C1733
SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1731/31-C1734/34: FR Damping Force Control Actuator Circuit
DESCRIPTION
The absorber control actuator switches the damping force depending on the suspension control ECU signals.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When replacing the suspension control ECU, perform registration Testing and Inspection.
PROCEDURE
1. PERFORM ACTIVE TEST USING TECHSTREAM (DAMPER STEP)
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / Air suspension / Active Test.
Air Suspension
OK:
The absorber control actuator operates.
NG -- INSPECT ABSORBER CONTROL ACTUATOR
OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
2. INSPECT ABSORBER CONTROL ACTUATOR
(a) Turn the engine switch off.
(b) Check the front absorber control actuator RH (when DTC C1731/31 is output).
(1) Disconnect the A44 actuator connector.
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(c) Check the front absorber control actuator LH (when DTC C1732/32 is output).
(1) Disconnect the A45 actuator connector.
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(d) Check the rear absorber control actuator RH (when DTC C1733/33 is output).
(1) Disconnect the S1 actuator connector.
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(e) Check the rear absorber control actuator LH (when DTC C1734/34 is output).
(1) Disconnect the S3 actuator connector.
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
Result
E -- REPLACE REAR SHOCK ABSORBER ASSEMBLY LH
D -- REPLACE REAR SHOCK ABSORBER ASSEMBLY RH
C -- REPLACE FRONT ABSORBER CONTROL ACTUATOR LH
B -- REPLACE FRONT ABSORBER CONTROL ACTUATOR RH
A -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (ABSORBER CONTROL ACTUATOR - SUSPENSION CONTROL ECU)
(a) Check the front side absorber control actuator.
(1) Disconnect the A44 and/or A45 front absorber control actuator connector.
(2) Disconnect the A11 suspension control ECU connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for Front RH (for DTC C1731/31)
for Front LH (for DTC C1732/32)
(b) Check the rear side absorber control actuator.
(1) Disconnect the S1 and/or S3 rear absorber control actuator connector.
(2) Disconnect the R22 suspension control ECU connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for Rear RH (for DTC C1733/33)
for Rear LH (for DTC C1734/34)
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE SUSPENSION CONTROL ECU Removal