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Fig. 19: DTC C1711, C1712, C1713 And C1714 DTC Detecting Condition And Trouble Area
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
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Fig. 20: Front Height Control Sensor Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
HINT:
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Proceed to troubleshooting following the flow chart, regardless of whether or not DTC C1711, C1712, C1713
or C1714 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 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
OK:Go to next step
2.READ VALUE ON HAND-HELD TESTER
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 displayed on the hand-held tester.
AIRSUS:
Fig. 21: Air sus
- Data List
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
d. Check the vehicle height value of each sensor while pressing the height control switch "UP" and
"DOWN".
OK:
Vehicle height value changes.
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NG: Go to step 3
OK: REPLACE SUSPENSION CONTROL ECU (SEE REPLACEMENT
)
3.CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR SUB-ASSY POWER
SOURCE) (SEE ELECTRONIC CIRCUIT INSPECTION PROCEDURE
)
a. Disconnect the height control sensor sub-assy connector.
b. Turn the ignition switch to the ON position.
c. Measure the voltage according to the value (s) in the table below.
TESTER CONNECTION STANDARD SPECIFIED CONDITION (FRONT RH)
Fig. 22: Identifying Front Height Control Sensor Sub
-Assy Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
TESTER CONNECTION STANDARD SPECIFIED CONDITION Standard (Front LH)
Tester ConnectionSpecified Condition
H14-1 (SHB) - H14-4 (SHG)4.5 to 5.5 V
Tester ConnectionSpecified Condition
H13-1 (SHB) - H13-4 (SHG)4.5 to 5.5 V
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Fig. 23: Identifying Height Control Sensor Sub-Assy Connector Terminals - RH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (Rear RH)
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (REAR LH)
Tester ConnectionSpecified Condition
H31-1 (SHB) - H31-3 (SHG)4.5 to 5.5 V
Tester ConnectionSpecified Condition
H30-1 (SHG) - H30-3 (SHB)4.5 to 5.5 V
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Fig. 24: Identifying Height Control Sensor Sub-Assy Connector Terminals - LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: Go to step 4
OK:Go to next step
d.CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - HEIGHT
CONTROL SENSOR SUB-ASSY) (SEE ELECTRONIC CIRCUIT INSPECTION
PROCEDURE )
a. Disconnect the suspension control ECU A21 or A22 connector.
b. Measure the resistance according to the value (s) in the table below.
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Fig. 25: Identifying Suspension Control ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HEIGHT CONTROL SENSOR FRONT RH: (C1711)
TESTER CONNECTION STANDARD SPECIFIED CONDITION:
Tester ConnectionSpecified Condition
A21-20 (SHFR) - H14-2 (SHFR)Below 1 ohms
A21-20 (SHFR) - Body ground10 Kohms or higher
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Fig. 26: Identifying Height Control Sensor Sub-Assy Connector Terminals - RH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HEIGHT CONTROL SENSOR FRONT LH: (C1712)
TESTER CONNECTION STANDARD SPECIFIED CONDITION
Tester ConnectionSpecified Condition
A21-22 (SHFL) - H13-2 (SHFL)Below 1 ohms
A21-22 (SHFL) - Body ground10 Kohms or higher