C1811

SUSPENSION CONTROL: KINETIC DYNAMIC SUSPENSION SYSTEM: C1811/11: Acceleration Sensor Malfunction

DTC C1811/11 - Acceleration Sensor Malfunction

DESCRIPTION

The acceleration sensor detects the left and right acceleration of the vehicle. When the vehicle accelerates, the acceleration sensor tilts, thus changing its resistance. The resistance is then converted into an electrical signal in order to output the voltage that is proportionate to the acceleration.









WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: Start the inspection from step 1 when using the Techstream, and start from step 2 when not using the Techstream.

PROCEDURE

1. READ VALUE USING DATA LIST
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON and the Techstream on.
(c) Select the item below in the Data List, and read its value displayed on the Techstream.
(d) Check the acceleration.

KDSS:





Standard:
The value displayed on the Techstream is approx. -0.98 to 0.98 m/sec. when the vehicle is stationary.
NG -- CHECK ANY OTHER DTCS OUTPUT (DTC C1761/61, C1774/74)
OK -- REPLACE STABILIZER CONTROL ECU
2. CHECK ANY OTHER DTCS OUTPUT (DTC C1761/61, C1774/74)
(a) Check if DTC C1761/61 or C1774/74 is output Kinetic Dynamic Suspension System.
Result:





HINT:
- If any other codes besides C1811/11 are output, perform troubleshooting for those DTCs first.
- DTC C1761/61 indicates a Stabilizer Control ECU malfunction.
- DTC C1774/74 indicates a low battery positive voltage malfunction.
- If DTCs C1761/61 and C1774/74 are output at the same time, perform troubleshooting necessary for DTC C1774/74 first.

B -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
A -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (STABILIZER CONTROL ECU - ACCELERATION SENSOR ASSEMBLY)




(a) Disconnect the S35 and S36 connectors from the stabilizer control ECU.
(b) Disconnect the A38 connector from the acceleration sensor assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (STABILIZER CONTROL ECU - ACCELERATION SENSOR ASSEMBLY)
OK -- Continue to next step.
4. INSPECT STABILIZER CONTROL ECU




(a) Connect the S35 and S36 connectors to the stabilizer control ECU.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPLACE STABILIZER CONTROL ECU
OK -- Continue to next step.
5. INSPECT ACCELERATION SENSOR ASSEMBLY




(a) Check that the sensor bracket is not deformed.
(b) Remove the acceleration sensor assembly.
(c) Connect 3 dry batteries of 1.5 V in series.
(d) Connect terminal 3 (VGS) to the battery positive (+) terminal, and terminal 2 (GGND) to the battery negative (-) terminal, then measure the voltage between terminals 1 (GL1) and 2 (GGND) in the following conditions.
Standard voltage:





NOTICE:
- Do not apply more than 6 V.
- Do not drop the acceleration sensor assembly. If it is dropped, replace it with a new one.
- Never place the acceleration sensor assembly removed from the vehicle upside down.
- To prevent deformation of the bracket, do not apply excessive force when assembling the RR console box assembly.
HINT:
- When the acceleration sensor assembly is tilted, it may be output a different value.
- When replacing the acceleration sensor assembly, perform the zero point calibration of the acceleration sensor assembly Programming and Relearning.

NG -- REPLACE ACCELERATION SENSOR ASSEMBLY
OK -- REPLACE STABILIZER CONTROL ECU