DTC    C1201/51    Engine Control System Malfunction

for Preparation Click here


DESCRIPTION

If a malfunction in the engine control system is detected through the CAN, the operations of VSC and TRAC are prohibited by the fail-safe function.

DTC Code
DTC Detection Condition
Trouble Area
C1201/51
Engine control system malfunction signal continues for 1.2 seconds.
SFI system

INSPECTION PROCEDURE

NOTICE:
When replacing the VSC actuator assembly, perform zero point calibration (Click here).
1.CHECK DTC (FOR SFI SYSTEM)

  1. for 1GR-FE:
    Clear the DTC (SFI system) (Click here).
    for 1UR-FE:
    Clear the DTC (SFI system) (Click here).
    for 3UR-FE:
    Clear the DTC (SFI system) (Click here).
    for 3UR-FBE:
    Clear the DTC (SFI system) (Click here).

  1. for 1GR-FE:
    Check the DTC (SFI system) (Click here).
    for 1UR-FE:
    Check the DTC (SFI system) (Click here).
    for 3UR-FE:
    Check the DTC (SFI system) (Click here).
    for 3UR-FBE:
    Check the DTC (SFI system) (Click here).

    Result 
    Result
    		Proceed to
    DTC (SFI system) is not output
    		A
    DTC (SFI system) is output (for 1GR-FE)
    		B
    DTC (SFI system) is output (for 1UR-FE)
    		C
    DTC (SFI system) is output (for 3UR-FE)
    		D
    DTC (SFI system) is output (for 3UR-FBE)
    		E


B
GO TO SFI SYSTEM (Click here)

C
GO TO SFI SYSTEM (Click here)

D
GO TO SFI SYSTEM (Click here)

E
GO TO SFI SYSTEM (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)