Page 2354 of 4592
R00948
R00947
DI±202
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
5 Check sensor rotor and sensor tip.
Front:
PREPARATION:
Remove the front drive shaft (See page SA±6).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches or missing teeth or foreign objects.
PREPARATION:
Remove the front speed sensor (See Pub. No. RM654U on
page BR±68).
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.
Rear:
PREPARATION:
Remove the axle hub (See Pub. No. RM654U on page SA±52).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches or missing teeth or foreign objects.
PREPARATION:
Remove the rear speed sensor (See Pub. No. RM654U on
page BR±68).
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.
NG Replace sensor rotor or speed sensor.
NOTICE:
Check the speed sensor signal last (See page DI±177).
OK
Check and replace ABS ECU.
Page 2355 of 4592
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±203
DTC 33, 34 Rear Speed Sensor Rotor Faulty
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
33, 34
The condition that the both rear side wheels' speed is
lower than the front wheels' speed at 20 km/h (12 mph) or
more for 20 sec. or more when the IG switch turns ON
and OFF , which is repeated in a sequence more than 8
times.
Rear axle hub
Right rear, left rear speed sensor
Rear speed sensor circuit
INSPECTION PROCEDURE
1 Check rear axle hub (See Pub. No. RM654U on page SA±52).
NG Replace rear axle hub.
OK
2 Check rear speed sensor (See page DI±198).
NG Replace rear speed sensor.
OK
3 Check for open and short circuit in harness and connector between rear speed
sensor and ECU (See page IN±29).
NG Repair or replace harness and connector.
OK
Check and replace ABS ECU.
DI03L±04
Page 2356 of 4592
F07156
Ignition
Switch
W24
AM1
IG1
B±YInstrument Panel J/B
19
1K
ECU±IG1JB±RJ/C
J12
C
CB±R13
A14ABS ECU
IG1
Instrument Panel J/B
21
1K
1B
AM1
B±R
FL Block
1
1
F9 F14
ALT
B±G
FL MAIN
Battery
IF A
Instrument
Panel Brace LH J9
Junction
ConnectorW±B
W±B12
A14
A1425GND1
GND2 DI±204
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
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
Condition 1. or 2. is detected:
1. Vehicle speed is at 3 km/h (1.9 mph) or more and ECU
terminal IG1 voltage is 9.5 V or less , which continues
for 10 sec. or more.
2. When IG1 terminal voltage is less than 9.5 V, there is
open circuit in the motor relay or in the solenoid relay, or
the solenoid circuit malfunction.
Battery
Charging system
Power source circuit
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.
WIRING DIAGRAM
DI03M±04
Page 2358 of 4592
F07151
ON
(+)(±)
IG1GND
GND
F07152F07216
LOCK
(±) GND
GND(+)
DI±206
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
3 Check voltage between terminals IG1 and GND of ABS ECU connector.
PREPARATION:
Remove ABS ECU with connectors still connected.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminals IG1 and GND of ABS
ECU connector.
OK:
Voltage: 10 ± 14 V
OK Check and replace ABS ECU.
NG
4 Check continuity between terminals GND of ABS ECU connector and body
ground.
PREPARATION:
Disconnect the connector from the ABS ECU.
CHECK:
Measure resistance between terminal GND of ABS ECU con-
nector and body ground.
OK:
Resistance: 1 W or less
NG Repair or replace harness or connector.
OK
Check for open circuit in harness and connector between ABS ECU and ECU±IG fuse (See page
IN±29).
Page 2359 of 4592
F00124
Battery MAIN B±GF9 F141
ALT FL Block
B±R STOP Instrument Panel J/B
1C1B4
7Stop Light
Switch
2G±W
1R 1S5J23 J24J/C
Light Failure
Sensor
J/C
J34
BKBM
W±BG±W
A145
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±BH8 R10
R8
H8R8
R10 2
122
5 5 G±W
1
2 7
Under the
Left Center
PillarBack Panel
Center
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±207
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 Pub. No. RM654U
on page BE±37).
OK
DI03N±04
Page 2360 of 4592
F07150
(+)(±) STP
DI±208
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
2 Check voltage between terminal STP of ABS ECU and body ground.
PREPARATION:
Remove ABS ECU with connectors still connected.
CHECK:
Measure voltage between terminal STP of ABS ECU and body
ground when brake pedal is depressed.
OK:
Voltage: 8 ± 14 V
OK Check and replace ABS ECU.
NG
3 Check for open circuit in harness and connector between ABS ECU and stop
light switch (See page IN±29).
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown on problem symptoms table (See page DI±185).
Page 2361 of 4592
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
Page 2362 of 4592
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.
