C1812

SUSPENSION CONTROL: KINETIC DYNAMIC SUSPENSION SYSTEM: C1812/12: Pressure Sensor Malfunction / Upside
C1812/12 - Pressure Sensor Malfunction / Upside

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).





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (OIL PRESSURE SENSOR)

NOTICE:
- Perform the inspection on a level surface.
- Perform the inspection with the vehicle empty.
- Make sure that the wheels are on the ground and facing straight ahead.
- Perform the inspection with the vehicle load completely on the suspension.

(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 / KDSS / Data List.

(f) Select the item below in the Data List, and read the value displayed on the Techstream.

KDSS





(g) Check the fluid pressure.

OK:

2.6 MPa (26.5 kgf/cm2, 377 psi) to 3.0 MPa (30.6 kgf/cm2, 435 psi)

NG -- INSPECT STABILIZER CONTROL ECU (SBP1 VOLTAGE)
OK -- Continue to next step.

2. RECONFIRM DTC

(a) Clear the DTCs Kinetic Dynamic Suspension System.

(b) Check for DTCs Kinetic Dynamic Suspension System.

Result





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

A -- REPLACE STABILIZER CONTROL ECU Removal

3. INSPECT STABILIZER CONTROL ECU (SBP1 VOLTAGE)

(a) Connect the stabilizer control ECU connector.

(b) Disconnect the stabilizer control with accumulator housing connector.

(c) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (STABILIZER CONTROL ECU - ACCUMULATOR PRESSURE SENSOR)
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (STABILIZER CONTROL ECU - ACCUMULATOR PRESSURE SENSOR)

(a) Disconnect the stabilizer control ECU connector.

(b) Disconnect the stabilizer control with accumulator housing connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. INSPECT ACCUMULATOR PRESSURE SENSOR (OUTPUT VOLTAGE)

(a) Connect the stabilizer control ECU connector.

(b) Connect the stabilizer control with accumulator housing connector.

(c) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





Text in Illustration





NG -- READ VALUE USING TECHSTREAM (OIL PRESSURE SENSOR)

OK -- REPLACE STABILIZER CONTROL ECU Removal

6. READ VALUE USING TECHSTREAM (OIL PRESSURE SENSOR)

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

(b) Connect the stabilizer control ECU connector.

(c) Connect the Techstream to the DLC3.

(d) Turn the engine switch on (IG).

(e) Turn the Techstream on.

(f) Enter the following menus: Chassis / KDSS / Data List.

(g) Select the item below in the Data List, and read the value displayed on the Techstream.

KDSS





(h) Using a 1.5 V dry cell battery, connect the positive (+) lead to terminal 2 (SOP1) of the stabilizer control with accumulator housing connector and the negative (-) lead to terminal 1 (SGP1), and check that the Data List display changes.





OK:

Data List display changes.

Text in Illustration





NG -- REPLACE STABILIZER CONTROL ECU Removal

OK -- REPLACE STABILIZER CONTROL
WITH ACCUMULATOR
HOUSING ASSEMBLY Removal

7. CHECK HARNESS AND CONNECTOR (STABILIZER CONTROL ECU - ACCUMULATOR PRESSURE SENSOR)

(a) Disconnect the stabilizer control ECU connector.

(b) Disconnect the stabilizer control with accumulator housing connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE STABILIZER CONTROL ECU Removal