Code C1201 Engine Control System Malfunction (w/o VDIM)

Description

Inspection procedure

Check engine control system

Reconfirm DTC

Replace ECM

Reconfirm DTC

Description

If a malfunction in the engine control system is detected, the operations of VSC and TRC are prohibited by the fail safe function. When the signals from the engine are input normally, the fail safe is cancelled and the DTC is not stored.  

DTC No. DTC Detection Condition Trouble Area
C1201/51 Engine control system malfunction signal continues for 5 seconds. Engine control system

Inspection procedure

NOTICE:

When replacing the brake actuator assembly, perform zero point calibration .

 

1.CHECK ENGINE CONTROL SYSTEM

  1. Check if the engine control system DTC is output .

Result:

Condition Proceed to
DTC is not output A
DTC is output B
  B  
INSPECT ENGINE CONTROL SYSTEM
 
A  
   

2.RECONFIRM DTC

  1. Clear the DTC .

  1. Perform a road test.

  1. Check if the same DTC is recorded .

Result:

Condition Proceed to
DTC (C1201/51) is output A
DTC (C1201/51) is not output B
  B  
USE SIMULATION METHOD TO CHECK
 
A  
   

3.REPLACE ECM

  1. Turn the engine switch off.

  1. Replace the ECM .

NEXT  
   

4.RECONFIRM DTC

  1. Clear the DTC .

  1. Perform a road test.

  1. Check if the same DTC is recorded .

Result:

Condition Proceed to
DTC (C1201/51) is output A
DTC (C1201/51) is not output B
  B  
END
 
A  
   
REPLACE BRAKE ACTUATOR ASSEMBLY