C1959

SUSPENSION CONTROL: ACTIVE STABILIZER SUSPENSION SYSTEM: C1959: IG Power Supply Voltage in Front ECU
C1959 - IG Power Supply Voltage in Front ECU

DESCRIPTION

When an abnormal IG power supply voltage of the front active stabilizer control ECU is detected, DTC C1959 is output.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION

(a) Turn the power switch OFF.

(b) Check that the connectors of the front active stabilizer control ECU are not loose or disconnected.

OK:

Connectors are not loose or disconnected

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 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.

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.

(d) Clear the DTC Active Stabilizer Suspension System.

NEXT -- Continue to next step.

4. 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 DTC Active Stabilizer Suspension System.

OK:

DTC C1952 is not output

NG -- REPLACE FRONT ACTIVE STABILIZER CONTROL ECU Removal

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