C1853

SUSPENSION CONTROL: KINETIC DYNAMIC SUSPENSION SYSTEM: C1851/51,C1853/53: Low Pressure Malfunction in Upside of KDSS System
C1853/53 - High Pressure Malfunction in Upside of KDSS System

DESCRIPTION

In the KDSS hydraulic circuit, the fluid is contained under pressure. If the fluid temperature is 20°C (68°F), the pressure is approximately 3.0 MPa (30.6 kgf/cm2, 435 psi).





INSPECTION PROCEDURE

HINT
- When these DTCs are output, perform the hydraulic circuit inspection first Suspension Control System (W/ KDSS).
- If the DTCs cannot be cleared even after the hydraulic circuit inspection, perform the electrical circuit inspection by following the procedures below.
PROCEDURE

1. INSPECT FOR FLUID LEAK

(a) Inspect for fluid leaks Suspension Control System (W/ KDSS).

OK:

No fluid leaks.

NG -- REPAIR FLUID LEAK OR REPLACE PARTS AS NECESSARY
OK -- Continue to next step.

2. CHECK ANY OTHER DTCS OUTPUT (DTC C1812/12, C1831/31 AND/OR C1832/32)

(a) Check if DTC C1812/12, C1831/31 and/or C1832/32 is output Kinetic Dynamic Suspension System.

Result





B -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Kinetic Dynamic Suspension System
A -- Continue to next step.

3. INSPECT STABILIZER CONTROL SOLENOID VALVE (CHECK IF VALVE STUCK)

(a) Disconnect the stabilizer control with accumulator housing assembly connector.

(b) Check for an operating sound of the stabilizer control solenoid valve.

(1) for Upper Chamber:

Connect terminal 5 (SLAL) to the positive (+) battery terminal, and terminal 4 (AUG) to the negative (-) battery terminal.





OK:

An operating sound (click sound) can be heard.

Text in Illustration





(2) for Lower Chamber:

Connect terminal 6 (SLAU) to the positive (+) battery terminal, and terminal 4 (AUG) to the negative (-) battery terminal.





OK:

An operating sound (click sound) can be heard.

Text in Illustration





NG -- REPLACE STABILIZER CONTROL WITH ACCUMULATOR HOUSING ASSEMBLY Removal
OK -- Continue to next step.

4. INSPECT FOR CLOGS IN HYDRAULIC CIRCUIT

(a) Bleed air and check that the hydraulic circuit is not clogged Service and Repair.

OK:

Hydraulic circuit is not clogged.

NG -- REPAIR HYDRAULIC CIRCUIT MALFUNCTIONS OR REPLACE PARTS AS NECESSARY
OK -- Continue to next step.

5. RECONFIRM DTC

(a) Clear the DTCs Kinetic Dynamic Suspension System.

(b) Check for DTCs Kinetic Dynamic Suspension System.

Result





B -- REPLACE STABILIZER CONTROL ECU

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting