Page 2951 of 4770
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±531
766 Author: Date:
3 Is DTC output?
Check DTC on page DI±493.
YES Repair circuit indicated by the code output.
NO
4 Does ABS warning light go off if short pin is removed?
NO Check for short circuit in harness and connec-
tor between ABS warning light, DLC1 and ABS
ECU (See page IN±31).
YES
5 Check ABS solenoid relay (See step 2).
NG Replace ABS solenoid relay.
OK
Check for short circuit in harness and connector between DLC1 and ABS solenoid relay
(See page IN±31).
Page 2962 of 4770
DI03W±11
DI±542
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
777 Author: Date:
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Using SST 09843 ±18020, connect the terminals Tc and E1.
If a malfunction code is displayed during the DTC check, check the circuit listed for the code. For details
of each code, turn to the page referred to under the ºSee pageº for respective ºDTC No.º in the DTC
chart.
DTC No.
(See Page)Detection ItemTrouble Area
11
(DI±546)ABS solenoid valve relay faulty
ABS solenoid valve relay
Valve supply voltage
ECU
13
(DI±548)ABS pump motor faulty
ABS motor relay
Pump motor voltage
Pump motor lead disconnected
ECU
21
(DI±550)Right front solenoid valves faultyABS actuator (right front inlet or outlet solenoid valve)
22
(DI±550)Left front solenoid valves faultyABS actuator (left front inlet or outlet solenoid valve)
23
(DI±550)Right rear solenoid valves faultyABS actuator (right rear inlet or outlet solenoid valve)
24
(DI±550)Left rear solenoid valves faultyABS actuator (left rear inlet or outlet solenoid valve)
31
(DI±552)Right front wheel speed sensor signal malfunction
32
(DI±552)Left front wheel speed sensor signal malfunctionRight front, left front, right rear and left rear speed sensor
Each speed sensor circuit
33
(DI±552)Right rear wheel speed sensor signal malfunction
Each s eed sensor circuit
Sensor installation
ECU
34
(DI±552)Left rear wheel speed sensor signal malfunction
35
(DI±552)Open circuit in right front wheel speed sensor circuitRight front, left front speed sensor
Eh d i it36
(DI±552)Open circuit in left front wheel speed sensor circuit
Each speed sensor circuit
ECU
37
(DI±557)Speed sensor rotor is wrong number of teeth on one of the 4
wheelsSpeed sensor
Sensor rotor
ECU
38
(DI±552)Open circuit in right rear wheel speed sensor circuitRight rear, left rear speed sensor
Eh d i it39
(DI±552)Open circuit in left rear wheel speed sensor circuit
Each speed sensor circuit
ECU
41
(DI±558)Low battery positive voltage
Battery
Charging system regulator
Power source circuit
ECU
58
(DI±561)Open circuit in stop light switch circuit
Stop light switch
Stop light switch circuit
ECU
62
(DI±563)Malfunction in ECUECU
Page 2963 of 4770
DI03X±05
F01175
ABS Actuator
(w/ ECU, Relay)Front Speed Sensor
DLC1
DLC2Sensor Rotor
Rear Speed Sensor
Stop Light Switch ABS Warning Light
Sensor Rotor
Front Speed Sensor
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
DI±543
778 Author: Date:
PARTS LOCATION
Page 2966 of 4770
DI040±08
F03949
Actuator Assembly
BatteryActuator Assembly
MAINB±GF4 1 ALT
FL
Block 1F5 B±G3
ABS
12 3
Engine
Room R/B
No.3L
L
18
A6
+B+BA6
Valve Relay
Motor Relay17
A6 16 GND2
W±BEA
W±B
W±B 19
A6GND1 ECU DI±546
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
781 Author: Date:
CIRCUIT INSPECTION
DTC 11 ABS Solenoid Valve Relay Circuit
CIRCUIT DESCRIPTION
This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is
OK, the relay goes on.
DTC No.DTC Detecting ConditionTrouble Area
11
Detection of any conditions from 1. through 3.:
1. 3 or more solenoid valves are shown faulty in response
and simultaneously valve supply voltage is detected
faulty.
2. Solenoid valve relay will not be switched OFF.
3. Valve relay is frozen in spite of its high valve relay sup-
ply voltage.
ABS solenoid valve relay
Valve supply voltage
ECU
Fail safe function:
If trouble occurs in the ABS solenoid valve relay circuit, the ECU cuts off current to the ABS solenoid valve
relay and prohibits ABS control.
WIRING DIAGRAM
Page 2968 of 4770
F03949
Actuator Assembly
BatteryActuator Assembly
MAINB±GF4 1 ALT
FL
Block 1F5 B±G3
ABS
12 3L
L
18
A6
+B+BA6
Valve Relay
Motor Relay17
A6 16 GND2
W±BEA
W±B
W±B 19
A6GND1 ECU Engine
Room R/B
No.3 DI±548
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
783 Author: Date:
DTC 13 Pump Motor Circuit
CIRCUIT DESCRIPTION
The ABS motor relay supplies power to the ABS pump motor. While the ABS is activated, the ECU switches
the ABS motor relay ON and operates the ABS pump motor.
DTC No.DTC Detecting ConditionTrouble Area
13
Detection of any conditions from (1) through (3):
1. After actuation of the motor relay, pump motor voltage
will not be supplied within 0.4 sec.
2. Pump motor voltage is at a high level, motor relay will
not actuate for 2.5 sec. or more.
3. Pump motor voltage keeps low level for longer than 0.4
sec. and the pump repeats activating for 7 sec. 3 times
maximally. since the last activation, the pump motor has
been gone dead because of short circuit.
ABS motor relay
Pump motor voltage
Pump motor lead disconnected
ECU
Fail safe function:
If trouble occurs in the ABS motor relay circuit, the ECU cuts off current to the ABS solenoid relay and prohib-
its ABS control.
WIRING DIAGRAM
DI041±08
Page 2970 of 4770
F03949
Actuator Assembly
BatteryActuator Assembly
MAINB±GF4 1 ALT
FL
Block 1F5 B±G3
ABS
12 3
Engine
Room R/B
No.3L
L
18
A6
+B+BA6
Valve Relay
Motor Relay17
A6 16 GND2
W±BEA
W±B
W±B 19
A6GND1 ECU DI±550
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
785 Author: Date:
DTC 21, 22, 23, 24 ABS Solenoid Valve Circuit
CIRCUIT DESCRIPTION
This solenoid goes on when signals are received from the ECU and controls the pressure acting on the wheel
cylinders thus controlling the braking force.
DTC No.DTC Detecting ConditionTrouble Area
21, 22, 23, 24Solenoid valve signal does not match to the check result.Each solenoid valve
Fail safe function:
If trouble occurs in the actuator solenoid valve circuit, the ECU cuts off current to the ABS solenoid valve
relay and prohibits ABS control.
WIRING DIAGRAM
DI042±08
Page 2972 of 4770
BR3583
BR3582F00010
RotorSpeed Sensor
Magnet
To ECU
+V
±VHigh Speed
Low Speed
CoilNS
DI±552
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
787 Author: Date:
DTC31, 32, 33, 34, 35, 36, 38, 39Speed Sensor Circuit
CIRCUIT DESCRIPTION
The speed sensor detects wheel speed and sends the ap-
propriate signals to the ECU. These signals are used to control
the ABS system. The front and rear rotors each have 48 serra-
tions.
When the rotors rotate, the magnetic field emitted by the perma-
nent magnet in the speed sensor generates an AC voltage.
Since the frequency of this AC voltage changes in direct propor-
tion to the speed of the rotor, the frequency is used by the ECU
to detect the speed of each wheel.
DTC No.DTC Detecting ConditionTrouble Area
31, 32, 33, 34
Detection of any of conditions from 1. through 3.:
1. Vehicle speed is more than 40 km/h (25 mph), pulses
are not input for 0.01 sec.
2. After the initial start or restart and when the vehicle
speed has reached 12 km/h (7 mph), the wheel with 0
km/h (0 mph) of wheel speed is detected.
3. After the initial start or restart and when the vehicle
speed has reached 70 km/h (44 mph), front wheel with 0
km/h (0 mph) of wheel speed is detected.
Right front, left front, right rear, left rear speed sensor
Each speed sensor circuit
Sensor installation
ECU
35, 36, 38, 39Detecting abnormality in the resistance value of each speed
sensor.Right front, left front, right rear, left rear speed sensor
Each speed sensor circuit
ECU
HINT:
DTC No. 31 and 35 are for the right front speed sensor.
DTC No. 32 and 36 are for the left front speed sensor.
DTC No. 33 and 38 are for the right rear speed sensor.
DTC No. 34 and 39 are for the left rear speed sensor.
Fail safe function:
If trouble occurs in the speed sensor circuit, the ECU cuts off current to the ABS solenoid valve relay and
prohibits ABS control.
DI043±04
Page 2978 of 4770
F03950
Actuator Assembly LB±R
IG1Actuator Assembly LB±R
IG1Actuator Assembly LB±R
IG1Actuator Assembly LB±R
IG1Actuator Assembly L
IG1
BatteryMAINB±G1
F4 ALTFL
Block 1F5 B±G3
ABS
12
Engine
Room R/B
No.3 3L
18
A617
A6
+B+B
Valve Relay
Motor Relay
GND2
A6
1615
A65
B±R
IK3B±R
C
C
J12 J/C
ECU
GND119
A6W±B
W±B
W±B
EAECU±IG
Instrument
Panel J/B 1J
9 DI±558
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
793 Author: Date:
DTC 41 Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the actuators.
DTC No.DTC Detecting ConditionTrouble Area
41
Vehicle speed at about 6 km/h (4 mph), low battery voltage
is less than 9.4 V at the time of non±operation of ABS
control or less than 8.8 V at the time of operation of ABS
control, and high battery voltage is more than 17.4 V.Battery
Charging system
Power source circuit
ECU
Fail safe function:
If trouble occurs in the power source circuit, the ECU cuts off current to the ABS solenoid valve relay and
prohibits ABS control.
WIRING DIAGRAM
DI045±08
