VARIABLE GEAR RATIO STEERING SYSTEM, Diagnostic DTC:C15C3/75, C15CB/84

DTC Code	DTC Name
C15C3/75	Brake System Control Module
C15CB/84	VSC System Malfunction

DESCRIPTION

The VGRS ECU (front steering control ECU) detects a vehicle speed error by receiving an error signal from the skid control ECU (brake actuator assembly) via CAN communication.

If the VGRS ECU (front steering control ECU) detects this error signal, it turns the master warning light on, and stores this DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Return-to-normal Condition
C15C3/75	Brake System Control Module	All conditions are met: 3 seconds or more after the engine switch is turned on (IG). Power source voltage at 10 to 16 V. Information regarding a vehicle speed signal malfunction is received for approximately 3 seconds or more from the skid control ECU (brake actuator assembly) via CAN communication or there is a VDIM monitoring malfunction.	Skid control ECU (Brake actuator assembly)	Comes on	Engine switch on (IG) again
C15CB/84	VSC System Malfunction	All conditions are met: 3 seconds or more after the engine switch is turned on (IG). Power source voltage at 10 to 16 V. Information regarding a skid control ECU (brake actuator assembly) internal malfunction is received 3 seconds or more via CAN communication.	Skid control ECU (Brake actuator assembly)	Comes on	Engine switch on (IG) again

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Return-to-normal Condition

C15C3/75

Brake System Control Module

All conditions are met:

3 seconds or more after the engine switch is turned on (IG).
Power source voltage at 10 to 16 V.
Information regarding a vehicle speed signal malfunction is received for approximately 3 seconds or more from the skid control ECU (brake actuator assembly) via CAN communication or there is a VDIM monitoring malfunction.

Skid control ECU (Brake actuator assembly)

Comes on

Engine switch on (IG) again

C15CB/84

VSC System Malfunction

All conditions are met:

3 seconds or more after the engine switch is turned on (IG).
Power source voltage at 10 to 16 V.
Information regarding a skid control ECU (brake actuator assembly) internal malfunction is received 3 seconds or more via CAN communication.

Skid control ECU (Brake actuator assembly)

Comes on

Engine switch on (IG) again

CAUTION / NOTICE / HINT

Note

When replacing the brake actuator assembly, perform zero point calibration and store system information.

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Since DTC C1B09/19 is stored in the DRS ECU (rear steering control ECU), after performing repairs on the VGRS system, clear the DTCs for the dynamic rear steering system.

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PROCEDURE

CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)

Check for DTCs in the vehicle stability control system.

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Result

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GO TO VEHICLE STABILITY CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here