Page 2945 of 4770
F07146
B±G
Fusible
Link
Block
F5 1
F4
1
FL
Main B±G
Battery3
3ABSABS Motor
Relay
2 13
43
3
Engine Room R/B No.3GR±R GR±R1
IK126
A19 R+ABS ECU
GR±L1
A18 MR
W±R2
A4
A41
W±B
EAABS Actuator
3
A4R±W10
A18 MT ALT
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±525
760 Author: Date:
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±01
Page 2946 of 4770
F03291
(±)
(+)12 A4
DI±526
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
761 Author: Date:
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±31).
NG
Replace ABS actuator.
Page 2947 of 4770
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
DI±527
762 Author: Date:
DTC Always ON ABS ECU Malfunction
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
Always ONABS ECU internal malfunction is detected.ECU
Battery
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.
INSPECTION PROCEDURE
1 Is DTC output?
Check DTC on page DI±493.
YES Repair circuit indicated by the code output.
NO
2 Is normal code displayed?
YES Check ABS solenoid relay. Check for short cir-
cuit in harness and connector between ABS so-
lenoid relay and DLC1 (See page IN±31).
NO
3 Is ABS warning light go off?
YES Check for open or short circuit in harness and
connector between ECU±IG fuse and ABS ECU
(See page IN±31).
NO
DI03P±04
Page 2948 of 4770
DI±528
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM (DENSO Made)
763 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 ECU.
(b) Turn the ignition switch ON.
CHECK:
Check the ABS warning light goes off.
OK Check and replace ABS ECU.
NG
Check for short circuit in harness and connector between ABS warning light, DLC1, DLC2, and
ABS ECU (See page IN±31).
Page 2949 of 4770

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
Page 2950 of 4770

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).
Page 2951 of 4770
± 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).
Page 2952 of 4770
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