Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 1998-2003 Approved FSM 05 abs ci41
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DI-239
DIAGNOSTICS - ANTI-LOCK BRAKE SYSTEM
DI045-14
DTC 41 IG Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence for the CPU, and actuator.
DTC No. DTC Detecting Condition Trouble Area
Detection of any of conditions from 1. through 3.
1. With vehicle speed at 3 km/h or more, IG1 or +BS termi-
nal voltage is 9.5V or below for 10 sec. or longer.
S Battery
2. With IG1 terminal voltage at 9.5V or below, solenoid
41 S Charging system
relay open, pump motor relay open, solenoid fault de-
S Power source circuit
tecting condition are established.
3. +BS terminal voltage is 19 V or above for 1 sec. or long-
er
2001 SIENNA (RM787U)
Author : Date : 393
DI-240
DIAGNOSTICS - ANTI-LOCK BRAKE SYSTEM
WIRING DIAGRAM
F8 Engine Room J/B No. 2 Driver Side J/B No. 1
Fusible Link Block 40A AM1
2 2 1 2
1 4 1 2 W-L
2D 2L 1B 1K
140A ALT 100A INP W W
2
I12
Engine Room R/B No. 2 Ignition Switch
B-G 60A ABS B-Y 4 AM1 IG1 2
B-L 1 2 W-L
2 2
Driver Side J/B No. 1
1 15A ECU-IG 6
Engine Room J/B No. 2
1K 1A
5 1
2L 2B
6 B-R
2L
Skid Control
FL
ECU
MAIN
15
IG1
W-G 9
+BS
W-R 24
+BM
Engine Room J/B No. 2
4 10
W-B W-B 8
2F 2J GND1
W-B 23
5 GND2
W-B
2C
Battery
EA EE IG
F13446
2001 SIENNA (RM787U)
Author : Date : 394
DI-241
DIAGNOSTICS - ANTI-LOCK BRAKE SYSTEM
INSPECTION PROCEDURE
1 Check ECU-IG fuse.
Instrument Panel J/B PREPARATION:
ECU-IG
Remove ECU-IG fuse from Instrument Panel J/B.
CHECK:
Check continuity of ECU-IG fuse.
OK:
Continuity
F03917
NG Check for short in circuit 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
(See page CH-2 ).
OK
2001 SIENNA (RM787U)
Author : Date : 395
DI-242
DIAGNOSTICS - ANTI-LOCK BRAKE SYSTEM
3 Check voltage between terminals IG1 and GND of ABS actuator connector.
PREPARATION:
ON
Disconnect ABS actuator connector.
15 CHECK:
8
(a) Turn the ignition switch ON.
(b) Measure voltage between terminals IG1(15) - GND(8,
23) of ABS actuator harness side connector.
23 OK:
Voltage: 10 - 14 V
F07877
OK Check or replace ABS actuator assembly.
NG
4 Check continuity between terminals GND of ABS actuator connector and body
ground.
LOCK CHECK:
Measure resistance between terminal GND (8, 23) of ABS ac-
tuator harness side connector and body ground.
(+) OK:
8
Resistance: 1 or less
(-)
23
F06868
NG Repair or replace harness or connector.
OK
Check for open circuit in harness and connector between ABS actuator and ECU-IG fuse
(See page IN-31 ).
2001 SIENNA (RM787U)
Author : Date : 396
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