TOYOTA CAMRY 1999 Service Repair Manual

F07217
Engine Room R/B No. 3
ABS Solenoid Relay
3
ABS
Actuator
A4 1
2
5 BatteryGAUGE Instrument Panel J/B
J/C
J4
D
ABS ECU 33 3 3
EA34 6
ABS ECUD
IK28
R±L
II3 4
DLC1 R±L
G±B
II3 5 Short
Pin
W±B
ABS ECU W±L
G±B
C
CC R±L
R±L 1D2
7
4
R±L
A19WA IG3 12
11 G±B 4
G±B C10
C10
J/C
J29ABS Warning
Light
23
22 R±L
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±529
764 Author: Date:
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 BE±2.
NG Repair bulb or combination meter assembly.
OK
DI03Q±03

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±530
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
765 Author: Date:
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±31).

± 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).

F00113
A19
EC
BRTc LG±R
AA A BRII36
BR
311 DLC1Tc
E
1
Tc E1
LG±RLG±R
II3 11 BRC
BJ/C
J22: (1MZ±FE)
J23: (5S±FE)BRDLC2
34LG±R
BB
B J3ABS ECU
J8 J7
J/CJ/C
A19
EC
BRTc 8
LG±R
AA A BRII36
BR
311 DLC1Tc
E
1
Tc E1
LG±RLG±R
II3 11 BRC
BJ/C
J22: (1MZ±FE)
J23: (5S±FE)BRDLC2
34LG±R
BB
B J3ABS ECU
J8 J7
J/CJ/C
F02607 F00445F02612
DLC2
DLC1
Tc E
1
Tc E
1
DI±532
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
767 Author: Date:
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±03

± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±533
768 Author: Date:
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±31).
NG Repair or replace harness or connector.
OK
Check and replace ABS ECU.

F00172
J/C
EC BRA
ABR
3
16 DLC1
Ts E
1
R±Y
II38
R±Y
A198
TsABS ECU
J22: (1MZ±FE)
J23: (5S±FE)
J/C
BRA
ABR
3
16 DLC1
Ts E
1
R±Y
II38
R±Y
A198
TsABS ECU
J22: (1MZ±FE)
J23: (5S±FE)
AB0119S08096
F00446DLC1 DLC1
DLC1
DLC1DLC1
Ts
DLC1 E1
ON
DI±534
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
769 Author: Date:
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±03

± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±535
770 Author: Date:
2 Check for open and short circuit in harness and connector between ABS ECU
and DLC1, DLC1 and body ground (See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace ABS ECU.

F00071
DI±536
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
771 Author: Date:
Check for Fluid Leakage
Check for fluid leakage from actuator or hydraulic lines.
DI03T±03

DI051±04
Vehicle Brought to Workshop
Customer Problem Analysis
P. DI±538
Check and Clear DTC (Precheck)
P.
DI±539
Items inside
are titles of pages in this manual,
with the page number in the bottom portion. See
the pages for detailed explanations.
Problem Symptom ConfirmationSymptom Simulation
P. IN±21
Symptom
does not occur
Symptom
occurs
DTC Check
P. DI±539
Sensor CheckCircuit Inspection
P. DI±546 ~ DI±569
DTC Chart
P. DI±542 Malfunction codeProblem Symptoms Table
P. DI±545
Check for Fluid Leakage
P. DI±571
Identification of Problem
Normal code
Repair
Confirmation Test
End
1
2
3
4
5
67
89
10
11
Step 2, 5, 9, 11:Diagnostic steps permitting the use of the
TOYOTA hand±held tester.
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
DI±537
772 Author: Date:
ANTI±LOCK BRAKE SYSTEM (BOSCH Made)
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following pages.

DI03U±04
ABS Check Sheet
Inspector 's
Name:
Customer 's Name
Date Vehicle
Brought InRegistration Year Registration No.
Frame No.
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs/ /
ContinuousIntermittent ( times a day)
Remains ONDoes not Light Up
DTC Check1st Time
2nd TimeNormal Code
Malfunction Code (Code )
Normal CodeMalfunction Code (Code )
Symptomskm
miles
ABS does not operate.
ABS Warning Light
AbnormalABS does not operate intermittently. DI±538
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
773 Author: Date:
CUSTOMER PROBLEM ANALYSIS CHECK