1999 TOYOTA CAMRY warning light

DI1JO±03
R05698
A15 A16A17
1 2 3 4 5 6 7 8 9 10
21 11 12 13
14
15 16 17 18 19
20 22 23 24 25 261 2 3 4 5
4 6 7
8
9 10 11 12 13 14 16 151
2 3 5 6
7 8
9 10 11 12
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI±581
816 Author: Date:
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
IG1 (A16 ± 8) ± GND (A15 ±
15, A17 ± 9, 10)B±R e W±BIG switch ON10 ± 14
R+ (A15 ± 1) ± SR (A15 ± 11)GR±R e GRIG switch ON, ABS warning light OFF9 ± 14
R+ (A15 ± 1) ± MR (A15 ± 24)GR±R e GR±LIG switch ONBelow 1.0
SFRR (A15 ± 26) ± GND (A15
± 15, A17 ± 9, 10)W±R e W±BIG switch ON, ABS warning light OFF10 ± 14
SFRH (A15 ± 13) ± GND (A15
± 15, A17 ± 9, 10)R±B e W±BIG switch ON, ABS warning light OFF10 ± 14
SFLR (A17 ± 1) ± GND (A15 ±
15, A17 ± 9, 10)W±L e W±BIG switch ON, ABS warning light OFF10 ± 14
SFLH (A17 ± 2) ± GND (A15 ±
15, A17 ± 9, 10)L±B e W±BIG switch ON, ABS warning light OFF10 ± 14
SRRR (A17 ± 7) ± GND (A15 ±
15, A17 ± 9, 10)R±G e W±BIG switch ON, ABS warning light OFF10 ± 14
SRRH (A17 ± 8) ± GND (A15 ±
15, A17 ± 9, 10)W±R e W±BIG switch ON, ABS warning light OFF10 ± 14
SRLR (A15 ± 12) ± GND (A15 ±
15, A17 ± 9, 10)LG±B e W±BIG switch ON, ABS warning light OFF10 ± 14
SRLH (A15 ± 25) ± GND (A15 ±
15, A17 ± 9, 10)G±Y e W±BIG switch ON, ABS warning light OFF10 ± 14
AST (A15 ± 10) ± GND (A15 ±
15, A17 ± 9, 10)R e W±BIG switch ON, ABS warning light OFF10 ± 14
WA (A16 ± 4) ± GND (A15 ± 15,GBWBIG switch ON, ABS warning light ONBelow 2.0WA (A16 4) GND (A15 15,
A17 ± 9, 10)G±B e W±BIG switch ON, ABS warning light OFF10 ± 14
STP (A16 ± 16) ± GND (A15 ±GWWBStop light switch OFFBelow 1.5STP (A16 16) GND (A15
15, A17 ± 9, 10)G±W e W±BStop light switch ON8 ± 14
D/G (A15 ± 22) ± GND (A15 ±
15, A17 ± 9, 10)R±L e W±BIG switch ON, ABS warning light ON10 ± 14
Tc (A15 ± 9) ± GND (A15 ± 15,
A17 ± 9, 10)LG±R e W±BIG switch ON8 ± 14
Ts (A15 ± 23) ± GND (A15 ± 15,
A17 ± 9, 10)R±Y eW±BIG switch ON8 ± 14
FR+ (A15 ± 17) ± FR± (A15 ±
18)W e BIG switch ON, slowly turn right front wheelAC generation
FL+ (A15 ± 5) ± FL± (A15 ± 4)R e GIG switch ON, slowly turn left front wheelAC generation
RR+ (A16 ± 9) ± RR± (A16 ±
10)W e BIG switch ON, slowly turn right rear wheelAC generation
RL+ (A16 ± 2) ± RL± (A16 ± 1)R e GIG switch ON, slowly turn left rear wheelAC generation

DI04I±04
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI±583
818 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 & TRAC ECU.
1. Check the DTC reconfirming that the normal code is
output.
2. IG power source circuit
3. Speed sensor circuit
4. Check the ABS & TRAC actuator with a checker. If ab-
normal, check the hydraulic circuit for leakage
(See page DI±623).
DI±574
DI±598
DI±593
BR±61
ABS does not operate efficiently.
Only when 1. to 4. are all normal and the problem is still
occurring, replace the
ABS & TRAC 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 & TRAC actuator with a checker. If ab-
normal, check the hydraulic circuit for leakage
(See page DI±623).
DI±574
DI±593
DI±604
BR±61
ABS warning light abnormal.1. ABS warning light circuit
2. ABS & TRAC ECUDI±612
DI±610
DTC check cannot be done.
Only when 1. and 2. are all normal and the problem is still
occurring, replace the ABS & TRAC ECU.
1. ABS warning light circuit
2. TRAC OFF indicator light circuit
3. Tc terminal circuit
DI±612
DI±617
DI±621
Speed sensor signal check cannot be done.1. Ts terminal circuit
2. ABS & TRAC ECUDI±615
DI±610
TRAC does not operate.
Only when inspection circuits for each problem symptom
are all normal and the problem is still occurring, replace the
ABS & TRAC ECU.
1. Check the DTC, reconfirming that the normal code is
output.
2. IG power source circuit
3. Check the hydraulic circuit for leakage
4. Speed sensor circuit
DI±574
DI±598
DI±623
DI±593
SLIP indicator light abnormal.SLIP indicator light circuitDI±620
TRAC OFF indicator light abnormal.
Only when inspection circuits for each problem symptom
are all normal and the problem is still occurring, replace the
ABS & TRAC ECU.
1. TRAC OFF indicator light circuit
2. TRAC cut switch circuit
DI±617
DI±617

DI±610
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
845 Author: Date:
DTC Always ON ABS & TRAC ECU Malfunction
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
Always ONABS & TRAC ECU internal malfunction is detected.
ECU
Fail safe function:
If any trouble occurs in the power source circuit, the ECU cuts off current to the ABS & TRAC solenoid relay
and prohibits ABS control and TRAC control.
INSPECTION PROCEDURE
1 Is DTC output?
Check DTC on page DI±574.
YES Repair circuit indicated by the code output.
NO
2 Is normal code displayed?
YES Check solenoid relay. Check for short circuit in
harness and connector between solenoid relay
and DLC1 (See page IN±31).
NO
3 Does ABS warning light go off?
YES Check for open and short circuit in harness and
connector between ECU±IG fuse and ABS &
TRAC ECU (See page IN±31).
NO
DI1JQ±03

± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI±611
846 Author: Date:
4 Check battery positive voltage.
CHECK:
Check the battery positive voltage.
OK:
10 ± 14 V
NG Check and repair the charging system
5S±FE engine: (See page CH±1)
1MZ±FE engine: (See page CH±1).
OK
5 Check ABS warning light.
PREPARATION:
(a) Disconnect the connector from the ABS & TRAC ECU.
(b) Turn the ignition switch ON.
CHECK:
Check the ABS warning light goes off.
OK Check and replace ABS & TRAC ECU.
NG
Check for short circuit in harness and connector between ABS warning light, DLC1, DLC2, and
ABS & TRAC ECU (See page IN±31)

F00168
BatteryABS & TRAC
Solenoid Relay Engine Room R/B No. 3
3ABS & TRAC
ECU
A8 1
R±L
C 5 4
IG3 IK2 6
J/C C10
EA4ABS Warning Light 8
12 II3
G±B23 2
22 ABS & TRAC
Actuator
DLC1 Short
Pin
WA
J29 33 3 3
3
W±B4
ABS & TRAC
ECUR±L
4
R±L
II3 5
G±B
C C G±B R±LC107
ABS & TRAC ECU R±LR±L
J/C
D 1D
GAUGE Instrument Panel J/B
A16 J4 D
G±B4 W±L
2
DI±612
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
847 Author: Date:
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU detects a 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.
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
Troubleshoot 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
DI04V±04

DI±614
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
849 Author: Date:
3 Is DTC output?
Check DTC on page DI±574.
YES Repair circuit indicated by the code output.
NO
4 Does ABS warning light go off?
NO Check for short circuit in harness and connec-
tor between ABS warning light, DLC1 and ABS
& TRAC ECU (See page IN±31).
YES
5 Check ABS & TRAC solenoid relay (See step 2).
NG Replace ABS & TRAC solenoid relay.
OK
Check for short circuit in harness and connector between DLC1 and ABS & TRAC solenoid relay
(See page IN±31).

F00095
R±Y
3DLC1
J/CE1
ATs
J2211
II3 IK25
EC BRA15 BR
AR±Y
R±Y23 ABS & TRAC ECU
Ts
R±Y
3DLC1
J/CE1
ATs
J2211
II3 IK25
EC BRA15 BR
AR±Y
R±Y23 ABS & TRAC ECU
Ts
16
AB0119S08096
F00446
Ts
DLC1
E1
ON
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI±615
850 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
DI04X±04

F00114
TRAC OFF
Indicator LightABS & TRAC ECU
CJ32 C10 R±L7
DLC2
17 J/CJ/C
2
IG3
TRC
Instrument Panel J/B
1D
J4 D319
L
A16
D R±L
C10LL
L
A16 TRAC Cut Switch
W±B12
11
LGWT
CSW
J7
J114 1
IGJ8
A 8
1JW±B
A J/C
1J7 Instrument Panel J/B
W±B
A J/CTRAC OFF
Indicator LightABS & TRAC ECU
C
C10 R±L7
DLC2
17 J/CJ/C
2
IG3
TRC
Instrument Panel J/B
1D
J4 D319
L
A16
D R±L
C10LL
L
A16 TRAC Cut Switch
W±B12
11
LGWT
CSW
J7
J114 1
IGJ8
A 8
1JW±B
A J/C
1J7 Instrument Panel J/B
W±B
A J/CTRAC OFF
Indicator LightABS & TRAC ECU
C
C10 R±L7
DLC2
17 J/CJ/C
2
IG3
TRC
Instrument Panel J/B
1D
J4 D319
L
A16
D R±L
C10LL
L
A16 TRAC Cut Switch
W±B12
11
LGWT
CSW
J7
J114 1
IGJ8
A 8
1JW±B
A J/C
1J7 Instrument Panel J/B
W±B
A J/CTRAC OFF
Indicator LightABS & TRAC ECU
C10 R±L7
DLC2
17 J/CJ/C
2
IG3
TRC
Instrument Panel J/B
1D
J4 D319
L
A16
D R±L
C10LL
L
A16 TRAC Cut Switch
W±B12
11
LGWT
CSW
J7
J114 1
IGJ8
A 8
1JW±B
A J/C
1J7 Instrument Panel J/B
W±B
A J/C
TRAC OFF
Indicator LightABS & TRAC ECU
C10
GAUGER±L7
DLC2
17 J/CJ/C
2
IG3
TRC
Instrument Panel J/B
1D
J4 D319
L
A16
D R±L
C10LL
L
A16 TRAC Cut Switch
W±B12
11
LGWT
CSW
J7
J114 1
IGJ8
A 8
1JW±B
A J/C
1J7 Instrument Panel J/B
W±B
A J/CJ32 J32
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI±617
852 Author: Date:
TRAC OFF Indicator, TRAC Cut Switch Circuit
CIRCUIT DESCRIPTION
This is the TRAC control main switch. When the TRAC cut switch is pushed on, TRAC control goes off and
the TRAC OFF indicator lights up. This indicator blinks for warnings when the trouble occurs and for
displaying DTC.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check DTC.
Check DTC on page DI±574.
YES Repair circuit indicated by the code output.
NO
DI04Y±04