TOYOTA CAMRY 1999 Service Repair Manual

F02201
DLC1
TsTc E1
BR3904
0.13 sec. 0.13 sec.
ON
OFF
BR3893
Malfunction Code (Example Code 72, 76)
72 67
ON
OFF
0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.1.5 sec.
2.5 sec.4 sec.
Repeat
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±179
2. SPEED SENSOR SIGNAL
(a) Check the speed sensor signal.
(1) Turn the ignition switch OFF.
(2) Using SST, connect terminals Ts and E
1 of DLC1.
SST 09843 ± 18020
(3) Start the engine.
(4) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit (See page DI±213).
(5) Drive vehicle straight forward.
HINT:
Drive vehicle faster than 45 km/h (28 mph) for several seconds.
(6) Stop the vehicle.
(7) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843 ± 18020
(8) Read the number of blinks of the ABS warning light.
HINT:

See the list of DTC shown on the next page.

If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).

If 2 or more malfunctions are indicated at the same time,
the lowest numbered code will be displayed 1st.
(9) After doing the check, disconnect the SST from ter-
minals Ts and E
1, Tc and E1 of DLC1, and turn igni-
tion switch OFF.
SST 09843 ± 18020

H07517
TOYOTA
Hand±held Tester
DLC2
DI±180
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
(b) Using TOYOTA hand±held tester, check the DTC.
(1) Do step 1. ± 6. on the previous page.
(2) Hook up the TOYOTA hand±held tester to the
DLC2.
(3) Read the DTC by following the prompts on the tes-
ter screen.
Please refer to the TOYOTA hand±held tester oper-
ator 's manual for further details.
DTC of speed sensor check function:
Code No.DiagnosisTrouble Area
71Low output voltage of right front speed sensor

Right front speed sensor

Sensor installation

Right front speed sensor rotor
72Low output voltage of left front speed sensor

Left front speed sensor

Sensor installation

Left front speed sensor rotor
73Low output voltage of right rear speed sensor

Right rear speed sensor

Sensor installation

Right rear speed sensor rotor
74Low output voltage of left rear speed sensor

Left rear speed sensor

Sensor installation

Left rear speed sensor rotor
75Abnormal change in output voltage of right front speed sen-
sor
Right front speed sensor rotor
76Abnormal change in output voltage of left front speed
sensor
Left front speed sensor rotor
77Abnormal change in output voltage of right rear speed
sensor
Right rear speed sensor rotor
78Abnormal change in output voltage of left rear speed sensor
Left rear speed sensor rotor

DI03D±04
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±181
DIAGNOSTIC TROUBLE CODE CHART
HINT:

Using SST 09843 ±18020, connect the terminals Tc and E1, and remove the short pin.

If any abnormality is not found when inspection parts, inspect the ECU.

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±186)Open circuit in ABS solenoid relay circuit
ABS solenoid relay
12
(DI±186)Short circuit in ABS solenoid relay circuit

ABS solenoid relay

ABS solenoid relay circuit
13
(DI±191)Open circuit in ABS motor relay circuit
ABS motor relay
14
(DI±191)Short circuit in ABS motor relay circuit

ABS motor relay

ABS motor relay circuit
21
(DI±195)Open or short circuit in 2±position solenoid circuit for right front
wheel
ABS actuator

SFRR or SFRH circuit
22
(DI±195)Open or short circuit in 2±position solenoid circuit for left front
wheel
ABS actuator

SFLR or SFLH circuit
23
(DI±195)Open or short circuit in 2±position solenoid circuit for right rear
wheel
ABS actuator

SRRR or SRRH circuit
24
(DI±195)Open or short circuit in 2±position solenoid circuit for left rear
wheel
ABS actuator

SRLR or SRLH circuit
31
(DI±198)Right front wheel speed sensor signal malfunction
32
(DI±198)Left front wheel speed sensor signal malfunction
Right front, left front, right rear and left rear speed sensor
Eh d i it33
(DI±198)Right rear wheel speed sensor signal malfunction

Each speed sensor circuit

Speed sensor rotor
34
(DI±198)Left rear wheel speed sensor signal malfunction
33, 34
(DI±203)Rear speed sensor rotor faulty

Rear axle hub

Right rear, left rear speed sensor

Rear speed sensor circuit
41
(DI±204)Power source voltage down

Battery

Charging system

Power source circuit
49
(DI±207)Open circuit in stop light switch circuit
Stop light switch

Stop light switch circuit
51
(DI±209)Pump motor is locked
ABS pump motor
Always ON
(DI±211)Malfunction in ECU
ECU

Battery

DI03E±04
F01172
Sensor Rotor
ABS Warning Light
ABS ECU
DLC 1
Front Speed Sensor
ABS Actuator
ABS Solenoid
Relay
ABS Motor Relay
Sensor RotorFront Speed
Sensor
Stop Light SwitchDLC 2
Rear Speed Sensor DI±182
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
PARTS LOCATION

DI1JL±03
F07155
A13
A14
1 2 3 4 856 7 9 10 11 12 13
14 15 16 17 18 19 20 21 22 1 2 3 4 5 6
7 8 9 10 11 1223 24 25 26
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±183
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
IG1 (A14 ± 13) ± GND (A14 ±
12, 25)B±R e W±BIG switch ON10 ± 14
R+ (A14 ± 26) ± SR (A13 ± 7)GR±R eGRIG switch ON, ABS warning light OFF9 ± 14
R+ (A14 ± 26) ± MR (A13 ± 1)GR±R eGR±LIG switch ONBelow 1.0
SFRR (A14 ± 1) ± GND (A14 ±
12, 25)W±R e W±BIG switch ON, ABS warning light OFF10 ± 14
SFRH (A14 ± 2) ± GND (A14 ±
12, 25)R±B e W±BIG switch ON, ABS warning light OFF10 ± 14
SFLR (A13 ± 6) ± GND (A14 ±
12, 25)W±L e W±BIG switch ON, ABS warning light OFF10 ± 14
SFLH (A13 ± 5) ± GND (A14 ±
12, 25)L±B e W±BIG switch ON, ABS warning light OFF10 ± 14
SRRR (A13 ± 12) ± GND (A14
± 12, 25)R±G e W±BIG switch ON, ABS warning light OFF10 ± 14
SRRH (A13 ± 11) ± GND (A14
± 12, 25)W±R e W±BIG switch ON, ABS warning light OFF10 ± 14
SRLR (A14 ± 14) ± GND (A14 ±
12, 25)LG±B e W±BIG switch ON, ABS warning light OFF10 ± 14
SRLH (A14 ± 15) ± GND (A14 ±
12, 25)G±Y e W±BIG switch ON, ABS warning light OFF10 ± 14
WA (A14 ± 11) ± GND (A14 ±GBWBIG switch ON, ABS warning light ONBelow 2.0WA (A14 11 ) GND (A14
12, 25)G±B e W±BIG switch ON, ABS warning light OFF10 ± 14
STP (A14 ± 5) ± GND (A14 ±GWWBStop light switch OFFBelow 1.5STP (A14 5) GND (A14
12, 25)G±W e W±BStop light switch ON8 ± 14
D/G (A14 ± 24) ± GND (A14 ±
12, 25)R±L e W±BIG switch ON, ABS warning light OFF10 ± 14
Tc (A14 ± 8) ± GND (A14 ± 12,
25)LG±R e W±BIG switch ON8 ± 14
Ts (A14 ± 21) ± GND (A14 ± 12,
25)R±Y e W±BIG switch ON8 ± 14
FR+ (A13 ± 3) ± FR± (A13 ± 9)W e BIG switch ON, slowly turn right front wheelAC generation
FL+ (A13 ± 8) ± FL± (A13 ± 2)R e GIG switch ON, slowly turn left front wheelAC generation
RR+ (A14 ± 10) ± RR± (A14 ±
23)W eBIG switch ON, slowly turn right rear wheelAC generation

DI±184
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
RL+ (A14 ± 22) ± RL± (A14 ± 9)
R e GIG switch ON, slowly turn left rear wheelAC generation
MT (A13 ± 10) ± GND (A13 ±
12, 25)R±W e W±BIG switch ONBelow 1.5

DI03G±05
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±185
PROBLEM SYMPTOMS TABLE
If a normal code is 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.
SymptomSuspect AreaSee page
ABS does not operate
Only when 1. to 4. are all normal and the problem is still
occurring, replace the ABS ECU.
2. Check the DTC reconfirming that the normal code is
output.
3. IG power source circuit.
4. Speed sensor circuit.
5. Check the ABS actuator with a checker.
If abnormal, check the hydraulic circuit for leakage
(See page *DI±536).
DI±177
DI±204
DI±198
*BR±50
ABS does not operate efficiently
Only when 1. to 4. are all normal and the problem is still
occurring, replace the ABS ECU.
1. Check the DTC reconfirming that the normal code is
output.
2. Speed sensor circuit
3. Stop light switch circuit
4. Check the ABS actuator with a checker.
If abnormal, check the hydraulic circuit for leakage
(See page *DI±536).
DI±177
DI±198
DI±207
*BR±50
ABS warning light abnormal1. ABS warning light circuit
2. ABS ECUDI±213
DI±211
DTC check cannot be done
Only when 1. and 2. are all normal and the problem is still
occurring, replace the ABS ECU.
1. ABS warning light circuit
2. Tc terminal circuit
DI±213
DI±216
Speed sensor signal check cannot be done1. Ts terminal circuit
2. ABS ECUDI±218
DI±211
*See Pub. No. RM654U

DI03H±04
DI±186
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
CIRCUIT INSPECTION
DTC 11, 12 ABS Solenoid 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
Condition 1. or 2. continues for 0.2 sec. or more:
1. IG1 terminal voltage of ABS ECU is 9.5 ± 18.5 V, and
when the solenoid relay is ON.*
1
2. With solenoid relay ON driving, when IG1 terminal of
ABS ECU is less than 9.5 V.*1

ABS solenoid relay

ABS solenoid relay circuit

ECU
12Immediately after IG switch has been turned ON, when the
solenoid relay is OFF.*2

ECU
*1 Solenoid relay contact OFF condition:
All of solenoid terminal voltage is half of IG1 terminal voltage or less than.
*
2
Solenoid relay contact ON condition:
All of solenoid terminal voltage is half of IG 1 terminal voltage or more.
Fail safe function:
If trouble occurs in the ABS solenoid relay circuit, the ECU cuts off current to the ABS solenoid relay and
prohibits ABS control.

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
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±187
WIRING DIAGRAM

F00048
12 (+) (±)
Engine Room
R/B No. 3
3
45 6 12 (+) (±)
Engine Room
R/B No. 3
3
45 6 12 (+) (±)
Engine Room
R/B No. 3
3
45 612 (+) (±)
Engine Room
R/B No. 3
3
45 6
F07153
3
4
ABS
Actuator
ABS
Solenoid
Relay
A4
A13
ECUA5
1234
56781
5 2
6 3
7 4
8
SFRH
SFRR
SRLR
SRLH
SFLH
SFLR
SRRH
SRRR
DI±188
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
INSPECTION PROCEDURE
1 Check voltage between terminals 1 and 2 of Engine Room R/B No. 3 (for ABS so-
lenoid relay).
PREPARATION:
Remove ABS solenoid relay from Engine Room R/B No. 3.
CHECK:
Measure the voltage between terminals 1 and 2 of Engine
Room R/B No. 3 (for ABS solenoid relay).
OK:
Voltage: 10 ± 14 V
NG Check and repair harness or connector.
OK
2 Check continuity between terminal 3 of ABS solenoid relay and terminal SRLR,
SRLH, SRRR, SRRH, SFLR, SFLH, SFRR or SFRH of ABS ECU.
CHECK:
Check continuity between terminal 3 of Engine Room R/B No.3
(for ABS solenoid relay) and terminal SRLR, SRLH, SRRR,
SRRH, SFLR, SRLH, SFRR or SFRH of ABS ECU.
OK:
Continuity
HINT:
Resistance of each solenoid coil
SRLR, SRRR, SFLR, SFRR: 4.3 W
SRLH, SRRH, SFLH, SFRH: 8.8 W
NG Repair or replace harness or ABS actuator.
OK