Page 2346 of 4592
F00044
1 2
3 4
1 2
3 4
1 2
3 4 Open
Continuity
Continuity
(+)(±)
DI±194
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
3 Check ABS motor relay.
CHECK:
Check continuity between each terminal of ABS motor relay.
OK:
Terminals 3 and 4Continuity (Reference value 62 W)
Terminals 1 and 2Open
CHECK:
(a) Apply battery positive voltage between terminals 3 and 4.
(b) Check continuity between terminals of ABS motor relay.
OK:
Terminals 1 and 2Continuity
NG Replace ABS motor relay.
OK
4 Check for open and short circuit in harness and connector between ABS motor
relay and ABS ECU (See page IN±29).
NG Repair or replace harness or connector.
OK
If the same code is still output after the DTC is deleted, check the contact condition of each con-
nection.
If the connections are normal, the ECU may be defective.
Page 2347 of 4592
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±195
DTC 21, 22, 23, 24 ABS Actuator Solenoid 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
Condition 1. or 2. continues for 0.05 sec. or more:
1. IG1 terminal voltage of ABS ECU is 9.5 ± 18.5 V, there
is open or short circuit in actuator solenoid SFRR or
SFRH.
2. IG1 terminal voltage of ABS ECU is 9.5 ± 18.5 V, and
while ABS is control in operation.*
1
ABS actuator
SFRR or SFRH circuit
22
Condition 1. or 2. continues for 0.05 sec. or more:
1. IG1 terminal voltage of ABS ECU is 9.5 ± 18.5 V, there
is open or short circuit in actuator solenoid SFLR or
SFLH.
2. IG1 terminal voltage of ABS ECU is 9.5 ± 18.5 V, and
while ABS is control in operation.*
1
ABS actuator
SFLR or SFLH circuit
23
Condition 1. or 2. continues for 0.05 sec. or more:
1. IG1 terminal voltage of ABS ECU is 9.5 ± 18.5 V, there
is open or short circuit in actuator solenoid SRRR or
SRRH.
2. IG1 terminal voltage of ABS ECU is 9.5 ± 18.5 V, and
while ABS is control in operation.*
1
ABS actuator
SRRR or SRRH circuit
24
Condition 1. or 2. continues for 0.05 sec. or more:
1. IG1 terminal voltage of ABS ECU is 9.5 ± 18.5 V, there
is open or short circuit in actuator solenoid SRLR or
SRLH.
2. IG1 terminal voltage of ABS ECU is 9.5 ± 18.5 V, and
while ABS is control in operation.*
1
ABS actuator
SRLR or SRLH circuit
*1
Solenoid relay contact ON condition:
All of solenoid terminal voltage is half of IG1 terminal voltage or less than.
Fail safe function:
If trouble occurs in the actuator solenoid circuit, the ECU cuts off current to the ABS solenoid relay and pro-
hibits ABS control.
DI03J±04
Page 2348 of 4592
F07147
ABS Solenoid RelayGR±R1
IJ1
GR±RABS ECU
26
A14R+
34
56
33
3
3 1
2 DLC1Engine Room
R/B No.3
GR
7
2ABS
1
3
W±L
B±G
Fusible Link Block
1
F10 F91
B±G
FL Main
Battery ALT
EAW±B4
A4A13 SR
ABS
Actuator
1
A5
A55
A53
7
A5
A5
A5
A5
A54
8
2
6R±B
W±R11
IJ2
IJ212R±B
W±R2
A14
A141
A13
A13
A13
A13
A14
A14 L±B
W±L
W±R
R±G
G±Y
LG±B13
IJ2
IJ255
6
11
12
15
14SFRH
SFRR
SFLH
SFLR
SRRH
SRRR
SRLH
SRLR 3
G±Y
LG±B DI±196
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
WIRING DIAGRAM
Page 2350 of 4592
BR3583
BR3582F00010
RotorSpeed Sensor
Magnet
To ECU
+V
±VHigh Speed
Low Speed
CoilNS
DI±198
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DTC31, 32, 33, 34Speed 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 4.:
1. Vehicle speed is at 10 km/h (6 mph) or more and the
speed sensor signal circuit is open or short circuit con-
tinues for 15 sec. or more.
2. Momentary interruption of the speed sensor signal oc-
curs 7 times or more.
3. Vehicle speed is at 20 km/h (12mph) or more and inter-
ference on the speed sensor signal continues for 5 sec.
or more.
4. Open circuit condition of the speed sensor signal circuit
continues for 0.5 sec. or more.
Right front, left front, right rear, left rear speed sensor
Each speed sensor circuit
Speed sensor rotor
HINT:
DTC No. 31 is for the right front speed sensor.
DTC No. 32 is for the left front speed sensor.
DTC No. 33 is for the right rear speed sensor.
DTC No. 34 is 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 relay and prohibits
ABS control.
DI1JM±03
Page 2356 of 4592
F07156
Ignition
Switch
W24
AM1
IG1
B±YInstrument Panel J/B
19
1K
ECU±IG1JB±RJ/C
J12
C
CB±R13
A14ABS ECU
IG1
Instrument Panel J/B
21
1K
1B
AM1
B±R
FL Block
1
1
F9 F14
ALT
B±G
FL MAIN
Battery
IF A
Instrument
Panel Brace LH J9
Junction
ConnectorW±B
W±B12
A14
A1425GND1
GND2 DI±204
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DTC 41 IG Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the actuators.
DTC No.DTC Detecting ConditionTrouble Area
41
Condition 1. or 2. is detected:
1. Vehicle speed is at 3 km/h (1.9 mph) or more and ECU
terminal IG1 voltage is 9.5 V or less , which continues
for 10 sec. or more.
2. When IG1 terminal voltage is less than 9.5 V, there is
open circuit in the motor relay or in the solenoid relay, or
the solenoid circuit malfunction.
Battery
Charging system
Power source circuit
Fail safe function:
If trouble occurs in the power source circuit, the ECU cuts off current to the ABS solenoid relay and prohibits
ABS control.
WIRING DIAGRAM
DI03M±04
Page 2361 of 4592
F07146
B±G
Fusible
Link
Block
F10 1
F9
1
FL
Main B±G
Battery3
3ABSABS Motor
Relay
2 13
43
3 Engine Room R/B No.3
GR±R GR±R1
IJ126
A14 R+ABS ECU
GR±L1
A13 MR
W±R2
A4
A41
W±B
EAABS Actuator
3
A4R±W10
A13 MT ALT
1
2
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±209
DTC 51 ABS Pump Motor Lock
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
51ABS actuator pump motor is not operating normally.ABS pump motor
Fail safe function:
If trouble occurs in the ABS pump motor, the ECU cuts off current to the ABS solenoid relay and prohibits
ABS control.
WIRING DIAGRAM
DI4KW±02
Page 2362 of 4592
F03291
(±)
(+)12 A4
DI±210
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
INSPECTION PROCEDURE
1 Check operation of ABS & TRAC pump motor.
PREPARATION:
Disconnect the ABS actuator connector.
CHECK:
Connect positive lead to terminal A4±2 and negative lead
to terminal A4 ± 1 of the ABS actuator connector, check that the
pump motor is operates.
OK:
The running sound of the pump motor should be
heard.
OK Check for open circuit in harness and connec-
tor between ABS motor relay, ABS actuator and
ABS ECU (See page IN±29).
NG
Replace ABS actuator.
Page 2363 of 4592
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±211
DTC Always ON ABS ECU Malfunction
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
Always ONABS ECU internal malfunction is detected.ECU
Battery
Fail safe function:
If trouble occurs in the power source circuit, the ECU cuts off current to the ABS solenoid relay and prohibits
ABS control.
INSPECTION PROCEDURE
1 Is DTC output?
Check DTC on page DI±177.
YES Repair circuit indicated by the code output.
NO
2 Is normal code displayed?
YES Check ABS solenoid relay. Check for short cir-
cuit in harness and connector between ABS so-
lenoid relay and DLC1 (See page IN±29).
NO
3 Is ABS warning light go off?
YES Check for open or short circuit in harness and
connector between ECU±IG fuse and ABS ECU
(See page IN±29).
NO
DI03P±05
