TOYOTA CAMRY 1999 Service Repair Manual

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

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.

± 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

DI±212
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
4 Check battery positive voltage.
CHECK:
Check the battery positive voltage.
OK:
10 ± 14 V
NG Check and repair the charging system (See Pub.
No. RM654U on page CH±1).
OK
5 Check ABS warning light.
PREPARATION:
(a) Disconnect the connector from the ABS ECU.
(b) Turn the ignition switch ON.
CHECK:
Check the ABS warning light goes off.
OK Check and replace ABS ECU.
NG
Check for short circuit in harness and connector between ABS warning light, DLC1, DLC2, and
ABS ECU (See page IN±29).

F07217
Engine Room R/B No. 3
ABS Solenoid Relay
3
ABS
Actuator
A4 1
2
5 BatteryGAUGE Instrument Panel J/B
J/C
J3
D
ABS ECU 33 3 3
EA34 6
ABS ECUD
IJ28
R±L
IG3 4
DLC1 R±L
G±B
IG3 5 Short
Pin
W±B
ABS ECU W±L
G±B
C
CC R±L
R±L 1D2
7
4
R±L
A14WA IF1 12
11 G±B 4
G±B C12
C12
J/C
J22ABS Warning
Light
23
22 R±L
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±213
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU detects trouble, it lights the ABS warning light while at the same time prohibiting ABS control. At
this time, the ECU records a DTC in memory.
After removing the short pin of the DLC1, connect terminals Tc and E
1 of the DLC1 or DLC2 to make the
ABS warning light blink and output the DTC.
WIRING DIAGRAM
INSPECTION PROCEDURE
Troubleshooting in accordance with the chart below for each trouble symptom.
ABS warning light does not light upGo to step 1
ABS warning light remains onGo to step 3
1 Check ABS warning light.
See combination meter troubleshooting on page See Pub. No. RM654U on page BE±2.
NG Repair bulb or combination meter assembly.
OK
DI03Q±04

F00043
1 2 3
4 5 6
1 2 3
4 5 6
1 2 3
4
65 Open
Continuity
Continuity
Continuity
Open
(+)(±)
(+) (±)1 2 3
4 5 6 Continuity
DI±214
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
2 Check ABS solenoid relay.
PREPARATION:
Remove ABS solenoid relay from Engine Room R/B No. 3.
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
CHECK:
Connect the
test lead to terminal 5 and the  lead to terminal
3. Check continuity between the terminals.
OK:
Continuity
If there is no continuity, connect the  test lead to terminal 5
and the
lead to terminal 3. Recheck continuity between ter-
minals.
NG Replace ABS solenoid relay.
OK
Check for open circuit in harness and connector between DLC1, ABS solenoid relay and body
ground (See page IN±29).

± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±215
3 Is DTC output?
Check DTC on page DI±177.
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±29).
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±29).

F00113
EC
BRTc LG±R
AA A BRIG36
BR
311 DLC1Tc
E
1
Tc E1
LG±RLG±R
IG311 BRC
BJ/C
BRDLC2
34LG±R
BB
BABS ECU
J7 J6
J20
J/C
EC
BRTc 8
LG±R
AA A BR6
BR
311 DLC1Tc
E
1
Tc E1
LG±RLG±R 11 BRC
BJ/C
BRDLC2
34LG±R
BB
BABS ECU
J/C
J2
A14
F02607 F00445F02612
DLC2
DLC1
Tc E
1
Tc E
1
DI±216
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
Tc Terminal Circuit
CIRCUIT DESCRIPTION
Connecting between terminals Tc and E1 of the DLC1 or the DLC2 causes the ECU to display the DTC by
flashing the ABS warning light.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC2 or DLC1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminals Tc and E
1 of DLC2 or
DLC1.
OK:
Voltage: 10 ± 14 V
OK If ABS warning light does not blink even after Tc
and E
1 are connected, the ECU may be defec-
tive.
NG
DI03R±04

± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±217
2 Check for open and short circuit in harness and connector between ABS ECU
and DLC2 or DLC1, DLC2 or DLC1 and body ground (See page IN±29).
NG Repair or replace harness or connector.
OK
Check and replace ABS ECU.

F00172
EC BRA
ABR
3
16 DLC1
Ts E
1
R±Y8
R±Y8
TsABS ECU
J20
J/C
BRA
ABR
3
16 DLC1
Ts E
1
R±Y
IG38
R±Y
A148
TsABS ECU
AB0119S08096
F00446DLC1 DLC1
DLC1
DLC1DLC1
Ts
DLC1 E1
ON
DI±218
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
Ts Terminal Circuit
CIRCUIT DESCRIPTION
The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detected with
the DTC check.
Connecting terminals Ts and E
1 of the DLC1 in the engine compartment starts the check.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Ts and E1 of DLC1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminals Ts and E
1 of DLC1.
OK:
Voltage: 10 ± 14 V
OK If ABS warning light does not blink even after Ts
and E
1 are connected, the ECU may be defec-
tive.
NG
DI03S±04