C1934

SUSPENSION CONTROL: ACTIVE STABILIZER SUSPENSION SYSTEM: C1934,C1935: Front Metal Board Overheat


DESCRIPTION

If overheating of the front active stabilizer control ECU's metal board or control board is detected, control is stopped to prevent abnormal overheating, and DTC C1934 and/or C1935 are output. The metal board and control board have temperature sensors for detecting overheating. If the temperature returns to normal, the system returns to normal operation.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK MULTI-INFORMATION DISPLAY

(a) Turn the power switch OFF and wait 30 minutes or more.

(b) Check if "Check Active Stabilizer Suspension System" is still displayed on the multi-information display.

HINT
30 minutes is the approximate amount of time that is required for the front active stabilizer control ECU to cool down sufficiently.

Result





B -- INTERCHANGE FRONT AND REAR ACTIVE STABILIZER CONTROL ECU
A -- Continue to next step.

2. INSPECT CONDITIONS (SURROUNDING TEMPERATURE)

(a) Check the temperature around the front active stabilizer control ECU.

HINT
If there are factors causing a high temperature in the front active stabilizer control ECU, eliminate those factors, wait for the ECU to cool down, and recheck for the DTC.

OK:

No factors causing high temperatures

NG -- REPAIR MALFUNCTIONING AREA
OK -- Continue to next step.

3. INTERCHANGE FRONT AND REAR ACTIVE STABILIZER CONTROL ECU

(a) Turn the power switch OFF.

(b) Interchange the front active stabilizer control ECU with the rear active stabilizer control ECU, and install them securely.

HINT
- Interchange the front and rear active stabilizer control ECUs and check for DTCs. After interchanging the ECUs, if a rear stabilizer DTC is displayed, it can be determined that the front active stabilizer control ECU is malfunctioning.
- For the ECU removal and installation procedures, refer to the front ECU procedures Removal or the rear ECU procedures Removal.

NEXT -- Continue to next step.

4. CLEAR DTC

(a) Turn the power switch OFF.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch ON (IG) and the Techstream on.

(d) Clear the DTC Active Stabilizer Suspension System.

NEXT -- Continue to next step.

5. CHECK OPERATION OF FRONT ACTIVE STABILIZER CONTROL ECU

(a) Turn the power switch OFF.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch ON (READY) and wait 30 seconds or more. Then check for rear stabilizer DTCs Active Stabilizer Suspension System.

OK:

DTC C190C and/or C190D are not output

NG -- REPLACE FRONT ACTIVE STABILIZER CONTROL ECU Removal

OK -- RETURNS TO NORMAL OPERATION (SYSTEM RETURNS TO NORMAL DUE TO RETURN OF METAL BOARD OR CONTROL BOARD TO NORMAL TEMPERATURE)