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a. Disconnect the television camera ECU sub bus line connector (J52) from the LUG-CAN J/C A side
(w/earth terminal).
Fig. 251: Identifying DLC3 Connector terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Measure the resistance according to the value (s) in the table below.
Standard:
DLC3 CONNECTOR TERMINALS RESISTANCE
OK: REPAIR OR REPLACE TELEVISION CAMERA ECU SUB BUS LINE OR CONNECTOR
NG: GO TO NEXT STEP
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-4 (CG)Ignition Switch OFF1 kohms or more
D1-14 (CANL) - D1-4 (CG)Ignition Switch OFF1 kohms or more
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44.CONNECT CONNECTOR
a. Reconnect the television camera ECU sub bus line connector (J52) to the LUG-CAN J/C A side
(w/earth terminal).
45.CHECK CAN BUS LINE FOR SHORT TO GND
Fig. 252: Identifying DLC3 Connector terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the seat belt control ECU connector (S63).
b. Measure the resistance according to the value (s) in the table below.
Standard:
DLC3 CONNECTOR TERMINALS RESISTANCE
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-4 (CG)Ignition Switch OFF1 kohms or more
D1-14 (CANL) - D1-4 (CG)Ignition Switch OFF1 kohms or more
Page 1467 of 4500
NG: REPAIR OR REPLACE SEAT BELT CONTROL ECU SUB BUS LINE OR CONNECTOR
OK: REPLACE SEAT BELT CONTROL ECU
CIRCUIT DESCRIPTION
There may be a short circuit between the CAN bus line and GND when there is resistance between terminals 6
(CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3.
Fig. 253: Problem Symptom Diagnostic Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Page 1468 of 4500
Fig. 254: Wiring Diagram - CAN Bus Line For Short To GND (W/O LEXUS Navigation System) (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Page 1469 of 4500
Fig. 255: Wiring Diagram - CAN Bus Line For Short To GND (W/O LEXUS Navigation System) (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.CHECK CAN BUS LINE FOR SHORT TO GND (DLC3 SUB BUS LINE)
Page 1470 of 4500
Fig. 256: Identifying DLC3 Sub Bus Line Connector (J42)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Turn the ignition switch to the LOCK position.
b. Disconnect the DLC3 sub bus line connector (J42) from the D-CAN J/C B side (w/o earth
terminal).
Page 1471 of 4500
Fig. 257: Identifying DLC3 Connector terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Measure the resistance according to the value (s) in the table below.
Standard:
DLC3 CONNECTOR TERMINALS RESISTANCE
NG: REPAIR OR REPLACE DLC3 SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
OK: GO TO NEXT STEP
2.CONNECT CONNECTOR
a. Reconnect the DLC3 sub bus line connector (J42) to the D-CAN J/C B side (w/o earth terminal).
3.CHECK CAN BUS LINE FOR SHORT TO GND (CAN BUSES TO P-CAN J/C)
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-4 (CG)Ignition Switch OFF1 Mohms or more
D1-14 (CANL) - D1-4 (CG)Ignition Switch OFF1 Mohms or more
Page 1472 of 4500
Fig. 258: Disconnecting CAN Main Bus Line Connector (J45) From P-CAN J/C A Side (W/Earth
Terminal)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the CAN main bus line connector (J45) from the P-CAN J/C A side (w/earth terminal).