instrument panel TOYOTA CAMRY 1999 Service Owners Manual

F00073
ECU±IGECU±IG
Instrument
Panel J/BECU±IG
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±521
756 Author: Date:
INSPECTION PROCEDURE
1 Check ECU±IG fuse.
PREPARATION:
Remove ECU±IG fuse from Instrument Panel J/B.
CHECK:
Check continuity of ECU±IG fuse.
OK:
Continuity
NG Check for short circuit in all the harness and
components connected to ECU±IG fuse (See at-
tached wiring diagram).
OK
2 Check battery positive voltage.
OK:
Voltage: 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

F00124
Battery MAIN B±GF4 F91
ALT FL Block
B±R STOP Instrument Panel J/B
1C1B4
7Stop Light
Switch
2G±W
1R 1S5J27 J28J/C
Light Failure
Sensor
J/C
J40
BL
BP W±BG±W
A195
STPABS ECU
R
G±R
High
Mounted
Stop
LightRight
Stop
LightLeft
Stop
Light
A 1Instrument
Panel J/B
G±R W
11R
2 4
G±W
G±R
W±B
W±B
W±B AAC
W±B W±BH10 R11
R9
H10R9
R11 2
122
5 5 G±W
1
2 7
Under the
Left Center
PillarBack Panel
Center
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±523
758 Author: Date:
DTC 49 Stop Light Switch Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
49
ABS ECU terminal IG1 voltage is 9.5 V to 18.5 V and ABS
is in non±operation, the open circuit of the stop light switch
circuit continues for 0.3 sec. or more.
Stop light switch

Stop light switch circuit
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check operation of stop light.
CHECK:
Check that stop light lights up when brake pedal is depressed and turns off when brake pedal is released.
NG Repair stop light circuit (See page BE±37).
OK
DI03N±03

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

F03950
Actuator Assembly LB±R
IG1Actuator Assembly LB±R
IG1Actuator Assembly LB±R
IG1Actuator Assembly LB±R
IG1Actuator Assembly L
IG1
BatteryMAINB±G1
F4 ALTFL
Block 1F5 B±G3
ABS
12
Engine
Room R/B
No.3 3L
18
A617
A6
+B+B
Valve Relay
Motor Relay
GND2
A6
1615
A65
B±R
IK3B±R
C
C
J12 J/C
ECU
GND119
A6W±B
W±B
W±B
EAECU±IG
Instrument
Panel J/B 1J
9 DI±558
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
793 Author: Date:
DTC 41 Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the actuators.
DTC No.DTC Detecting ConditionTrouble Area
41
Vehicle speed at about 6 km/h (4 mph), low battery voltage
is less than 9.4 V at the time of non±operation of ABS
control or less than 8.8 V at the time of operation of ABS
control, and high battery voltage is more than 17.4 V.
Battery

Charging system

Power source circuit

ECU
Fail safe function:
If trouble occurs in the power source circuit, the ECU cuts off current to the ABS solenoid valve relay and
prohibits ABS control.
WIRING DIAGRAM
DI045±08

F00073
ECU±IG
Instrument
Panel J/BECU±IG
Instrument
Panel J/BECU±IG
Instrument
Panel J/B
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
DI±559
794 Author: Date:
INSPECTION PROCEDURE
1 Check ECU±IG fuse.
PREPARATION:
Remove ECU±IG fuse from Instrument Panel J/B.
CHECK:
Check continuity of ECU±IG fuse.
OK:
Continuity
NG Check for short circuit in all the harness and
components connected to ECU±IG fuse (See
the attached wiring diagram.)
OK
2 Check battery positive voltage.
OK:
Voltage: 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

F00125
MAIN
Battery ALT F4B±R
F91B
1C
STOP
B±G4
1 Instrument Panel J/B
FL Block
1 7 WA6
21S 5IK3 J28
G±WECU
J27
1RSTP
Stop Light SwitchJ/C
7
G±R
H10Light Failure
Sensor R
W±B A
R9 R11 C14
BP BL 11R
2
4
G±W G±W G±WG±W 1
Instrument
Panel J/B
2 1
G±RG±R
W±B W±B
W±B H10R9
R11
J/C
A A High
Mounted
Stop
LightRight
Stop
LightLeft
Stop
Light
J405 2
12
2
5
W±B
W±B
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
DI±561
796 Author: Date:
DTC 58 Stop Light Switch Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
49
Stop light switch circuit is open, and stop light switch
voltage is in the level between 65 % or more and less
than 93 % of the battery voltage.
Stop light switch

Stop light switch circuit

ECU
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check operation of stop light.
CHECK:
Check that stop light lights up when brake pedal is depressed and turns off when brake pedal is released.
NG Repair stop light circuit (See page BE±36).
OK
DI046±09

F00096
J/C
J4 D
ABS 7
C
R±LC10
1D
GAUGE
A6 4
DLC2ECU
Instrument
Panel J/BABS
Warning
Light
210
IG312
C10
DR±L R±L
WA 21
14 R±LJ/C
J29
C
C R±L
R±LR±L
IK3
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (BOSCH Made)
DI±565
800 Author: Date:
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU detects any 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 2
1 Check ABS warning light.
See combination meter troubleshooting on page BE±2.
NG Repair bulb or combination meter assembly.
OK
Check for open circuit in harness and connector between GAUGE fuse, DLC2 and ABS ECU
(See page IN±31).
DI048±08

F00175
Battery MAIN FL Block
B±G 1K2Ignition
Switch
Instrument Panel J/B
1B
F4 F91A16
GND3
B±R
1Instrument Panel J/B
1
A15 B±YJ/C
4B±R
CABS & TRAC ECU
9
A17 1JJ12
IG1
W±B W
GND1
GND2 21K1
CB±R
A17 W±B
W±B
EA8
15
109
W±B
W±B
Battery MAIN FL Block
B±G 1K2Ignition
Switch
Instrument Panel J/B
1B
F4 F91A16
GND3
B±R
1Instrument Panel J/B
1
A15 B±YJ/C
4B±R
CABS & TRAC ECU
9
A17 1JJ12
IG1
W±B W
GND1
GND2 21K1
CB±R
A17 W±B
W±B
EA8
15
109
W±B
W±B
Battery MAIN FL Block
B±G 1K2Ignition
Switch
Instrument Panel J/B
1B
F4 F91A16
GND3
B±R
1Instrument Panel J/B
1
A15 B±YJ/C
4B±R
CABS & TRAC ECU
9
A17 1JJ12
IG1
W±B W
GND1
GND2 21K1
CB±R
A17 W±B
W±B
EA8
15
109
W±B
W±B
Battery MAIN FL Block
B±G 1K2Ignition
Switch
Instrument Panel J/B
1B
F4 F91A16
GND3
B±R
1Instrument Panel J/B
1
A15 B±YJ/C
4B±R
CABS & TRAC ECU
9
A17 1JJ12
IG1
W±B W
GND1
GND2 21K1
CB±R
A17 W±B
W±B
EA8
15
109
W±B
W±BBattery MAIN FL Block
ALT
B±GAM1 1K2Ignition
Switch
Instrument Panel J/B
1B
F4 F91A16
GND3
B±R
1Instrument Panel J/B
1
A15 B±YJ/C
ECU±IG 4B±R
CABS & TRAC ECU
9
A17 1JJ12
IG1
W±B W
GND1
GND2 21K1
CB±R
A17 W±B
W±B
EA8
15
109
W±B
W±B DI±598
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
833 Author: Date:
DTC 41 IG Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the actuators.
DTC No.DTC Detecting ConditionTrouble Area
41
Detection of any conditions from 1. through 3.:
1. Vehicle speed is 3 km/h (1.9 mph) or more and battery
voltage is less than 9.5 V continues for 10 sec. or more.
2. Battery voltage has never exceeded more than 17.0 V
and has become less than 9.5 V within 2.16 sec., under
malfunction of solenoid relay monitor after the solenoid
relay is ON, at ECU AST terminal voltage of ECU has
become 8.0 V or more or under malfunction of motor
relay monitor and after the motor relay is ON, motor
relay monitor has become ON.
3. Battery voltage is more than 17.0 V , which continues for
1.2 sec. or more or battery voltage has become more
than 17.0 V within 2.16 sec. and solenoid or motor relay
monitor is under malfunction condition.

Battery

Charging system

Power source circuit

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.
WIRING DIAGRAM
DI04N±04

F00073
ECU±IGECU±IG
Instrument
Panel J/BECU±IG
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
DI±599
834 Author: Date:
INSPECTION PROCEDURE
1 Check ECU±IG fuse.
PREPARATION:
Remove ECU±IG fuse from Instrument Panel J/B.
CHECK:
Check continuity of ECU±IG fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to ECU±IG fuse (See attached
wiring diagram).
OK
2 Check battery positive voltage.
OK:
Voltage: 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

F00124
STOP 7
1C4 W
1R Stop
Light
SwitchJ28
5
2ABS & TRAC ECU
A16
Instrument Panel J/B
F91B
1G±WJ27
1SSTP
F4
ALTB±RJ/C
C
A16
R117
5
BP
R9 W±B
Battery MAIN FL Block
BL
B±G1 11R
42 Instrument
Panel J/BG±W
G±W
G±W
Light
Failure
Sensor
Right
Stop
Light High
Mounted
Stop
Light
J40Left
Stop
Light R
H102 1
H10R11R9
1 22
2
5 W±BW±B
W±B
W±B W±B W±B
W±B J/CA
A DI±604
± DIAGNOSTICSABS & TRACTION CONTROL SYSTEM
839 Author: Date:
DTC 49 Stop Light Switch Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
49
Battery voltage has never exceeded more than 17.0 V and
become less than 9.5 V within 2.16 sec. and the STP
terminal voltage of ECU is under open circuit detecting
limits continues for 3 sec. or more.
Stop light switch

Stop light switch circuit

ECU
WIRING DIAGRAM
DI04Q±04