1996 TOYOTA TERCEL Service Repair Manual

R14676
21
R14669
1 2
DI-130
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
1996 TERCEL (RM440U)
INSPECTION PROCEDURE
1 Check speed sensor.
Front:
PREPARATION:
Disconnect the speed sensor connector.
CHECK:
Measure the resistance between terminals 1 and 2 of the speed
sensor connector.
OK:
Resistance: 0.6 - 2.5 kW
CHECK:
Measure the resistance between terminals 1 and 2 of the speed
sensor connector and body ground.
OK:
Resistance: 1 MW or higher
Rear:
PREPARATION:
Disconnect the speed sensor connector.
CHECK:
Measure the resistance between terminals 1 and 2 of the speed
sensor connector.
OK:
Resistance: 0.8 - 1.8 kW
CHECK:
Measure the resistance between terminals 1 and 2 of the speed
sensor connector and body ground.
OK:
Resistance: 1 MW or higher
NG Replace speed sensor.
NOTICE:
Check the speed sensor signal last (See page DI-1 11).
OK
2 Check for open and short in harness and connector between each speed sensor
and ECU (See page IN-26).
NG Repair or replace harness or connector.
OK

R00948
BR4248
BR3795
OK NG
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-131
1996 TERCEL (RM440U)
3 Check sensor rotor and sensor installation.
Front:
PREPARATION:
Remove the drive shaft (See page SA-18).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches or missing teeth.
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.
CHECK:
Check the front speed sensor installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and steering
knuckle.
Rear:
PREPARATION:
Remove the drum (See page SA-39).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches or missing teeth.
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.
CHECK:
Check the rear speed sensor installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and rear axle carri-
er.
NG Replace speed sensor or rotor.
NOTICE:
Check the speed sensor signal last (See page DI-1 11).
OK
Check and replace ABS ECU.

W00706
Battery MAIN FLECU-IG
4
1Ignition Switch
2A12
7
GND
EA21J
1L-R
F6
F7B
B-YB-Y
5 B
IG1
W-B 2 2 1 2
W-B W-G2
1
1B Driver Side J/B
W-G
2Driver Side J/B
1B1K
2
2 B
Junction
Connector
B-Y
W-B W-B
GND A13
A1310 21
Battery MAIN FLECU-IG
4
1Ignition Switch
2A12
7
GND
EA21J
1L-R
F6
F7B
B-YB-Y
5 B
IG1
W-B 2 2 1 2
W-B W-G2
1
1B Driver Side J/B
W-G
2Driver Side J/B
1B1K
2
2 BJunction
Connector
B-Y
W-B W-B
GND A13
A1310 21
Battery MAIN FLECU-IG
4
1Ignition Switch
2A12
7
GND
EA21J
1L-R
F6
F7B
B-YB-Y
5 B
IG1
W-B 2 2 1 2
W-B W-G2
1
1B Driver Side J/B
W-G
2Driver Side J/B
1B1K
2
2 BJunction
Connector
B-Y
W-B W-B
GND A13
A1310 21
Battery MAIN FLECU-IG
4
1Ignition Switch
2A12
7
GND
EA21J
1L-R
F6
F7B
B-YB-Y
5 B
IG1
W-B Fuse
Block
2 1 2
W-B W-G2
1
1B Driver Side J/B
W-G
2Driver Side J/B
1B1K
2
2 BJunction
Connector
B-Y
W-B W-B
GND A13
A1310 21
Battery MAIN FLECU-IG
4
1Ignition Switch
2A12
7
GND
EA21J
1L-R
F6
F7B
B-YB-Y
5 B
IG1
W-B
ALT
B-Y
2 1 2
AM1
W-B W-G2
1
1B Driver Side J/B
W-G
2Driver Side J/B
1B1K
2
2 B
Junction
Connector
B-Y
W-B W-B
GND A13
A1310 21
BH
BG
Engine Room R/BEngine Room R/BABS ECU DI-132
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
1996 TERCEL (RM440U)
DTC 41 IG Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU and, hence the CPU and the actuators.
DTC No.DTC Detecting ConditionTrouble Area
41
Vehicle speed is 3 km/h (1.9 mph) or more and voltage of
ECU terminal IG1 remains at more than 17 V or below 9.5
V for more than 10 sec.
Battery

IC regulator

Open or short in power source circuit

ECU
Fail safe function:
If trouble occurs in the power source circuit, the ECU cuts off current to the ABS control (solenoid) relay and
prohibits ABS control.
WIRING DIAGRAM
DI4R7-03

BE6653R14671F06870
ON
GND
IG1
(-) (+)
F07208
GND (-) (+) LOCK
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-133
1996 TERCEL (RM440U)
INSPECTION PROCEDURE
1 Check battery positive voltage.
OK:
Voltage: 10 - 14 V
NG Check and repair charging system.
OK
2 Check voltage between terminals IG1 and GND of ABS ECU connector.
PREPARATION:
Disconnect the ABS ECU with connectors still connected.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals IG1 and GND of
the ABS ECU connector.
OK:
Voltage: 10 - 14 V
NG Check and repair ABS ECU.
OK
3 Check continuity between terminal GND of ECU connector and body ground.
CHECK:
Measure the resistance between terminal GND of the ABS ECU
connector and body ground.
OK:
Resistance: 1 W or less
OK Repair or replace harness or connector.
NG

N02617
Driver Side J/B
ECU-IG
DI-134
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
1996 TERCEL (RM440U)
4 Check ECU-IG fuse.
PREPARATION:
Remove the ECU-IG fuse from the driver side J/B.
CHECK:
Check the continuity of the ECU-IG fuse.
OK:
Continuity
NG Check for short in all harness and components
connected to ECU-IG fuse (See attached wiring
diagram).
OK
Check for open circuit in harness and con-
nector between ABS ECU and battery (See
page IN-26)

W00704
ABS
EA2 2
DLC1 F71
F63
5
MAIN FL
BatteryEngine Room R/B
L
4
12
21L
A6
A71
2
A7A6
A6
A7 6
2
A6
A71Motor Relay
EB
7
ABS ECU
G-R
L-B
G-B
W-B
W-B
EA
A5
A5A5
A5
A5 12
4
3
5LG
LG-B ABS ECU L-WR+MR
A12
A12
A12
A12SR
AST
MT 4
20
8
26
ABS
EA2 2
F71
ALT
F63
5
MAIN FL
BatteryEngine Room R/B
4
1 B-Y
B2
LA6
A71
2
A7A6
A6
A7 6
A6
A7Solenoid
RelayMotor Relay ABS Control Relay
7
G-R
L-B
G-B W-B
W-B
W-B
W-B W-B
A5
A5A5
A5
A5 12
4
LG
LG-B
ABS ActuatorR+MR
SR
AST
MT 4
20
26 Fuse
BlockA12
B-Y2
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-135
1996 TERCEL (RM440U)
DTC 51 ABS Pump Motor Lock
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
51Pump motor is not operating normally during initial check
ABS pump motor
Fail safe function:
If trouble occurs in the ABS pump motor, the ECU cuts off the current to the ABS control (solenoid) relay and
prohibits ABS control.
WIRING DIAGRAM
DI4LX-02

W03008
Battery MAIN FL
Fuse BlockALT Driver Side J/B
B 1 1
F6 F7 B-R EA2 2B-R1 1
1J 1CSTOP
G-W
BH
12ABS ECU IF12
G-R
21 Stop Light Switch
R-W
IE11
G-W
1E 1
1
1L
1K 5
G-W G-W
Stop Light
W-BA12STP Driver Side J/B
DI-136
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
1996 TERCEL (RM440U)
Stop Light Switch Circuit
CIRCUIT DESCRIPTION
This stop light switch senses whether the brake pedal is depressed or released, and sends the signal to the
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-28)
OK
DI4LY-02

R14666
STP (+) (-)
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-137
1996 TERCEL (RM440U)
2 Check voltage between terminal STP of ABS ECU and body ground.
PREPARATION:
Remove the ABS ECU with connectors still connected.
CHECK:
Measure the voltage between terminal STP of the ABS ECU
and body ground when the brake pedal is depressed.
OK:
Voltage: 8 - 14 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI-1 18).
NG
3 Check for open in harness and connector between ABS ECU and stop light
switch (See page DI-1 18).
NG Repair or replace harness or connector.
OK
Check and replace ABS ECU.