Air Suspension System
SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1725/21: Front Damping Force Control Actuator RH Circuit
DTC C1725/21 - Front Damping Force Control Actuator RH Circuit
DTC C1726/22 - Front Damping Force Control Actuator LH Circuit
DTC C1727/23 - Rear Damping Force Control Actuator RH Circuit
DTC C1728/24 - Rear Damping Force Control Actuator LH Circuit
DESCRIPTION
Absorber control actuator switches the damping force depending on the suspension control ECU signals.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. INSPECT ABSORBER CONTROL ACTUATOR OPERATION
(a) When using the Techstream:
(1) Connect the the Techstream to DLC3.
(2) Turn the ignition switch ON and the Techstream on.
(3) Select the item "Damper Step FR", "Damper Step FL", "Damper Step RR" or "Damper Step RL" in the Active Test, and operate it on the Techstream.
(4) With the Techstream, check if the absorber control actuator operates making the suspension harder or softer.
Standard:
The absorber control actuator operates making the suspension harder or softer.
(b) When using SST check wire:
(1) Using SST, connect terminal TS and CG of DLC3 with the ignition switch at OFF (TEST mode).
(2) Start the engine.
- Under this condition, the absorber control actuator position is 1 (Soft).
(3) Starting from the above mentioned position, as the brake pedal is depressed, the absorber control actuator position increases (1 -> 2 -> 3 -> 15 -> 16). Bounce the vehicle and check that the shock absorber becomes harder.
Standard::
The shock absorber becomes harder.
SST: 09843-18040
OK -- CHECK AND REPLACE SUSPENSION CONTROL ECU
NG -- Continue to next step.
2. INSPECT ABSORBER CONTROL ACTUATOR
(a) Absorber control actuator front
(1) Disconnect the absorber control actuator connector.
(2) Measure the resistance between each terminal of the front absorber control actuator.
Standard resistance:
Result:
(b) Absorber control actuator rear
(1) Disconnect the absorber control actuator connector.
(2) Measure the resistance between each terminal of the front absorber control actuator.
Standard resistance:
Result:
C -- REPLACE SHOCK ABSORBER ASSEMBLY REAR LH
B -- REPLACE ABSORBER CONTROL ACTUATOR
A -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (ABSORBER CONTROL ACTUATOR-SUSPENSION CONTROL ECU)
(a) Check for open and short circuit in the harness and the connector between the absorber control actuator and the suspension control ECU Electronic Circuit Inspection Procedure.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- CHECK AND REPLACE SUSPENSION CONTROL ECU