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HINT:
When the acceleration sensor assy is tilted, it may output a different value.
NG: REPLACE HEIGHT CONTROL SENSOR SUB-ASSY FRONT RH (SEE REPLACEMENT
)
OK: Go to step 4
3.INSPECT ACCELERATION SENSOR
a. Remove the acceleration sensor.
b. Connect 3 dry batteries of 1.5 V in series.
c. Connect terminal 3 (VGS) to the batteries' positive (+) terminal, and terminal 2 (GGND) to the
batteries' negative (-) terminal, then apply voltage of approximately 4.5 V between terminals 1
(GL1) and 2 (GGND) for the following conditions.
SENSOR CONDITION AND VOLTAGE SPECIFICATIONS
Sensor conditionVoltage
Sensor stationaryApprox. 2.3 V
Sensor vibrating verticallyChange between approx. 1.0 to 4.0 V
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Fig. 50: Inspecting Acceleration Sensor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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HINT:
When the acceleration sensor is tilted, it may output the different value.
NG: REPLACE ACCELERATION SENSOR
OK:Go to next step
4.CHECK HARNESS AND CONNECTOR (ACCELERATION SENSOR - SUSPENSION
CONTROL ECU) (SEE ELECTRONIC CIRCUIT INSPECTION PROCEDURE
)
a. Disconnect the suspension control ECU A20 or A22 connector.
b. Measure the resistance according to the value (s) in the table below.
Fig. 51: Identifying Suspension Control ECU Connector Terminals
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Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (FRONT RH)
Fig. 52: Identifying Height Control Sensor Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (REAR)
Tester ConnectionSpecified Condition
A20-20 (SBR1) - H14-1 (SHB)Below 1 ohms
A20-21 (SGR1) - H14-4 (SHG)Below 1 ohms
A22-29 (SGFL) - H14-3 (SGFR)Below 1 ohms
A20-20 (SBR1) - Body ground10 Kohms or higher
A20-21 (SGR1) - Body ground10 Kohms or higher
A22-29 (SGFL) - Body ground10 Kohms or higher
Tester ConnectionSpecified Condition
A22-12 (SGR3) - A32-2 (GGND)Below 1 ohms
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NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE SUSPENSION CONTROL ECU (SEE REPLACEMENT
)
Fig. 53: Identifying Height Control Sensor Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
A22-15 (SBR3) - A32-3 (VGS)Below 1 ohms
A22-27 (SGRR) - A32-1 (GL1)Below 1 ohms
A22-12 (SGR3) - Body ground10 Kohms or higher
A22-15 (SBR3) - Body ground10 Kohms or higher
A22-27 (SGRR) - Body ground10 Kohms or higher
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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
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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.
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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 ACTIVE TEST and operate it with the hand-held tester.
NORMAL CONDITION DESCRIPTION
d. Check the hardness of the absorber while operating the absorber control actuator level from 1 to 17
or from 17 to 1 through the ACTIVE TEST.
OK:
Hardness of the absorber becomes harder or softer.
NG: Go to step 2
OK: REPLACE SUSPENSION CONTROL ECU (SEE REPLACEMENT
)
2.INSPECT ABSORBER CONTROL ACTUATOR
a. Disconnect the absorber control actuator connector.
b. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (FRONT RH)
ItemNormal Condition
DAMPER FR1 to 17 step (The absorber becomes softer as the level approaches to 1 and harder
as the level approaches to 17)
DAMPER FL1 to 17 step (The absorber becomes softer as the level approaches to 1 and harder
as the level approaches to 17)
DAMPER RR1 to 17 step (The absorber becomes softer as the level approaches to 1 and harder
as the level approaches to 17)
DAMPER RL1 to 17 step (The absorber becomes softer as the level approaches to 1 and harder
as the level approaches to 17)
Tester ConnectionSpecified Condition
1 (FBR+) - 3 (GND)12.0 to 12.8 ohms
2 (FAR+) - 3 (GND)12.0 to 12.8 ohms
3 (GND) - 4 (FBR-)12.0 to 12.8 ohms
3 (GND) - 5 (FAR-)12.0 to 12.8 ohms