Page 1569 of 4500
Fig. 58: Identifying Clearance Warning ECU Assy Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE CLEARANCE WARNING ECU ASSY (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
This circuit provides power to operate the clearance warning ECU assy.
WIRING DIAGRAM
Fig. 59: Power Source Wiring Diagram
Page 1570 of 4500
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.INSPECT FUSE (RR IG FUSE)
a. Remove the RR IG fuse from the luggage room J/B.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TERMINAL NUMBER SPECIFIED CONDITION
ItemConditionSpecified condition
RR IG fuseAlwaysBelow 1 ohms
Page 1571 of 4500
Fig. 60: Identifying RR IG Fuse Location
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: INSPECT FOR SHORT IN ALL COMPONENTS CONNECTED TO FUSE AND REPAIR
OR REPLACE THEM IF NEEDED, AND REPLACE FUSE
OK: Go To Next Step.
2.INSPECT CLEARANCE WARNING ECU ASSY (IG TERMINAL VOLTAGE)
a. Disconnect the C17 connector from the clearance warning ECU assy.
b. Measure the voltage according to the value (s) in the table below.
Page 1572 of 4500
Standard:
TESTER CONNECTION SPECIFIED CONDITION
Fig. 61: Identifying C17 Connector Terminals (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (CLEARANCE WARNING ECU
ASSY - BATTERY)
OK: Go To Next Step.
3.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSY - BODY
GROUND)
a. Disconnect the C17 connector from the clearance warning ECU assy.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
Tester connection (Symbols)ConditionSpecified condition
C17-5 (IG)- Body groundIG switch ON10 to 14 V
Page 1573 of 4500
Fig. 62: Identifying C17 Connector Terminals (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (CLEARANCE WARNING ECU
ASSY - BODY GROUND)
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE
CIRCUIT DESCRIPTION
Turning this switch on activates the clearance sonar system.
WIRING DIAGRAM
Tester connection (Symbols)ConditionSpecified condition
C17-7 (MGND) - Body groundAlwaysBelow 1 ohms
Page 1574 of 4500
Fig. 63: Clearance Sonar Main Switch Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.READ VALUE OF HAND-HELD TESTER
a. Connect the hand-held tester to the DLC3.
b. Turn the ignition switch to the ON position.
c. Turn the hand-held tester on.
d. Turn the clearance sonar main switch on.
e. Select the item below in the DATA LIST, and read its value displayed on the hand-held tester to
check the clearance sonar main switch.
CSONAR:
Page 1575 of 4500
ITEM CONDITION DESCRIPTION
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE
NG: Go To Next Step.
2.INSPECT CLEARANCE WARNING ECU ASSY (CLSW TERMINAL)
a. Disconnect the C17 connector from the clearance warning ECU assy.
b. Measure the voltage according to the value (s) in the table below.
Standard:
Fig. 64: Tester Connection Specified Condition Description Table
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
ConditionItemStandard
Clearance Sonar Main Switch onMAIN SW"ON" is displayed
Page 1576 of 4500
Fig. 65: Identifying CLSW Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: REPLACE CLEARANCE WARNING ECU ASSY (SEE REPLACEMENT
)
NG: Go To Next Step.
3.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSY - BODY
GROUND)
a. Disconnect the C17 connector from the clearance warning ECU assy.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
Tester connectionConditionSpecified condition
C17-7 (MGND) - Body groundAlwaysBelow 1 ohms