LEXUS LS430 2003 Factory Repair Manual

NO: COMMUNICATION STOP MODE TABLE (SEE PROBLEM SYMPTOMS TABLE )
YES: GO TO NEXT STEP
5.DTC COMBINATION TABLE (SEE DIAGNOSTIC TROUBLE CODE CHART
)
a. Confirm trouble according to the combination of output DTCs regarding the CAN communication
system.
HINT:
Previous CAN communication system DTCs may be the cause if CAN communication system DTCs are
output and all ECUs and sensors connected to the CAN communication system are displayed on the hand-
held tester's "BUS CHECK" screen via the CAN VIM.
6.CIRCUIT INSPECTION
7.IDENTIFICATION OF PROBLEM
8.REPAIR OR REPLACE
9.CONFIRMATION TEST
END

Fig. 9: Customer Problem Analysis Check Sheet
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
This section describes the standard CAN values for all CAN related components.

Fig. 10: Identifying D-Can Junction Connectors
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

1.JUNCTION CONNECTOR (D-CAN J/C, P-CAN J/C, LUG CAN J/C).
a. D-CAN J/C.
HINT:
The connectors connected to the CAN J/C can be distinguished by the colors of the bus lines
and the connecting side of the connector.
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5100030057004b00480003005600440050004800030056004c[de.
D-CAN JUNCTION CONNECTORS COLORS DETAIL
D-CAN JUNCTION CONNECTORS COLORS DETAIL
HINT:
D-CAN J/C connectors (A side, w/earth terminal)Color (CAN-H
Side)Color (CAN-L
Side)
Suspension control ECU (1)BRY
Gateway ECULGL
CAN main bus line (bus line to connect D-CAN J/C and P-
CAN J/C)BW
(1)w/ Electronic Modulated Air Suspension.
D-CAN J/C connectors (B side, w/o earth terminal)Color (CAN-H Side)Color (CAN-L Side)
DLC3BW
Steering sensorLGL
Skid control ECUBRY
ECMRW

Fig. 11: Identifying P-Can Junction Connectors
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. P-CAN J/C.
HINT:
The connectors connected to the CAN J/C can be distinguished by the colors of the bus lines
and the connecting side of the connector.
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5100030057004b00480003005600440050004800030056004c[de.
P-CAN JUNCTION CONNECTORS COLOR DETAIL
P-CAN JUNCTION CONNECTORS COLOR DETAIL
HINT:
P-CAN J/C connectors (A side, w/earth terminal)Color (CAN-H
Side)Color (CAN-L
Side)
Yaw rate sensorBRY
CAN main bus line (bus line to connect P-CAN J/C and D-
CAN J/C)BW
P-CAN J/C connectors (B side, w/o earth terminal)Color (CAN-H
Side)Color (CAN-L
Side)
Distance control ECU (1)LGL
CAN main bus line (bus line to connect P-CAN J/C and
LUG-CAN J/C)
(2)BW
(1)w/ Dynamic Radar/Laser Cruise Control.
(2)w/ LEXUS Navigation System.

Fig. 12: Identifying Lug-Can Junction Connectors
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. LUG-CAN J/C.
LUG-CAN JUNCTION CONNECTORS COLORS DETAIL
Fig. 13: Identifying Can Junction Connectors
LUG-CAN J/C connectors (A side, w/earth terminal)Color (CAN-H
Side)Color (CAN-L
Side)
Television camera ECULGL
Seat Belt Control ECUBW
CAN main bus line (bus line to connect LUG-CAN J/C and
P-CAN J/C)BW

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
d. The terminals on connectors for the CAN J/C.
TERMINAL AND TERMINAL SYMBOL
e. WIRING DIAGRAM FOR IDENTIFYING CAN J/C CONNECTORS (w/ LEXUS Navigation
System).
TerminalTerminal symbol
1CANH
2CANL

Fig. 14: Wiring Diagram For Identifying Can J/C Connectors (W/ Lexus Navigation System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
f. WIRING DIAGRAM FOR IDENTIFYING CAN J/C CONNECTORS
(w/o LEXUS Navigation System).