ABS TOYOTA CAMRY 1999 Service Manual PDF

DI03C±03
F00047
F00006
DLC1Short Pin
S-17-1 Iei-23-1-A
F00041
DLC2 DLC1
Tc E1
E1Tc
R01346
Normal Code
0.25 sec.
0.25 sec. 2 sec.
ON
OFF
ON
OFF0.5 sec. 0.5 sec.
Code 11 and 21
4 sec.1.5 sec.
2.5 sec.
Code 11 Code 21
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±493
728 Author: Date:
PRE±CHECK
1. DIAGNOSIS SYSTEM
(a) Check the indicator.
When the ignition switch is turned ON, check that the ABS
warning light goes on for 3 seconds.
HINT:
If the indicator check result is not normal, proceed to
troubleshooting for the ABS warning light circuit
(See page DI±529).
(b) Check the DTC.
(1) Disconnect the short pin from DLC1.
(2) Using SST, connect terminals Tc and E
1 of DLC2 or
DLC1.
SST 09843 ± 18020
(3) Turn the ignition switch ON.
(4) Read the DTC from the ABS warning light on the
combination meter.
HINT:

If no code appears, inspect the diagnostic circuit or ABS
warning light circuit (See page DI±532 or DI±529).

As an example, the blinking patterns for normal code and
codes 11 and 21 are shown on the left.
(5) Codes are explained in the code table on page
DI±497.
(6) After completing the check, disconnect terminals Tc
and E
1, and turn off the display.
If 2 or more malfunctions are indicated at the same time the low-
est numbered DTC will be displayed 1st.

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 (DENSO Made)
DI±495
730 Author: Date:
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±529).
(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

DI03D±03
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±497
732 Author: Date:
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±502)Open circuit in ABS solenoid relay circuit
ABS solenoid relay
12
(DI±502)Short circuit in ABS solenoid relay circuit

ABS solenoid relay

ABS solenoid relay circuit
13
(DI±507)Open circuit in ABS motor relay circuit
ABS motor relay
14
(DI±507)Short circuit in ABS motor relay circuit

ABS motor relay

ABS motor relay circuit
21
(DI±511)Open or short circuit in 2±position solenoid circuit for right front
wheel
ABS actuator

SFRR or SFRH circuit
22
(DI±511)Open or short circuit in 2±position solenoid circuit for left front
wheel
ABS actuator

SFLR or SFLH circuit
23
(DI±511)Open or short circuit in 2±position solenoid circuit for right rear
wheel
ABS actuator

SRRR or SRRH circuit
24
(DI±511)Open or short circuit in 2±position solenoid circuit for left rear
wheel
ABS actuator

SRLR or SRLH circuit
31
(DI±514)Right front wheel speed sensor signal malfunction
32
(DI±514)Left front wheel speed sensor signal malfunction
Right front, left front, right rear and left rear speed sensor
Eh d i it33
(DI±514)Right rear wheel speed sensor signal malfunction

Each speed sensor circuit

Speed sensor rotor
34
(DI±514)Left rear wheel speed sensor signal malfunction
33, 34
(DI±519)Rear speed sensor rotor faulty

Rear axle hub

Right rear, left rear speed sensor

Rear speed sensor circuit
41
(DI±520)Power source voltage down

Battery

Charging system

Power source circuit
49
(DI±523)Open circuit in stop light switch circuit
Stop light switch

Stop light switch circuit
51
(DI±525)Pump motor is locked
ABS pump motor
Always ON
(DI±527)Malfunction in ECU
ECU

Battery

DI03E±03
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±498
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
733 Author: Date:
PARTS LOCATION

DI1JL±02
F07155
A18
A19
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 (DENSO Made)
DI±499
734 Author: Date:
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
IG1 (A19 ± 13) ± GND (A19 ±
12, 25)B±R e W±BIG switch ON10 ± 14
R+ (A19 ± 26) ± SR (A18 ± 7)GR±R eGRIG switch ON, ABS warning light OFF9 ± 14
R+ (A19 ± 26) ± MR (A18 ± 1)GR±R eGR±LIG switch ONBelow 1.0
SFRR (A19 ± 1) ± GND (A19 ±
12, 25)W±R e W±BIG switch ON, ABS warning light OFF10 ± 14
SFRH (A19 ± 2) ± GND (A19 ±
12, 25)R±B e W±BIG switch ON, ABS warning light OFF10 ± 14
SFLR (A18 ± 6) ± GND (A19 ±
12, 25)W±L e W±BIG switch ON, ABS warning light OFF10 ± 14
SFLH (A18 ± 5) ± GND (A19 ±
12, 25)L±B e W±BIG switch ON, ABS warning light OFF10 ± 14
SRRR (A18 ± 12) ± GND (A19
± 12, 25)R±G e W±BIG switch ON, ABS warning light OFF10 ± 14
SRRH (A18 ± 11) ± GND (A19
± 12, 25)W±R e W±BIG switch ON, ABS warning light OFF10 ± 14
SRLR (A19 ± 14) ± GND (A19 ±
12, 25)LG±B e W±BIG switch ON, ABS warning light OFF10 ± 14
SRLH (A19 ± 15) ± GND (A19 ±
12, 25)G±Y e W±BIG switch ON, ABS warning light OFF10 ± 14
WA (A19 ± 11) ± GND (A19 ±GBWBIG switch ON, ABS warning light ONBelow 2.0WA (A19 11 ) GND (A19
12, 25)G±B e W±BIG switch ON, ABS warning light OFF10 ± 14
STP (A19 ± 5) ± GND (A19 ±GWWBStop light switch OFFBelow 1.5STP (A19 5) GND (A19
12, 25)G±W e W±BStop light switch ON8 ± 14
D/G (A19 ± 24) ± GND (A19 ±
12, 25)R±L e W±BIG switch ON, ABS warning light OFF10 ± 14
Tc (A19 ± 8) ± GND (A19 ± 12,
25)LG±R e W±BIG switch ON8 ± 14
Ts (A19 ± 21) ± GND (A19 ± 12,
25)R±Y e W±BIG switch ON8 ± 14
FR+ (A18 ± 3) ± FR± (A18 ± 9)W e BIG switch ON, slowly turn right front wheelAC generation
FL+ (A18 ± 8) ± FL± (A18 ± 2)R e GIG switch ON, slowly turn left front wheelAC generation
RR+ (A19 ± 10) ± RR± (A19 ±
23)W eBIG switch ON, slowly turn right rear wheelAC generation

DI03G±04
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±501
736 Author: Date:
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.
13.Check the DTC reconfirming that the normal code is
output.
14.IG power source circuit.
15.Speed sensor circuit.
16.Check the ABS actuator with a checker.
If abnormal, check the hydraulic circuit for leakage
(See page DI±536).
DI±493
DI±520
DI±514
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±493
DI±514
DI±523
BR±50
ABS warning light abnormal1. ABS warning light circuit
2. ABS ECUDI±529
DI±527
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±529
DI±532
Speed sensor signal check cannot be done1. Ts terminal circuit
2. ABS ECUDI±534
DI±527

DI03H±03
DI±502
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
737 Author: Date:
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
IK1
GR±RABS ECU
26
A19R+
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
F5 F41
B±G
FL Main
Battery ALT
EAW±B4
A4A18 SR
ABS
Actuator
1
A5
A55
A53
7
A5
A5
A5
A5
A54
8
2
6R±B
W±R11
IK2
IK212R±B
W±R2
A19
A191
A18
A18
A18
A18
A19
A19 L±B
W±L
W±R
R±G
G±Y
LG±B13
IK2
IK255
6
11
12
15
14SFRH
SFRR
SFLH
SFLR
SRRH
SRRR
SRLH
SRLR 3
G±Y
LG±B
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±503
738 Author: Date:
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
A18
ECUA5
1234
56781
5 2
6 3
7 4
8
SFRH
SFRR
SRLR
SRLH
SFLH
SFLR
SRRH
SRRR
DI±504
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
739 Author: Date:
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

F00042
1 2 3
4 5 6
(+)(±)1 2 3
4 5 6
1 2 3
4 5 6 Open
Continuity
Continuity
Continuity
Open
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±505
740 Author: Date:
3 Check ABS solenoid relay.
CHECK:
Check continuity between each terminal of ABS solenoid relay.
OK:
Terminals 4 and 6Continuity (Reference value 80 W)
Terminals 2 and 3Continuity
Terminals 1 and 3Open
CHECK:
(a) Apply battery positive voltage between terminals 4 and 6.
(b) Check continuity between each terminal of ABS solenoid
relay.
OK:
Terminals 2 and 3Open
Terminals 1 and 3Continuity
NG Replace ABS solenoid relay.
OK