Up to 08/2009

SUSPENSION CONTROL: ACTIVE STABILIZER SUSPENSION SYSTEM: C1912: Malfunction in Rear Active Stabilizer Control ECU Short Relay Power Supply IC
C1912 - Malfunction in Rear Active Stabilizer Control ECU Short Relay Power Supply IC

DESCRIPTION

When a malfunction is detected in the motor short relay power supply IC of the rear active stabilizer control ECU, DTC C1912 is output.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION

(a) Turn the power switch off.

(b) Check that the wire harness connectors between the rear active stabilizer control ECU and rear active stabilizer control actuator assembly are not loose or disconnected and that the wire harness is not damaged.

OK:

Connectors are not loose or disconnected. Wire harness is not damaged.

HINT
If the wire harness of the rear active stabilizer control actuator assembly is damaged, replace the rear active stabilizer control actuator assembly Removal.

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

2. INTERCHANGE FRONT AND REAR ACTIVE STABILIZER CONTROL ECU

(a) Turn the power switch off.

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

NEXT -- Continue to next step.

3. 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.

4. CHECK OPERATION OF REAR 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 front active stabilizer DTCs Active Stabilizer Suspension System.

OK:

DTC C1938 is not output.

HINT
Interchange the front and rear active stabilizer control ECUs and check for DTCs. After interchanging the ECUs, if a front active stabilizer DTC is stored, it can be determined that the rear active stabilizer control ECU is malfunctioning. If no DTC is stored, the rear active stabilizer control actuator assembly is malfunctioning.

NG -- REPLACE ACTIVE STABILIZER CONTROL ECU ASSEMBLY Removal

OK -- REPLACE REAR ACTIVE STABILIZER CONTROL ACTUATOR ASSEMBLY Removal