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05–2626
DIAGNOSTICS
–
CAN COMMUNICATION SYSTEM
05IFC–01
SKID CONTROL ECU COMMUNICATION STOP MODE
MODE DESCRIPTION
Detection Item
Symptom
Trouble Area
”ABS & VSC & TRAC” is not displayed on the ”BUS
CHECK” screen of the hand–held tester.
SKID CONTROL
ECU COMMU-
NICATION STOP
MODE
Power source or inside the skid control ECU
Skid control ECU sub bus line or connector
Applies to ”SKID CONTROL ECU COMMUNICATION
STOP MODE” in the ”DTC COMBINATION TABLE” (see
page 05–2605 ).
WIRING DIAGRAM
Skid Control ECU
J15
J/C1
12
18
W
W
IA1
S8
CAN–L
A
11
IA1
19
S8
B
B
CAN–H
B
Driver Side J/B
Center Connector No.1
IGN
6
4I
4
9
1A
5
6
4G
O
B
B
1J
S10
IG2
J4 J/C
IG1 Relay ECU–IG
7
24
1
W
B
B
IG1
1B
1A
S8
BB
5
3
Engine Room J/B
J2
J/C
1
B
3M
1
DC/DC
P/I
W
1
1
IA1
W
A
A
3D
3A
2
1
1
2
IG2 Relay
AM2
4
1
W
3I
3K
F15
FL Block
2
1
1
BE1
B
1
1
MAIN
W
S7
GND
2
W–B
W
S8
GND2
1
W
S8
GND3
2
W–B
S9
GND4
1
W–B
W–B
S9
GND5
4
EF
EE
W–B
Battery
S10
GND6
G30906
2004 Prius – Preliminary Release (RM1075U)
Author:
Date:
2790
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05–2627
DIAGNOSTICS
–
CAN COMMUNICATION SYSTEM
INSPECTION PROCEDURE
1
CHECK CAN BUS LINE FOR DISCONNECTION(SKID CONTROL ECU SUB BUS
LINE)
(a)
Turn the power switch off.
Skid Control ECU
Wire Harness View:
(b)
Disconnect the skid control ECU connector (S8).
(c)
Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connection
Condition
Specified value
CAN–H
S8–19 (GAN–H) –
S8–18 (CAN–L)
S8
Power Switch OFF
54 to 69 W
CAN–L
G32345
G30502
NG
REPLACE SKID CONTROL ECU SUB BUS LINE
OR CONNECTOR (CAN–H, CAN–L)
OK
2
CHECK WIRE HARNESS(IG1,IG2,GND,GND2,GND3,GND4,GND5,GND6)
(a)
Disconnect the skid control ECU connectors (S7), (S9),
and (S10).
Skid Control ECU Wire Harness View:
(b)
Measure the resistance according to the value(s) in the
table below.
(c)
Measure the voltage according to the value(s) in the table
below.
GND2
GND4
GND6
GND
GND3
GND5
Standard:
Tester connection
IG1
IG2
Condition
Specified value
S7–1 (GND) –
Body ground
Always
Below 1
W
S8–1 (GND3) –
Body ground
Always
Below 1
W
S7
S8
S9
S10
S8–2 (GND2) –
Body ground
Always
Below 1 W
G32399
S9–1 (GND5) –
Body ground
Always
Below 1 W
S9–2 (GND4) –
Body ground
Always
Below 1
W
S10–4 (GND6) –
Body ground
Always
Below 1 W
S8–7 (IG1) –
Body ground
Power Switch ON (IG)
10 to 14 V
S10–5 (IG2) –
Body ground
Power Switch ON (IG)
10 to 14 V
NG
REPAIR OR REPLACE WIRE HARNESS OR
CONNECTOR
OK
REPLACE SKID CONTROL ECU ASSY (SEE PAGE 32–68 )
2004 Prius – Preliminary Release (RM1075U)
Author:
Date:
2791
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