Trang 7BRAKE – 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)
Trang 8INSTALLATION
(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 9BRAKE – BRAKE MASTER CYLINDER BR–25
BATTERY CLAMP SUB-ASSEMBLY
Trang 10Manual 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 11BRAKE – 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 12Standard 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
Trang 13BR–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 14Immediately 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)
Trang 15BRAKE – 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
Trang 16INSPECTION
(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
Trang 17BR–56 BRAKE – FRONT BRAKE FLEXIBLE HOSE
Trang 18N*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
Trang 19BRAKE – 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 )
Trang 21BR–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
Trang 23BC–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
Trang 24(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
Trang 25BRAKE 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
Trang 27-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
Trang 28PROBLEM 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
Trang 29BRAKE 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
Trang 30FREEZE 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
Trang 31BRAKE 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)
Trang 32• 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)
Trang 33BC–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 34DESCRIPTION
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
Trang 35BC–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
Trang 36DESCRIPTION
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.
Trang 37BC–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.
Trang 38DESCRIPTION
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 39BRAKE 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 40DESCRIPTION
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