C191A

SUSPENSION CONTROL: ACTIVE STABILIZER SUSPENSION SYSTEM: C191A: Malfunction in Signal from Steering Sensor to Rear Active Stabilizer Control ECU


DESCRIPTION

If the rear active stabilizer control ECU receives a steering sensor malfunction signal, DTC C191A is output. The steering sensor is diagnosed by the skid control ECU and steering control ECU. If electronically controlled brake system and Variable Gear Ratio Steering (VGRS) system related DTCs are output, perform a diagnosis for those DTCs. If no electronically controlled brake or VGRS system DTCs are output, there may be a malfunction in the rear active stabilizer control ECU.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM AND VGRS SYSTEM)

(a) Turn the power switch OFF.

(b) Connect the Techstream to the DLC3.

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

(d) Check that no electronically controlled brake system DTCs are output Reading and Clearing Diagnostic Trouble Codes, and that no VGRS system DTCs are output Variable Gear Ratio Steering System.

Result





C -- GO TO VGRS SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Variable Gear Ratio Steering System

B -- GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Electronically Controlled Brake System

A -- REPLACE REAR ACTIVE STABILIZER CONTROL ECU Removal