Page 534 of 4500
CIRCUIT DESCRIPTION
Absorber control actuator switches the damping force depending on the suspension control ECU signals.
Fig. 54: DTC C1725 And DTC C1728 Detecting Condition And Trouble Area
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Page 535 of 4500
Fig. 55: Front Absorber Control Actuator Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.INSPECT ABSORBER CONTROL ACTUATOR OPERATION
a. Connect the han
d-held tester to the DLC3.
Page 549 of 4500
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030024005500480044[
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Fig. 69: Exhaust Solenoid Valve Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.RECONFIRM DTC
a. Check DTCs (SEE DTC CHECK/CLEAR
).
1. Confirm if DTC C1761 and/or C1774 is recorded.
OK:
DTC C1761 and/or C1774 is not output.
HINT:
If either DTC C1761 (ECU malfunction) (SEE DTC C1761 ECU MALFUNCTION
or DTC C1774
POWER SOURCE CIRCUIT ) is displayed, carry out the necessary inspection. If they are output at the
same time, carry out the necessary inspection for DTC C1774 first.
NG: REPAIR CIRCUIT INDICATED BY OUTPUT CODE
Page 555 of 4500
CIRCUIT DESCRIPTION
FRONT HEIGHT CONTROL SOLENOID VALVE:
The height control valve sub-assy No. 1 (front height control solenoid valve) independently opens and closes
paths to the pneumatic cylinder for the front wheel side by receiving signals from the suspension control ECU.
HINT:
The right left solenoid valves are integrated and mounted on front side.
REAR HEIGHT CONTROL SOLENOID VALVE:
The height control valve sub-assy No. 2 (rear height control solenoid valve) independently opens and closes
paths to the pneumatic cylinder for the rear wheel side by receiving signals from the suspension control ECU.
HINT:
The right left solenoid valves are integrated and mounted on rear side.
Fig. 74: DTC C1737 And DTC C1740 Detecting Condition And Trouble Area
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Page 556 of 4500
Fig. 75: Front Height Control Solenoid Valve Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
HINT:
Proceed to troubleshooting following the flow chart, regardless of whether or not DTC C1737, C1738, C1739
or C1740 is displayed.
1.RECONFIRM DTC
a. Check DTCs (SEE DTC CHECK/CLEAR
).
1. Confirm if DTC C1761 and/or C1774 is recorded.
OK:
DTC C1761 and/or C1774 is output.
HINT:
If either DTC C1761 (ECU malfunction) (SEE DTC C1761 ECU MALFUNCTION
or DTC C1774
Page 567 of 4500
Fig. 85: DTC C1741 Detecting Condition And Trouble Area
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Fig. 86: Air Sus Relay Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.RECONFIRM DTC
a. Check DTCs (SEE DTC CHECK/CLEAR
).
1. Confirm if the DTC C1761 and/or C1774 is recorded.
OK:
DTC C1761 and/or C1774 is not output.
HINT:
If either DTC C1761 (ECU malfunction) (SEE DTC C1761 ECU MALFUNCTION
or DTC C1774
Page 573 of 4500
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Fig. 92: Height Control Compressor Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.RECONFIRM DTC
a. Check DTCs (SEE DTC CHECK/CLEAR
).
1. Confirm if DTC C1741 is recorded.
OK:
DTC C1741 is not output.
Page 599 of 4500
Fig. 114: DTC C1774 Detecting Condition And Trouble Area
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Fig. 115: Power Source Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.INSPECT SUSPENSION CONTROL ECU
a. Connect the hand-held tester to the DLC3.
b. Turn the ignition switch to the ON position and turn the hand-held tester main switch on.
c. Select the item below in the DATA LIST and read its value displa
yed on the hand-held tester.
